RWBII Plus S70-200 OM.indd

MICROPROCESSOR CONTROL

Form S70-200 OM (DEC 1999)

OPERATION - MAINTENANCE

File: SERVICE MANUAL - Section 70

Replaces: S70-200 OM/MAR 99

Dist: 3, 3a, 3b, 3c

THIS MANUAL CONTAINS OPERATION AND MAINTENANCE

INSTRUCTIONS. READ THOROUGHLY BEFORE BEGINNING

INSTALLATION. FAILURE TO FOLLOW THESE INSTRUCTIONS

COULD RESULT IN DAMAGE OR IMPROPER OPERATION

OF THE UNIT.

RWB II PLUS MICROPROCESSOR CONTROL

OPERATION - MAINTENANCE

S70-200 OM (DEC 99)

Page 2

Contents

MICROPROCESSOR CONTROL PANEL ..................................................................................................................................... 3

KEYS AND KEY FUNCTIONS ...................................................................................................................................................... 4

TO CHANGE THE ADJUSTABLE SETPOINTS: ........................................................................................................................... 6

HOW TO DETERMINE ADJUSTABLE SETPOINTS: .................................................................................................................... 7

TEMPERATURE-PRESSURE CONTROL PROGRAM (OPTION) .............................................................................................. 10

LEAD-LAG OPTION .................................................................................................................................................................... 12

COMMUNICATIONS TROUBLESHOOTING ...............................................................................................................................13

HOW THE MICROPROCESSOR WORKS - SUMMARY - .......................................................................................................... 13

MULTIPLE COMPRESSOR SEQUENCING ............................................................................................................................... 14

SUGGESTED PROGRAMMABLE CONTROLLER PROGRAM TO DECODE

MICROPROCESSOR OUTPUT DATA CODES ................................................................................................................... 14

MICROPROCESSOR OUTPUT DATA CODE .............................................................................................................................15

MICROPROCES SOR TEL ECOM MUNICATIONS ....................................................................................................................... 16

COMMUNICATIONS PROTOCOL SPECIFICATIONS: ............................................................................................................... 16

TROUBLESHOOTING THE RWB II PLUS MICROPRO CESSOR .............................................................................................. 20

GENERAL INFORMATION ..........................................................................................................................................................20

TROUBLESHOOTING FRICK SBC MICROPROC ESSOR SYSTEM .........................................................................................20

TESTING MICRO-PANEL ALARMS/CUTOUTS .........................................................................................................................23

EPROM MEMORY I/C CHIP REPLACEMENT ...........................................................................................................................25

SBC BOARD REPLACEMENT ....................................................................................................................................................25

MICROPROCESSOR DISPLAY REPLACEMENT ...................................................................................................................... 25

OUTPUT FUSE REPLACEMENT ............................................................................................................................................... 25

SBC WIRING DIAGRAM ............................................................................................................................................................. 26

POINT-TO-POINT FIELD WIRING DIAGRAM ............................................................................................................................. 26

MICRO COMPONENT PLACEMENT DIAGRAM ........................................................................................................................27

RWB II PLUS TELECOMMUNICATIONS ....................................................................................................................................27

MICROPANEL ASSEMBLY WIRING DIAGRAMS .......................................................................................................................28

RWB II PLUS MICROPROCESSOR CONTROL

OPERATION

S70-200 OM (DEC 99)

Page 3

MICROPROCESSOR CONTROL PANEL

The following must be read in addi-

tion to the Operation and Start-up in-

structions in S70-200 IOM before at-

tempting to start or operate the unit.

The RWB II PLUS compressor is controlled by a state-of-

the-art microproces sor control system. The microprocessor

continuously monitors the com pressor unit’s condition and

operation. The mi croprocessor also directs instructions to

the various compressor unit subsystems.

The microprocessor has a membrane switch keyboard.

Pressing the keyboard in the area outlined as a key will cause

that function to be recognized by the microproces sor. The

keyboard has 32 membrane type keys.

In addition to the keyboard, there is an emergency stop but-

ton. Pushing the emer gency stop will by pass the computer

and remove all power from the outputs.

This will shut down the compressor motor and all high voltage

to the compressor auxiliary systems such as the oil pump

and liquid injection solenoid. THE EMERGEN CY STOP

BUTTON IS FOR EMERGENCY SHUTDOWN SITU ATIONS

ONLY and MUST NOT BE USED TO ROUTINE LY SHUT

OFF THE COMPRESSOR.

The microprocessor continuously monitors the state of the

battery which maintains setpoints and vari ous other data. If

the battery voltage is low, the message “LOW BATTERY” will

ﬂ ash in the lower right hand corner of the bottom display (see

S70-200 IOM for description of battery backup).

The microprocessor hardware contains an output watchdog

circuit. If the microprocessor should fail, this circuit will disable

(turn off) all outputs.

Operation

RWB II PLUS MICROPROCESSOR CONTROL

OPERATION

S70-200 OM (DEC 99)

Page 4

KEYS AND KEY FUNCTIONS

NOTE: The microprocessor will automatically return to

the main operating display after 60 seconds of keybo ard

nonactivity.

The [CHANGE] key rotates the dual display screen through

six display modes. The [CHANGE] key is also used to change

the status of various setpoints.

The [STEP] key steps or moves a set of ﬂ ashing brackets

through the variable setpoints on the Adjustable setpoints

display, the Auto-cycle display, the Security display and the

Setback display. The setpoint enclosed within the ﬂ ashing

brackets may be changed or updated. The [STEP] key is

also used when the annun ciator display is selected to step

through the annunciator’s four information displays.

NOTE: The [ * ] key is used to step or move the ﬂ ashing

brackets, described above, backwards.

The [ENTER] key is used to enter new setpoint limits.

The [CLEAR] key will reset an alarm or cutout indica tion on

the annunciator screen and will clear the micropro cessor

to allow continued opera tion or restart ing if all conditions

have returned to normal and no other control lockouts are

in force.

The [NUMERIC KEYPAD] is used to introduce new setpoint

limits.

The [+/-] key is used to toggle between pounds per square

inch gauge (g) and inches of mercury (hg).

The [RUN], [STOP], and [REMOTE START] keys control the

starting and stopping of the compressor unit.

The [ALARM SILENCE] key will de-energize the alarm

horn output.

The [AUTO], [REMOTE], and [MANUAL] keys control the

operation of the compressor slide valve and moveable slide

stop.

The [F1] function key will return the operator to the main

operating display. This function may be invoked at any time,

even during setpoint entry.

The [F2] function key will call up the Security display. NOTE:

Press the [F2] key, as prompted by the dis play, to return

to the previously selected display.

The [F3] function key will call up the Setback display.

NOTE: To exit the Setback display, press the [F1] key

as prompted by the display.

The [F4] function key will call up the Auto Cycle display.

NOTE: To exit the Auto Cycle display, press the [F1] key

as prompted by the display.

The [DISPLAY BACKLIGHT] key will toggle the dual LCD

display backlights on and off. A preset delay will shut off the

backlight after ten minutes elapsed time.

The microprocessor has two liquid crystal displays in an 8 line

by 40 character format, for a total of 320 characters. There are

9 different display modes. When power is ﬁ rst applied to the

control panel, the unit will be in the Operat ing display mode.

To change to a different display mode, press the [CHANGE]

key. The display modes in their order of rotation are:

1. Operating display

2. Adjustable Setpoints display

3. Adjustable Setpoints display #2

4. Fixed Setpoints display

5. Annunciator display (4 pages)

6. Shutdown Record display

7. Freeze display

[F1] Operating display

[F2] Security display

[F3] Setback display

[F4] Auto Cycle display

NOTE: On initial powering of the microprocessor, and

any time power has been removed from the micropro-

cessor, only the Operating, Setpoints, Annunciator, and

Shutdown displays will display information. The freeze

display will appear as a dark screen. The Freeze display

will only be pre sent after a compres sor unit cutout and

power has not been interrupted to the microprocessor.

The cutout must be on a safety setpoint. When power is

lost to the micro, it will not show the freeze display.

OPERATING DISPLAY *

OPERATING DISPLAY: Thu 10-01-87 15:33:36

Suction Disch Oil Filter Compressor

20.0 g 180 g 170 g 01PSID MAN Mode

+015 F 140 F 135 F RUNNING

V Ratio S V Pos Pump %FLA Sep 132 F

4.6 090% OFF 080% HTR off

Auto D Auto L FORCED UNLD ALARM

C.C.=20.0 g LOW-BATTERY

*Display for illustrative purposes only.

The Operating display is continuously updated and provides

a variety of information in regard to the current status of the

compressor’s condition and performance.

The information furnished by the Operating display is as

follows:

The DAY, DATE, and TIME are displayed at the top right of

the display.

NOTE: To set day, date, and time; see TO CHANGE THE

ADJUSTABLE SETPOINTS.

SUCTION - Suction Pressure and Temperature are measured

at the compressor inlet and are, respec tively, displayed in

pounds per square inch gauge (g) or inches of mercury (hg)

and degrees Fahren heit.

DISCH - Discharge Pressure and Temperature are measur ed

at the compressor outlet and are, respec tively, dis played

in

pounds per square inch gauge (g) and degrees Fahrenheit.

OIL - Oil Pressure and Temperature are measured prior to

entering the compressor and are, respec tively, displayed in

pounds per square inch gauge (g) and degrees Fahren heit.

FILTER - Pressure drop across the oil ﬁ lter. On the model

676 only, the bearing oil ﬁ lter pressure drop is displayed.

The main oil injection feed ﬁ lter pressure drop is shown on

a unit mounted gauge.

RWB II PLUS MICROPROCESSOR CONTROL

OPERATION

S70-200 OM (DEC 99)

Page 5

NOTE: Consult Motor Manufacturer for the recom-

mended duration of the Recycle Delay.

If the [RUN] key is pushed while

the unit is in Recycle Delay, the

compressor will start at the end of

the delay period.

C.C. - Capacity Control, located at the bottom left of the

display, indicates the current capaci ty control suction pres-

sure setpoint in pounds per square inch gauge (g) or inches

of mercury (hg).

ADJUSTABLE SETPOINTS DISPLAY *

ADJUSTABLE SETPOINTS: ID=[33] [10-01-87]

Cap. Control---[20.0 g ] Thu [15:33:36]

Lo Suct Cutout-[12.0 g ] Baud----[ 2400]

Lo Suct Alarm--[16.0 g ]

Hi Disch Cutout-[225 g ] Aux1[Alarm][NO]

Hi Disch Alarm--[215 g ] Aux2[Shutd][NC]

M.L.C. Stop Load--[095%] CT Factor-[078]

M.L.C. Force Unld-[100%] Recy.Delay-[30]

The Adjustable Setpoints display lists the adjust able set-

points which deﬁ ne the limits of the compressor package

operation. When these limits are reached, or exceeded,

an

alarm or compressor shutdown will occur. The informa

tion

furnished by the Adjustable Set points display is as follows:

CAP CONTROL - The Capacity Control setpoint, re ported

in pounds per square inch gauge (g) or inches of mercury

(hg), controls the loading and unloading of the compres sor

when SV POS is in the automatic (AUTO) mode.

LO SUCT CUTOUT - The Low Suction Pressure Cutout, re-

ported in pounds per square inch gauge (g) or inches of mer-

cury (hg), will shut down the compres sor if the suction pressure

drops to this limit, or lower, for 120 seconds or longer.

LO SUCT ALARM - The Low Suction Pressure Alarm,

reported in pounds per square inch gauge (g) or inches of

mercury (hg), will trigger a prealarm if the suction pressure

drops to this limit, or lower.

HI DISCH CUTOUT - The High Discharge Pressure Cutout,

reported in pounds per square inch gauge (g), will shut

down the compressor if the discharge pressure equals, or

exceeds, this setpoint.

HI DISCH ALARM - The High Discharge Pressure Alarm,

reported in pounds per square inch gauge (g) will trigger

a pre-alarm if the discharge pressure equals, or exceeds,

this setpoint.

M.L.C. STOP LOAD - The Motor Load Control Stop Load,

reported as a percentage of the motor full load amps (FLA),

will prevent the compressor slide valve from loading when

the setpoint is equaled, or exceeded. NOTE: Con sult motor

nameplate for recommended setpoint.

M.L.C. FORCE UNLD - The motor Load Control Force Un-

load, reported as a percentage of the motor full load amps

(FLA), will force the compressor to unload until the motor full

load amps (FLA) fall within 1% of the setpoint, or lower.

NOTE: Consult motor nameplate for recom mended

setpoint.

*Display for illustrative purposes only.

COMPRESSOR - Compressor displays the status of the

compressor unit. The mode of operation will be indicated as

either manual (MAN MODE) when the [RUN] key has been

pressed, automatic (AUTO MODE) when Auto Cycle has

been activated, remote (RMT MODE) when the [REMOTE]

key has been pressed, or off (OFF MODE).

V RATIO - Volume Ratio is the ratio selected by the micropro-

cessor to provide the highest efﬁ ciency at any given suction

and discharge pressure condition. Im mediately below this,

an information space has been provided to indicate whether

V ratio is in the automatic (AUTO) or the manual (MAN)

mode. The microprocessor will control this function only in

the automatic mode. To the right of the mode indicator, two

other messages may appear:

I - Indicates V Ratio increase.

D - Indicates V Ratio decrease.

SV POS - Slide valve position is displayed as a per centage.

This percentage reﬂ ects the mechani cal position of the slide

valve and does not reﬂ ect the percentage of full load opera-

tion. Immediately below this information, space has been pro-

vided to indicate whether SV Pos is in the automatic (AUTO),

manual (MAN), or remote (RMT) mode. The micro processor

will control this function in the auto matic mode. To the right of

the mode indicator, two other messages may appear:

L - Indicates Slide Valve loading.

U - Indicates Slide Valve unloading.

PUMP - Pump displays the current status of the oil pump. The

display will read ON or OFF whenever the HAND-OFF -AUTO

switch is selected to AUTO and the compressor is running.

% FLA - Percent Full Load Amps displays the per centage

of the drive motor full load amperage rating that the motor

is currently using.

SEP - Separator displays the oil separator temper ature in

degrees Fahrenheit.

HTR - Heater displays the condition of the oil separator

heater(s), indicating ON or OFF.

ALARM/CUTOUT - An Alarm or Cutout message indi cates

an Alarm or Cutout setpoint has been reach ed, or ex ceeded.

Rotate the display mode to the Annunciator display for de-

tails. In the event of a cutout, rotate to the Freeze display for

further details.

FORCED UNLD - A Forced Unload message indicates that

the percentage of motor full load amps has exceeded the

maximum limit and the microprocessor is unloading the

compressor until the percentage FLA falls back to normal

limits.

RECYCLE DELAY - A Recycle Delay message indicates that

the compressor has started and has shut down within the

time delay set point period. The Recycle Delay will prevent

the compressor from starting until the delay time expires

and is intended to prevent damage to the com pressor motor

from suc cessive restarts. During Recycle Delay, the micro-

processor will alternatively ﬂ ash “RECYCLE DELAY” and the

remaining delay time in minutes.

RWB II PLUS MICROPROCESSOR CONTROL

OPERATION

S70-200 OM (DEC 99)

Page 6

Cycle Time - Cycle time is the amount of time between the

beginning of each load/unload response. Ten seconds is

the default value. “Cycle Time” is adjustable between 5 and

30 seconds in 5 second intervals. The “Step” key is used

to select a setpoint; then press the “Change” key to toggle

through the selections.

Low % FLA - This setpoint is used to determine if the cou-

pling has broken. 20% is the default value. It is adjustable

from 0 to 100% FLA. Use the “Step” key to select a setpoint;

then enter the desired setpoint and press the “Enter” key.

TO CHANGE THE ADJUSTABLE SETPOINTS:

Adjustable Setpoints are stored in RAM (random access

memory) and are easily changed in the ﬁ eld.

Adjustable Setpoints are lost if

power is interrupted and the battery

is not fully charged. To facilitate

reentry, we suggest that a list of Adjustable Setpoints

be afﬁ xed to one end of the microprocessor cabinet for

reference. For your convenience, a blank Adjust able set-

points display which may be photocopied has been provided

(See page 10).

NOTE: The following procedure also applies to the

changing of the Security, Setback, and Auto Cycle dis-

play setpoints.

1. Press the [CHANGE] key to rotate the display to the

Adjustable Setpoints display.

2. Press the [STEP] key to move or step a set of ﬂ ashing

brackets through the various set points. A setpoint is selected

for change or update when it is enclosed by the ﬂ ashing

brackets.

NOTE: The DAY indicator, itself, will ﬂ ash when selec ted

for change or update.

3. Having selected the setpoint to be changed, the [NU-

MERIC KEYPAD] may be used to enter the new setpoint.

NOTE: All digits must be entered, including zeros. For

example, (01.0).

NOTE: The DAY, AUX 1, and AUX 2 setpoints, once selected,

are changed or updated by pressing the [CHAN GE] key.

NOTE: Certain setpoints may be reported in either pounds

per square inch gauge (g) or inches of mer cury (hg). To

toggle between (g) and (hg), having selected the setpoint,

press the [+/-] key to toggle between (g) and (hg).

4. In the event that an incorrect setpoint is keyed in all or

part, press the [CLEAR] key to restore the original setpoint.

Pressing the [CLEAR] key a second time will eliminate the

ﬂ ashing brackets.

5. Having keyed the desired setpoint, press the [ENTER] key.

The new setpoint will be entered and the ﬂ ashing brackets

will move or step to the next setpoint.

NOTE: A setpoint entry outside the parameters of the

Adjustable Setpoint display will be refused and the

original Adjustable setpoint will be re stored.

NOTE: To clear any time values [STEP] to the desired

setpoint, press [CHANGE] and then press [CLEAR].

*Display for illustrative purposes only.

ID - The ID number is a programmable identiﬁ cation code

used in telecommunications to access a speci ﬁ c compres-

sor.

DATE - The Date displays the current date in the following

format: Month - Day - Year.

DAY - Day will display the current day of the week.

TIME - The Time displays the current time in the following

format: Hours - Minutes - Seconds. The time is in 24:00:00

hour clock format.

BAUD - Shows the baud rate of the RS422 communica tion

ports 1 and 2. Both ports are conﬁ gured as follows: word = 8

bit, parity = none or even, stop = 1 bit. The communications

ports are programmable from 300 to 19200 baud.

AUX 1 and AUX 2 - May be conﬁ gured for either an alarm or

shutdown and with either a normally closed (NC) or normally

open (NO) contact.

CT FACTOR - The Current Transformer Factor records the

proper current transformer factor to match the com pressor

motor FLA rating to the current trans former primary rating.

The CTF factor is program mable and its correct value is

determined by the following formula:

CTF = 1024 x FLA (Full Load Amps)

10 x CT (Current Transformer Primary Amps)

EXAMPLE: FLA = 230 Amps

CT = 300 (300:5)

CTF = 1024x 230 = 78 (Round to whole number)

10 x 300

RECY. DELAY - The Recycle Delay displays the cur rent

recycle delay setpoint in minutes. NOTE: Consult motor

manufacturer for recommended setpoint.

ADJUSTABLE SETPOINTS PAGE 2 *

ADJUSTABLE SETPOINTS Page 2:

Start Diff Press--[100g]

Dead Band--[1.0#]

Prop. Band-[10 %]

Cycle Time-[10 sec]

Low % FLA--[020 %]

Dead Band - This is a + (plus) or - (minus) value above or

below the setpoint at which the compressor will neither

load nor unload. A dead band of 1 is the default value. It

is adjustable between .5 lbs. to 5 lbs. in increments of .5.

The “Step” key is used to select this setpoint; then press the

“Change” key to toggle through the selections.

Proportional Band - This setpoint is used to determine the

amount of time the load/unload solenoid is energized, ac-

cording to how far from the setpoint the actual control pres-

sure is. The smaller the number, the longer a load/unload

signal will be sent. 10% is the default value. Selections are

2, 5, 10, 15, 20, or 25%. The “Step” key is used to select

this setpoint; then press the “Change” key to toggle through

the selections.

RWB II PLUS MICROPROCESSOR CONTROL

OPERATION

S70-200 OM (DEC 99)

Page 7

HOW TO DETERMINE

ADJUSTABLE SETPOINTS:

Adjustable Setpoints should reﬂ ect values compat ible with

normal system operation. Too high a Low Suction Pres sure

Alarm setpoint may cause nuisance prealarms. Similarly,

cutout setpoints should not fall within what are considered

normal plant oper ation. As a rule of thumb, set the Low Suc-

tion Pressure Alarm 5 PSIG lower than the lowest normal

suction pressure. The Low Suction Pressure Cutout should

be 5 to 10 PSIG lower than the Low Suction Pressure Alarm

setpoint.

The High Discharge Pressure Cutout should be set at 90%

of the setting of the lowest high side relief valve. The High

Discharge

Pressure Alarm should be set 10 PSIG lower than

the Cutout.

The Capacity Control setpoint should be the equi valent of

the normal suction condition.

FIXED SETPOINTS DISPLAY *

FIXED SETPOINTS: HIGH STAGE PRELUBE

OIL PUMP PGM/A

Hi Disch Cut----[212F]

Hi Disch Alarm--[194F] Liq Inj Con 113F

Hi Oil Temp Cut-[167F] Filter------[25]

Hi Oil Temp Alarm[158F]Oil Heater[113F]

Lo Oil Temp Cut--[49F] Lo Oil Cut-[030]

Lo Oil Temp Alarm[58F] Lo Oil Alrm[025]

The Fixed Setpoints display lists all ﬁ xed set points, program

version, plus low oil alarm and low oil cutout setpoints.

Fixed Setpoints deﬁ ne the limits of acceptable compressor

operation. Fixed Setpoints are factory determined, stored in

programmed memory (PROM), and will remain in memory

if power to the micro processor is interrupted.

HI DISCH CUT - The High Discharge Temperature Cutout,

reported in degrees Fahrenheit, will shut down the com-

pressor if the discharge temperature equals or exceeds this

setpoint.

HI DISCH ALARM - The High Discharge Temperature Alarm,

reported in degrees Fahrenheit, will trig ger a prealarm if the

discharge temperature equals or exceeds this setpoint.

HI OIL TEMP CUT - The High Oil Temperature Cutout, re-

ported in degrees Fahrenheit, will shut down the com pressor

if the oil temperature equals or ex ceeds this setpoint.

HI OIL TEMP ALARM - The High Oil Temperature Alarm,

reported in degrees Fahrenheit, will trig ger a prealarm if the

oil temperature equals or exceeds this setpoint.

LOW OIL TEMP CUT - The Low Oil Temperature Cutout,

reported in degrees Fahrenheit, will shut down the com-

pressor if the separator oil temperature equals or falls below

this setpoint.

LOW OIL TEMP ALARM - The Low Oil Temperature Alarm,

reported in degrees Fahrenheit, will trig ger a prealarm if

the separator oil temperature equals or falls below this

setpoint.

HIGH STAGE or BOOSTER - Compressor application

indicator.

*Display for illustrative purposes only.

PRELUBE, FULL LUBE, or CYCLING - Pump type will be

indicated.

PGM/ - Microprocessor Program version.

LIQ INJ CON - The Liquid Injection Control, re ported in

degrees Fahrenheit, will shut off the liquid refrigerant sup-

ply to the compressor if the oil temperature equals or falls

below this set point.

FILTER - The Oil Filter setpoint will trigger an alarm when the

differential pressure across the oil ﬁ lter equals or exceeds 25

pounds per square inch (PSI) for 15 seconds, or longer.

OIL HEATER - The Oil Heater setpoint, reported in degrees

Fahrenheit, turns on the oil separator heater(s) when the oil

temperature equals or falls below this setpoint whenever the

compressor is NOT running.

Compressor Differential Cutout - The differential cutout

has been lowered from 55 lb to 25 lb. Cutout will occur after

ﬁ ve minutes. To allow operation at low differential pressures,

the micro will take the following steps:

A. Force unload the compressor to 50% and display an "F

Unload" when the oil pressure is within 10 lb of the main oil

injection port pressure and the slide valve position is greater

than 50%.

B. Prohibit the compressor from loading and display a "Ld

Inhib" message when the differential is within 15 lb of the

main oil injection port pressure.

Oil Pressure Alarm and cutout - Logic has been revised

to same logic as currently used on RXB/RXF. The new logic

is as follows:

Prelube and Cycling Oil Pump version when pump is not run-

ning. Alarm will occur if oil pressure is 25 lb below discharge

pressure or within 10 lb of suction pressure for 30 seconds.

Cutout occurs if oil pressure is 30 lb below discharge pres-

sure or if oil pressure is within 7 lb of suction pressure for 10

seconds and alarm has already been set.

Full Lube and Cycling Oil Pump version when oil pump is run-

ning. Alarm occurs if oil pressure is within 10 lb of discharge

pressure for 30 seconds. Cutout occurs when oil pressure

is within 5 lb of discharge pressure for 10 seconds and oil

pressure alarm has been set.

Cycling Oil Pump Control - The oil pump will cut off when

differential pressure between suction and discharge pressure

is 55 lb or greater. Upon pump termination the above cutout

logic (pump not running) is utilized. Pump cut-in occurs when

the differential pressure between suction and discharge is 45

lb or less. Oil pressure alarm and cutout logic (pump running)

begins after a 30 second delay which allows the oil pump

to build pressure.

RWB II PLUS MICROPROCESSOR CONTROL

OPERATION

S70-200 OM (DEC 99)

Page 8

When a prealarm or cutout occurs, a ﬂ ashing ALARM or

CUTOUT indicator will appear in the lower right hand corner

of the Operating display. To determine the fault, rotate to the

Annunciator display by pres sing the [CHANGE] key.

The Annunciator display lists all key operative points on four

sequential displays. These displays can be rotated from page

#1 through page #4 by pres sing the [STEP] key. When a

prealarm or cutout is triggered, the pertinent point will ﬂ ash,

and the time of the occurrence will be recorded to the right

of the alarm. Prealarms are self- clear ing. At this time the

alarm will stop ﬂ ashing, but the time of the ﬁ rst occurrence

will still be recorded to the right of the alarm. Pressing the

[CLEAR] key while at the Annunciator display will clear all

alarms and/or cutouts.

In order to restore the Annunciator display and resume

normal operation it will be necessary to go through the fol-

lowing steps:

1. Correct the conditions causing the alarm.

2. Press the [ALARM SILENCE] key. (This action may pre-

cede correcting the conditions causing the alarm).

3. To clear or reset the Annunciator pages, press the

[CLEAR] key. This will also clear the ALARM or CUTO UT

indicator from the Operating display.

4. Press [F1] to call up the Operating dis play. If the condi-

tions causing the alarm have not been cor rect ed or a new

fault has occurred, a new ALARM or CUTOUT message

will appear.

NOTE: Use of the Emergency Stop Button may trip one

or more alarm setpoints.

SHUTDOWN RECORD DISPLAY *

SHUTDOWN RECORD: Thu 10-01-87 15:33:36

(Use STEP key to advance PAGE)

Hi Oil Temp Cutout Wed 09-30-87 16:22:54

Comp Auxiliary Sat 08-22-87 09:47:02

Low Temp Cutout Thu 08-20-87 11:17:33

Pump Auxiliary Mon 08-17-87 18:53:11

Disch. Temp Cutout Tue 07-14-87 06:22:09

Oil Pres Cutout Fri 07-08-87 14:06:21

The Shutdown Record display keeps a record of the last six

shutdowns (cutouts). This information will help troubles hoot

persistent operational problems. The most recent cutout will

appear on the top line of the display with the oldest ap pearing

on the last or bottom line. When a cutout occurs, all informa-

tion is moved down one line and the new cutout appears at

the top. When the dis play is full, the oldest record is dropped

off the display and is not retained in memory. The informa tion

presented is echoed from the Annunciator display; providing

the type of cutout, the day, the date, and the time. NOTE: This

information will not be lost due to power failure.

FREEZE DISPLAY *

FREEZE DISPLAY: Thu 10-01-87 15:33:36

Suction Disch Oil Filter Compressor

20.0 g 225 g 170 g 01PSID OFF Mode

+015 F 140 F 135 F RECYCLE

V Ratio S V Pos Pump %FLA Sep 132 F

4.6 090% OFF 080% HTR off

Auto Auto CUTOUT

C.C.=20.0 g

The Freeze display has the same appearance and con tains

the same information as the Operating display. (For a de-

scription of the information presented by the Freeze display,

refer to the Operating display.) The Freeze display freezes

the information of the Operating display AT THE MOMENT

OF A COMPRESSOR CUTOUT. The informa tion on the

Freeze display can help the operator to identify the cause

of a fault which occurred when no one was present. The

Freeze display will retain the information generated by a

cutout until a new cutout occurs or power is removed from

the micro processor.

Do not confuse the Freeze display

with the Operating display. In order

to avoid confusion remember that

the displayed information on the Operating display is

constantly being updated and changed. The Freeze dis-

play is ﬁ xed and FREEZE DISPLAY appears in the upper

left hand corner of the display.

NOTE: The Freeze display will appear as a blank screen

when power is initially furnished to the unit, and it will

return to a blank screen anytime power is removed from

the microproce ssor.

*Display for illustrative purposes only.

ANNUNCIATOR DISPLAY *

ANNUNCIATOR: PG-1 Thu 10-01-87 15:33:36

(Use STEP key to advance PAGE)

High Press. Cutout *********************

High Press. Alarm *********************

Low Press. Cutout *********************

Low Press. Alarm *********************

Oil Press. Cutout *********************

Oil Press. Alarm *********************

ANNUNCIATOR: PG-2 Thu 10-01-87 15:33:36

(Use STEP key to advance PAGE)

Hi Oil Temp Cutout *********************

Hi Oil Temp Alarm *********************

Low Temp Cutout *********************

Low Temp Alarm *********************

Disch. Temp Cutout *********************

Disch. Temp Alarm *********************

ANNUNCIATOR: PG-3 Thu 10-01-87 15:33:36

(Use STEP key to advance PAGE)

Comp. Auxiliary *********************

Pump Auxiliary *********************

Oil Level *********************

Comp. Differential *********************

Dirty Filter *********************

ANNUNCIATOR: PG-4 Thu 10-01-87 15:33:36

(Use STEP key to advance PAGE)

Aux. 1 (Alarm) *********************

Aux. 2 (Shutdown) *********************

Low Motor Amps

Sensor Fault

RWB II PLUS MICROPROCESSOR CONTROL

OPERATION

S70-200 OM (DEC 99)

Page 9

*Display for illustrative purposes only.

SECURITY DISPLAY *

SECURITY DISPLAY: Thu 10-01-87 15:33:36

Setpoints Access---[Enabled ] Keyboard

Enter Access Code---[*****]

Press F2 To Exit

The [F2] function key will call up the Security display. The

Security display allows the operator to either enable or dis-

able the microprocessor’s keyboard and, thereby, prevent

unauthorized tam pering with the various adjustable setpoints.

When enabled, the microprocessor keyboard is fully opera-

tive and the security lockout is not in ef fect. When disabled,

the keyboard is rendered partially nonfunc tional. All displays

will still be accessible through the keyboard. If any attempt

is made to enter new adjustable setpoints, how ever, the

microprocessor will default to the Se curity display.

TO ENABLE THE KEYBOARD, press the [STEP] key so that

the brackets beside Enter Access Code ﬂ ash, key the proper

ﬁ ve digit access code, and press [ENTER]. The Setpoints

Access will toggle from disabled to enabled and adjustable

set point entry is now possible.

TO DISABLE THE KEYBOARD, press the [F2] function

key to call up the Security display. Press the [STEP] key

until the brackets beside Enter Access Code ﬂ ash, key the

proper ﬁ ve digit access code, and press [ENTER]. Now,

press the [STEP] key until the brackets beside Setpoints

Access ﬂ ash and press the [CHANGE] key to toggle from

enabled to disabled.

TO CHANGE THE ACCESS CODE, press the [F2] function

key to call up the Security display. Press the [STEP] key until

the brackets beside Enter Access Code ﬂ ash, key the proper

ﬁ ve digit access code, and press [ENTER]. Now, select the

Enter Access Code a second time by pressing the [STEP]

key until the brackets beside Setpoints Access ﬂ ash, key in

the new ﬁ ve digit access code, and press [ENTER].

NOTE: Power loss will not effect the Security display.

NOTE: IF NO ACCESS CODE WAS ENTERED AND THE

DIS ABLED COMMAND WAS SELECTED, THE ACCESS

CODE IS [00000].

LOST OR FORGOTTEN ACCESS CODE: Consult Frick

Com pany for assistance.

SETBACK DISPLAY *

SETBACK DISPLAY: Thu 10-01-87 15:33:36

Press F1 To Exit

Setback Setpoint-[05.0 g ] Active-[No ]

Start Stop Start Stop

Mon-[--:--]-[06:00] Fri-[16:00]-[--:--]

Tue-[--:--]-[--:--] Sat-[--:--]-[--:--]

Wed-[--:--]-[--:--] Sun-[--:--]-[--:--]

Thu-[--:--]-[--:--]

The [F3] function key will call up the Setback display. The

Setback feature enables automatic operation at two separate

suction conditions on a preset time schedule. Having entered

the desired Setback setpoint, enter the start and stop time

or times, and select Active: (Yes) or (No).

NOTE: To change the Setback setpoints, refer to “TO

CHANGE THE ADJUSTABLE SETPOINTS”

AUTO CYCLE DISPLAY *

AUTO CYCLE Thu 10-01-87 16:33:36

DISPLAY: Press F1 To Exit

Suction Pressure--------[20.0 g ]

Compressor Start--------[20.0 g ]

Compressor Stop---------[18.0 hg]

Minimum Slide Valve-----[00%]

Auto Cycle Active-------[No ]

The Auto Cycle display provides for independently adjus table

setpoints to turn the compressor on and off in response to

the suction pressure or as an adjustable setpoint to limit the

minimum slide valve position.

NOTE: To change the Auto Cycle setpoints, refer to

“TO CHANGE THE ADJUSTABLE SETPOINTS”

SUCTION PRESSURE - Constantly monitors and dis plays

the suction pressure in pounds per square inch gauge (g)

or inches of mercury (hg).

COMPRESSOR START - Compressor Start-up will bring

the compressor back on line when the suction pres sure rises

to the displayed setpoint.

COMPRESSOR STOP - Compressor Stop will shut down the

unit if the suction pressure drops to or below the displayed

setpoint limit. NOTE: This limit must be set higher than Low

Suction Pressure Cut out and the Low Suction Pressure

Alarm setpoints.

MINIMUM SLIDE VALVE - Minimum Slide Valve Posi tion,

shown as a percentage, will limit the slide valve position to

the displayed setpoint.

AUTO CYCLE ACTIVE - Indicates whether Auto Cycle is ac-

tive (YES) or not active (NO). Press the [CHANGE] key while

at this setpoint to change the status. Upon deactiva tion, the

compressor will return to the previous mode of operation.

ANALOG OFFSET DISPLAY*

ANALOG OFFSET:

Suc Disch Oil Sep Filt Spare Econ

Temp +0 +0 +0 +0 +0.0

Pres +0.0 +0 +0 +0 +0

Channel 10 12 13

Press +0 +0 0

The Analog Offset Display is accessed by pressing +/- key.

All analog values can be offset + or - 3 to 9 units depend-

ing on which value is being adjusted. Use the [STEP] key

to step to the desired setpoint. Press the [CHANGE] key to

change the value of the offset by 1. The actual analog value

will be displayed on the top line of the display. The “Econ”

and channels 10, 12, 13 are displayed but do not pertain to

the standard program.

RWB II PLUS MICROPROCESSOR CONTROL

OPERATION

S70-200 OM (DEC 99)

Page 10

Sensor Fault Failure - A “Sensor Fault” cutout was added

to the program to stop the compressor if a temperature or

pressure sensor is at its minimum or maximum limit for 5

seconds. The following channels and conditions will cause

this cutout:

Channel 1 - Suction Temp Low or High (-67 to 113

O

F)

Channel 2 - Low or High Discharge Temp (32 or 212

O

F)

Channel 3 - Low or High Oil Temp (0 or 180

O

F)

Channel 4 - Low or High Separator Temp (0 or 180

O

F)

Channel 6 - Low or High Oil Pressure (<0 g or 285 g)

Channel 8 -

Low or High Discharge Pressure (<0 g or 285 g)

Channel 9 - Low Suction Pressure (29 hg only)

Pulse Load Signal at 100% Slide Valve Position - This

new feature will stop loading the compressor when 100%

slide valve is displayed. The load signal will pulse for 2 sec-

onds every minute when the slide valve is at 100% and the

pressure is above setpoint.

TEMPERATURE-PRESSURE CONTROL

PROGRAM (OPTION)

NOTE: The following displays are provided only when

the Temperature-Pressure Control Program option has

been ordered with the RWB II Plus Rotary Screw Com-

pressor Unit.

SETPOINTS DISPLAY PAGE 1 *

SETPOINTS PAGE 1 Capacity Control=Press

C.C. CUTOUT ALARM PB DB CT

Press 25.3g 01.3g 05.3g 10 1.0 10

Temp +40.0F +32.0F +33.0F 10 0.5 10

offset-act

Sup Heat-Alarm-10F-no

Sep Cond-Alarm-10F-no

* Display for illustrative purposes only.

The Setpoints Display is accessed by pressing the

[CHANGE] key.

CONTROL - This setpoint is used to select either Pressure

Capacity Control or Temperature Capacity Control. NOTE:

There are only two setpoints, press for pressure capacity

control and temp for temperature capacity control.

CC - The capacity control setpoint is for normal operation,

not setback.

CUTOUT -This setpoint will stop the compressor if the suction

pressure drops below the pressure setpoint for 90 seconds or

if the CC Temperature drops below the temperature setpoint.

There is no time delay on the temperature cutout.

ALARM - An alarm will be activated if the suction pressure

drops below the pressure setpoint or if the CC Temperature

drops below the temperature setpoint. There is no time delay

for either.

PB - The Proportional Band (PB) is used to determine the

amount of time the load/unload solenoid is energized, ac-

cording to how far away from the setpoint the actual control

pressure or temperature is. The smaller the number, the

more load/unload will be sent. A PB of 10% is default. It is

adjustable to 2, 5, 10, 15, 20, or 25 percent.

DB - The Dead Band (DB) is a + (plus) or - (minus) value

above or below the setpoint which the compressor will neither

load nor unload. It is adjustable between .5 and 5.0 psig or

degrees, in increments of .5 units.

CT - The Cycle Time (CT) setpoint is the amount of time

between the beginning of each load/unload response. It is

adjustable to 5, 10, 15, 20, 25, or 30 seconds.

Use the [STEP] key to step to the desired setpoint, then press

the [CHANGE] key to change the CC, PB, DB and CT values.

Enter the desire value for the remaining setpoints and press

[ENTER] when complete.

ADJUSTABLE SETPOINTS FORM

ADJUSTABLE SETPOINTS: ID = [ ] [ - - ]

Cap. Control ———[ ] Thu [ : : ]

Lo Suct Cutout ——[ ] Baud ———————[ ]

Lo Suct Alarm ———[ ]

Hi Disch Cutout ——[ ] Aux 1 [ ] [ ]

Hi Disch Alarm ——[ ] Aux 2 [ ] [ ]

M.L.C. Stop Load —[ ] CT Factor ———[ ]

M.L.C. Force Unld —[ ] Recy. Delay ——[ ]

Photocopy and ﬁ ll in applicable data for your unit. Retain for reference if reentry is required.

RWB II PLUS MICROPROCESSOR CONTROL

OPERATION

S70-200 OM (DEC 99)

Page 11

TEMPERATURE-PRESSURE CONTROL

PROGRAM (OPTION) (continued)

The new setpoints provided on this display allow monitoring

of compressor superheat and condensing in the separator.

The following setpoints apply to the monitoring of the super-

heat and condensing in the separator.

ALARM/(SHUTDOWN) -The Alarm/(shutdown) setpoints

select the conditions for an alarm or shutdown. If alarm is

selected, the alarm will occur after a 30 second delay. If

shutdown is selected, the shutdown will occur 60 seconds

after the alarm.

OFFSET - This setpoint is the degrees F above the satura-

tion point temperature where the alarm or shutdown will

occur.

ACT - The function selects whether the alarm/shutdown is

activated or not.

Use the [STEP] key to step to the desired setpoint, then press

the [CHANGE] key to change the setpoint. Press [ENTER]

when all desired setpoint changes have been made.

SETBACK DISPLAY *

SETBACK DISPLAY: Tue 04-10-90 08:44:50

Press Setpoint-[25.3g ] F1 To Exit

Temp Setpoint—[+50.0F] Active-[No ]

Stop Start Start Stop

Mon-[—:—}-[—:—] Fri-[—:—]-[—:—]

Tue-[—:—}-[—:—] Sat-[—:—]-[—:—]

Wed-[—:—}-[—:—] Sun-[—:—]-[—:—]

Thu-[—:—}-[—:—]

The Setback Display is accessed by pressing the [F3] key.

PRESS SETPOINT - The capacity control setpoint used

when in the Setback mode and Pressure is selected as the

capacity control desired.

TEMP SETPOINT - The capacity control setpoint used when

in the Setback mode and Temperature is selected as the

capacity control desired.

NOTE: To change the Setback setpoints, refer to “TO

CHANGE THE ADJUSTABLE SETPOINTS”.

The Auto Cycle display provides for independently adjus table

setpoints to turn the compressor on and off in response to

the suction pressure or as an adjustable setpoint to limit the

minimum slide valve position. The compressor can be started

and stopped by the following pressure setpoints even if the

capacity control is selected to temperature.

AUTO CYCLE PRESS CONTROL DISPLAY *

AUTO CYCLE PRESS Tue 04-10-90 08:44:57

DISPLAY: Press F1 To Exit

Suction Pressure--------[06.5 g ]

Comp Start - [99.0 g } Timer—[00 min]

Comp Stop— [29.0 hg] Timer—[00 min]

Min SV———[50%]

Active———[No ] * for Temp Menu

NOTE: To change the Auto Cycle setpoints, refer to “TO

CHANGE THE ADJUSTABLE SETPOINTS”

SUCTION PRESSURE - Constantly monitors and dis plays

the suction pressure in pounds per square inch gauge (g)

or inches of mercury (hg).

COMP START - The suction pressure must be greater than

or equal to the “START” setpoint in order to start the com-

pressor. This setpoint works in conjunction with the “TIMER”

setpoint located to the right of it on the display.

TIMER - This is a time delay used to start the compressor.

The timer only accumulates time whenever the pressure

rises to or above the “START” setpoint and will reset if the

pressure drops below the “START” setpoint.

COMP STOP - Compressor Stop will shut down the unit if

the suction pressure drops to or below the displayed “STOP”

setpoint limit. This setpoint works in conjunction with the

“TIMER” setpoint located to the right of it on the display.

NOTE: This limit must be set higher than Low Suction

Pressure Cut out and the Low Suction Pressure Alarm

setpoints.

(STOP) TIMER - The (stop) TIMER is a time delay used

to stop the compressor. The timer only accumulates time

whenever the pressure drops to or below the “STOP” set-

point and will reset if the pressure rises above the “STOP”

setpoint.

MINIMUM SLIDE VALVE - Minimum Slide Valve Posi tion,

shown as a percentage, will limit the slide valve position to

the displayed setpoint.

ACTIVE - Indicates whether Auto Cycle is active or not.

Press the [CHANGE] key while at this setpoint to change

the status. Upon deactiva tion, the compressor will return to

the previous mode of operation.

AUTO CYCLE TEMP CONTROL DISPLAY *

AUTO CYCLE TEMP Tue 04-10-90 08:45:40

DISPLAY: Press F1 To Exit

Cap Control Temperature—[+50.5 F]

Comp Start-[+50.0 F] Timer—[01 min]

Comp Stop—[+20.0 F] Timer—[01 min]

Min SV——[50%]

Active——[Yes] * for Press Menu

The Auto Cycle Temperature Control Display is accessed by

pressing F4 and then the * keys. NOTE: The compressor

can be started and stopped by the following tempera-

ture setpoints even if the capacity control is selected

to pressure.

CAP CONTROL TEMPERATURE - Constantly monitors and

dis plays the suction temperature.

COMP START - The CC (capacity control) Temperature

must be greater than or equal to the “START” setpoint in

order to start the compressor. This setpoint works in con-

junction with the “TIMER” setpoint located to the right of it

on the display.

(Start) TIMER - This is a time delay used to start the compres-

sor. The timer only accumulates time whenever the CC Tem-

perature rises to or above the “START” setpoint and will reset

if the CC Temperature drops below the “START” setpoint.

*Display for illustrative purposes only.

RWB II PLUS MICROPROCESSOR CONTROL

OPERATION

S70-200 OM (DEC 99)

Page 12

COMP STOP - The CC Temperature must be less than or

equal to the “STOP” setpoint in order to stop the compressor.

This setpoint works in conjunction with the “TIMER” setpoint

located to the right of it on the display.

(STOP) TIMER - The (stop) TIMER is a time delay used

to stop the compressor. The timer only accumulates time

whenever the CC Temperature drops to or below the “STOP”

setpoint and will reset if the CC Temperature rises above the

“STOP” setpoint.

MINIMUM SLIDE VALVE - Minimum Slide Valve Posi tion,

shown as a percentage, will limit the slide valve position to

the displayed setpoint.

ACTIVE - Indicates whether Auto Cycle is active or not.

Press the [CHANGE] key while at this setpoint to change

the status. Upon deactivation, the compressor will return to

the previous mode of operation.

LEAD-LAG OPTION

The lead-lag compressor sequencing option provides the

controls for operating two RWB II compressors in one

system.

AUTO CYCLE DISPLAY *

AUTO CYCLE Tue 04-10-90 08:44:57

DISPLAY: Press F1 To Exit

Suction Pressure--------[06.5 g ]

Comp Start - [99.0 g } Timer—[00 min]

Comp Stop— [29.0 hg] Timer—[00 min]

Min SV———[50%] Lead—[YES]

Active———[No ]

*Display for illustrative purposes only.

The software includes user adjustable setpoints on the Auto

Cycle setpoints screen (F4 on Main Menu) for the following:

START - The suction pressure must be greater than or equal

to the “START” setpoint in order to start the compressor. This

setpoint works in conjunction with the “Timer” setpoint located

to the right of it on the Auto Cycle setpoints screen.

TIMER - This is a time delay used to start the compressor.

The timer only accumulates time whenever the pressure

rises to or above the “START” setpoint and will reset if the

pressure drops below the “START” setpoint.

STOP - The suction pressure must be less than or equal to

the “STOP” setpoint in order to stop the compressor. This

setpoint works in conjunction with the “Timer” setpoint located

to the right of it on the Auto Cycle setpoints screen.

TIMER - This is a time delay used to stop the compressor.

The timer only accumulates time whenever the pressure

drops to or below the “STOP” setpoint and will reset if the

pressure rises above the “STOP” setpoint.

MIN SV -This setpoint is the minimum slide valve position,

shown as a percentage, it will limit the slide valve position

to the displayed setpoint.

LEAD - This setpoint assigns the compressor as the lead or

the lag unit. Press the [CHANGE] key while at this setpoint

to change the status.

ACTIVE - This setpoint indicates whether the Auto Cycle

Mode is active or not. Press the [CHANGE] key while at this

setpoint to change the status.

OPERATION

For operation of the LEAD-LAG sequence, both units must

be in Auto Cycle compressor mode, one compressor micro

selected as the LEAD compressor, the other compressor

selected as the LAG compressor and the slide valves in

Auto mode.

With NO Compressor Running

The lead will start when its “START” setpoint is reached for

the amount of time selected for the “TIME” setpoint.

With ONE Compressor Running

If the load rises:

The lag compressor will start when its “START” setpoint

is reached for the amount of time selected for the “TIME”

setpoint and the lead compressor is running at 100% slide

valve or running with the motor load inhibit or lead cutout or

lead in recycle.

If the load falls:

The lead compressor will stop when its “STOP” setpoint

is reached for the amount of time selected for the “TIME”

setpoint.

With TWO Compressors Running

If the load rises:

The lead and lag compressor will load independently.

If the load falls:

The lag compressor will unload to its “MIN SV” setpoint. Then

the lead compressor will unload to its “MIN SV” setpoint. The

lag compressor will stop when the suction pressure drops

below the “STOP” setpoint for the amount of time selected

for the “TIME” setpoint.

NOTE: Be careful not to select both compressors as

lead compressors or as lag compressors as improper

operation will result.

NOTE: One compressor will operate as a normal auto

cycle compressor when any one of the following oc-

curs:

a. Power is removed from one of the two compressors,

b. Either of the compressors is NOT selected to “AUTO”,

or

c. If communications is lost between the compressors for

any reason.

RWB II PLUS MICROPROCESSOR CONTROL

OPERATION

S70-200 OM (DEC 99)

Page 13

COMMUNICATIONS TROUBLESHOOTING

Troubleshooting the communications:

Go to the FIXED SETPOINTS PAGE by using the “CHANGE”

key and the “ * ” key. The display will appear as:

FIXED SETPOINTS DISPLAY *

FIXED SETPOINTS: HIGH STAGE PRELUBE

COMM ACTIVITY—[ ] OIL PUMP PGM/A

Hi Disch Cut----[212F]

Hi Disch Alarm--[194F] Liq Inj Con 113F

Hi Oil Temp Cut-[167F] Filter------[25]

Hi Oil Temp Alarm[158F]Oil Heater[113F]

Lo Oil Temp Cut--[49F] Lo Oil Cut-[030]

Lo Oil Temp Alarm[58F] Lo Oil Alrm[025]

If the microprocessor is receiving information in the com-

munications port from the other compressor, a “2” will ﬂ ash

between the brackets. During normal operation a “2” will ﬂ ash

every 5 seconds.

At the same time information is display on the lower right

hand corner of the Auto Cycle display concerning the lead-

lag information:

AUTO CYCLE DISPLAY *

AUTO CYCLE Tue 04-10-90 08:44:57

DISPLAY: Press F1 To Exit

Suction Pressure--------[06.5 g ]

Comp Start - [99.0 g } Timer—[00 min]

Comp Stop— [29.0 hg] Timer—[00 min]

Min SV———[50%] Lead—[YES]

Active———[No ] 0111 111

This information is either “0” or “1” and represents what is be-

ing sent from the other compressor. Consult Frick Company

if additional information is required.

HOW THE MICROPROCESSOR WORKS

- SUMMARY -

The Frick microprocessor has 4 major components and a va-

riety of sensors. The major components are the SBC (single

board computer), two display screens, and the keyboard.

The SBC can be considered the brain of the micro proces sor

control console. The SBC contains the logic center which

provides the rules by which the micro pro cessor will oper-

ate, the integrated cir cuit chips which store the burned-in

memory of how the compres sor unit is to behave, an analog

input to convert VDC from the various sensors into computer

binary language, and RAM (random access memory) inte-

grated circuit chips to store information which can be readily

changed by the microprocessor or, as in the case of adjust-

able setpoints, by the operator. The SBC collects information,

processes the information, and delivers instructions to the

displays and to the output modules.

The SBC gathers information from several sources on the

compressor unit. Pressure transducers sense changes in

pressure and return a variable DC volt age of 1 to 5 VDC to

the SBC. The signals are converted into binary code which

the microproces sor under stands. The microproces sor scans

the incoming data many times per second and compares

the information it receives with the instructions programmed

in the PROM chips, information stored in the RAM chips,

and instructions it has received from the console keyboard.

As operating conditions change, the microprocessor also

forwards the infor mation it is receiving to the display screen.

When an operating condition or conditions develop which

the micropro cessor program identiﬁ es as requiring a speciﬁ c

action, the microprocessor generates an instruction which is

forwarded to the output mod ules. The instruction triggers a

solid state out put device capable of handling control voltage

and the instruc tion is executed. In some cases, such as load

and unload instructions, the computer dis plays the instruction

on the Operating display with an L (load) or U (unload) symbol

at the same time as the appropriate output is energized.

If the microprocessor receives information that indicates an

abnormal operating condition has been reached or is present,

it will generate one or more of the following instructions:

1. If a subsystem on the compressor unit, such as the oil

heater(s) or liquid injection, can correct the problem, the

microprocessor will energize or deenergize this system.

2. If a prealarm setpoint has been reached the micro processor

will trigger the prealarm and display this information on the

Operating dis play and the Annunciator display.

3. If a cutout setpoint has been reached, the microprocessor

will shut down the compressor. The microprocessor will indi-

cate CUTOUT on the Operating dis play and the information

present on the Operating display at the moment of cutout

will be stored and can be retrieved by rotating displays to

the Freeze display. Additional information will be available

through the Annunciator and Shutdown Record displays.

* Display for illustrative purposes only.

ARE ON THE SAME SKID

WIRED AT FRICK IF BOTH UNITS

DE-9P DE-9P

ON BOTH CONNECTORS

JUMPER PIN 1 TO 6 AND 2 TO 7

SBCSBC

WIRING FOR LEAD-LAG SEQUENCING

WITH DBCH-9 HOOD (2 THUS)

CONNECTORS-#DE-9P MALE

FROM ALL OTHER WIRING

RS 422 WIRING SHALL BE SEPARATE

COLOR CODING SHOWN IS BELDEN #8777

USE BELDEN #8777 OR EQUAL (3 TWISTED PAIRS)

BLK

RED

BLK

GRN

4

5

8

9

33

9

8

5

4

+RX +RX

+TX +TX

-RX -RX

-TX -TX

COM COM

UNIT "B"

PORT 2

RS422

UNIT "A"

PORT 2

RS422

OPTIONAL

NOTE: WHEN USING THE RS422 PORTS FOR LEAD-LAG, THEY

CANNOT BE USED FOR ANY OTHER COMMUNICATIONS.

RWB II PLUS MICROPROCESSOR CONTROL

OPERATION

S70-200 OM (DEC 99)

Page 14

A typical example of how the microprocessor re sponds can

be illustrated by the responses gener ated by the micro-

processor as oil temperature increases. Assume that the

ambient temperature and compressor unit temperature are

45°F and you have just pressed the [RUN] key to start the

compressor unit:

AT 45° F.

The microprocessor receives information that the oil tempera-

ture is below 49

O

F, the Low Oil Temperature Cutout setpoint,

and and shuts down the unit. The micropro cessor will prevent

the compressor package from running. The microproces sor

also instructs the oil heater(s) output to ener gize the oil

heater(s).

AT 50° F.

When the oil temperature reached 50

O

F the micropro cessor

would allow the Low Oil Temperature Cutout to be cleared and

the compressor unit could now be started. (Assume that the

[RUN] key has been pressed and that the com pressor has

now started.) The Low Oil Temperature Alarm would still be

engaged and cannot be cleared until oil temperature exceeds

58

O

F. The oil heater(s) shut off on compressor start.

AT 113° F

The microprocessor instructs the liquid-injection solenoid

output to deenergize the liquid-injection solenoid.

AT 122° F

The microprocessor instructs the liquid-injection solenoid

output to energize.

AT 110° F TO 150° F.

Normal operating range. The microprocessor contin ues

monitoring oil temperature and reporting this informa tion on

the Operating display.

AT 158° F.

The microprocessor triggers the High Oil Temperature Alarm

and displays the alarm on the Operating display and the

Annunciator display.

AT 167° F.

The microprocessor instructs the compressor motor to shut

down and displays a CUTOUT indication on the Operating

display. It stores the operating conditions at the moment of

cutout in the Freeze display. Informa tion regarding the cutout

will also be retained by the Annun ciator and the Shutdown

Record displays.

NOTE: If the operator makes an error by at tempting to

start the compressor under condi tions outside safe

normal operating conditions, the micropro cessor will

prevent start-up and ad vise the operator of the fault.

MULTIPLE COMPRESSOR SEQUENCING

FOR RWB II COMPRESSOR UNITS WITH

MICROPROCESSOR CONTROLS

A - The standard microprocessor panel includes:

1. Remote Run Input

2. Remote Load Input

3. Remote Unload Input

The remote run input is only recognized when the remote

run mode has been selected by pressing the “remote start”

key on the front panel of the micropro cessor.

The remote load and unload inputs can only be recog nized

when the “remote” key in the slide valve column on the front

panel of the microprocessor has been pressed.

B - If master sequencing between multiple compressors in

parallel on a common suction is desired. This output data

will permit the compres sor microproc essor to be interfaced

with a master sequence controller. See electri cal diagram

for details.

SUGGESTED PROGRAMMABLE

CONTROLLER PROGRAM TO DECODE

MICROPROCESSOR OUTPUT DATA CODES

RWB II PLUS MICROPROCESSOR CONTROL

OPERATION

S70-200 OM (DEC 99)

Page 15

OUTPUT NO.

TERMINAL NO.

MNEMONIC

Compressor Off

Running

Slide

Valve Posi-

tion

HEX

CODES

13

34

BIT

0

1

0

1

0

1

0

1

0

1

0

33

14

BIT

1

0

15

32

BIT

2

0

16

31

BIT

3

0

MEANING

OUTPUT DATA CODE

Running with MLC Inhibit

Lockout on Recycle Delay

Cutout

Undeﬁ ned

1101

0011

1011

0111

1111

B

C

D

E

F

C - A master sequence controller must be installed to pro-

vide the signals to remote start and stop the compres sors

and remote load and unload the compres sors based on

the common suction pressure or other parameter and the

com pressor status based on the optional microproces sor

output data feedback. The customer may supply his own

master sequencer panel (usually a programmable control-

ler) or Frick, can supply this sequencer if desired (contact

Frick for pricing).

MASTER SEQUENCE CONTROLLER (USUALLY

PROGRAMMABLE CONTROLLER) I/O

(TYPICAL FOR EACH COMPRESSOR)

RWB II COMPRESSOR

WITH MICROPROCESSOR

(TYPICAL FOR EACH COMPRESSOR)

INPUTS

OUTPUTS

RUN COMPRESSOR

LOAD COMPRESSOR

UNLOAD COMPRESSOR

SPARE

BIT 1

BIT 0

BIT 2

BIT 3

INPUTS

OUTPUTS

MASSEQ1

MICROPROCESSOR OUTPUT DATA CODE

A 3.5 K OHM, 10 watt resistor (RES) must be ﬁ eld installed, as shown below, when the 120 VAC outputs of the RWB II PLUS are

driving 120 VAC solid state input devices such as programmable controllers.

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

0

1

0

1

0

1

0

1

0

1

2

3

4

5

6

7

8

9

A

RWB II PLUS MICROPROCESSOR CONTROL

OPERATION

S70-200 OM (DEC 99)

Page 16

COMPRESSOR STOP COMMANDS: #01S01

# Start command sequence.

01 Compressor ID code.

S Stop compressor command.

01 ID code repeated for verification

NOTE: The compressor must be in the remote

start mode for this command to be executed.

Returned answer: A01

Character Description

Position of returned data

1 Acknowledge of command sent.

2,3 ID code of compressor.

(Carriage return, line feed.)

MICROPROCES SOR

TEL ECOM MUNICATIONS

The following details are typical and

may or may not match the software

supplied on your compressor. The

telecommunications capabilities are continuously being

expanded and improved. Therefore, you MUST consult

FRICK Company for the exact details on your particular

unit(s) before developing system software to interface

with your compressors.

The Frick RWB II PLUS Microproce ssor comes with an on

board telec om munications interface. The telecom munica tions

feature permits interfac ing the micro processor with a modem,

remote data communica tions terminal, or master computer

via RS-422 protocol. In the case of a modem, telephone

lines are used for the actual transmis sion of data permitt ing

com munications from a remote location.

The components necessary to utilize the telecom munica tions

feature will vary with the applica tion. Information concerning

these items may be obtained from Frick Company, Waynes-

boro, Pa.

COMMUNICATIONS PROTOCOL

SPECIFICATIONS:

All commands must be in ASCII (CAPS) to be recog nized. A

compressor with an ID code of [00] is considered disabled.

ID Codes from [01] through [99] are valid and are recognized

by the microproces sor.

The following is a complete list of available command types:

COMMAND CODE and DESCRIPTION

I = Returns compressor status information.

R = Compressor start command.

S = Compressor stop command.

V = Compressor slide valve control command.

D = Compressors display screens command.

P = Return Pressures information.

T = Return Temperatures information.

A = Return full load amps information.

C = Enter Change setpoints mode.

The following is a detailed description of each command:

RETURN COMPRESSOR STATUS INFORMATION: #01I

# Start of command sequence.

01 Compressor ID code.

I Return Status information command.

RETURNED ANSWER, ie: 090RRRN340

Character Description

Position of returned data

1,2,3 Slide valve position.

4 Rem o te, Auto, Manual (slide valve)

5 Del a y-recycle, Run n ing, Off.

6 Rem, Man, Off, Auto (Compres sor mode)

7 Cutout, Alarm, Normal.

8,9,10 Suction in PSIA.

(Carriage return, line feed.)

COMPRESSOR START COMMAND: #01R01

# Start command sequence.

01 Compressor ID code.

R Start compressor command.

01 ID code repeated for verification

NOTE: The compressor must be in the remote

start mode for this command to be executed.

Returned answer: A01

Character Description

Position of returned data

1 Acknowledge of command sent.

2,3 ID code of compressor.

(Carriage return, line feed.)

SLIDE VALVE CONTROL COMMANDS: #01VLXX

#01VUXX

#01VS

# Start command sequence.

01 Compressor ID code.

V Compressor control command.

L Load Slide valve command.

U Unload slide valve command.

XX = 00 Turns selected output off.

XX = 01 to 15 Turns selected output on

for XX seconds.

XX = 99 Turns selected output on.

S Return slide valve position value.

If the command was #01VL00, then the load

slide valve output on compressor #1 would

be turned off. If the command was #01VL05,

then the load slide valve output on com-

pressor #1 would be turned on for 5 sec

onds, and would then automatically turn

off. NOTE: the slide valve must be in the

remote mode for this command to be executed.

RETURNED ANSWER (for L or U commands): A01

Character Description

Position of returned data

1 Acknowledge of command sent.

2,3 ID code of compressor.

(Carriage return, line feed.)

RETURNED ANSWER (for S command), ie. 090

1,2,3 Slide valve position.

RWB II PLUS MICROPROCESSOR CONTROL

OPERATION

S70-200 OM (DEC 99)

Page 17

QUERY SETPOINTS DATA - #IDQ1 will return

Pos # Byte(s) Setpoint (Name/Comment)

1 1 Always “O”

2,3,4,5 4 Ccsp. 3 chars followed by

g or h

6,7,8,9 4 Low suct. press. cutout. 3

chars followed by g or h

10,11,12,13 4 Low suct. press. alarm. 3

chars followed by g or h

14,15 2 Prop. band

16,17 2 Dead band

18,19 2 Cycle time

20,21,22,23 4 Future

24,25,26,27 4 Future

28,29,30,31 4 Future

32,33 2 Future

34,35 2 Future

36,37 2 Future

38,39,40,41 4 Hpco

42,43,44,45 4 Hpa

46 1 ID (tenths position byte)

47 1 ID (ones position byte)

48 1 Checksum of all data (pos. 1

to 47)

49 1 CR code 13

50 1 LF code 10

51 1 O null terminator char.

COMPRESSOR DISPLAY SCREENS COMMAND: #01DXN

# Start command sequence.

01 Compressor ID code.

D Compressor control command.

X = 0 Operating display.

X = S Adjustable setpoints display.

X = D2 Adjustable setpoints Page 2.

X = X Fixed setpoints display.

X = R Shutdown record display.

X = F Freeze display.

X = C Autocycle display.

X = P Security display.

X = B Setback display.

X = + Analog offset display.

X = AN Annunciator display page “N”

N = 1 Display page #1. NOTE: “N” para-

N = 2 Display page #2. meter uses to

N = 3 Display page #3. access annunci-

N = 4 Display page #4. ator pages.

If the command was #01DA1, then the micro-

processor would dump the annunciator display

page number one. Display dumps consist of

336 characters each.

RETURN PRESSURES COMMAND: #01PX

# Start command sequence.

01 Compressor ID code.

P Return pressures command.

X = S Return suction pressure (PSIA).

X = D Return discharge pressure (g/hg).

X = O Return oil pressure (g).

X = F Return filter differential pressure.

X = A Return all pressures.

If the command was #01PS, then the micro-

processor would dump the suction pressure.

RETURNED ANSWER

XXX = 3 characters followed by a carriage

return, line feed.

If using the “A” command, then the returned

data would be:

XXXXXXXXXXXX = 12 characters followed by a

carriage return, line feed.

RETURN FULL LOAD AMPS COMMAND: #01A

# Start command sequence.

01 Compressor ID code.

A Return full load amps command.

If the command was #01A, then the micro

processor would dump the full load amps value.

RETURNED ANSWER:

XXX = 3 characters followed by a carriage

return, line feed.

RETURN TEMPERATURES COMMAND: #01TX

# Start command sequence.

01 Compressor ID code.

T Return temperature command.

X = S Return suction temperature.

X = D Return discharge temperature.

X = O Return oil temperature.

X = P Return separator temperature.

X = A Return all temperatures as a string

of data.

If the command was #01TS, then the micro-

processor would dump the suction temperature.

RETURNED ANSWER:

XXX = 3 characters followed by a carriage

return, line feed.

If using the “A” command, then the returned

data would be:

XXXXXXXXXXXXX = 13 characters followed by a

carriage return, line feed.

NOTE: The “S” command will return four (4)

characters followed by a carriage re

turn, a line feed and “+ or - .xxx”.

RWB II PLUS MICROPROCESSOR CONTROL

OPERATION

S70-200 OM (DEC 99)

Page 18

QUERY SETPOINTS DATA - #IDQ2 will return

Pos # Byte(s) Setpoint (Name/Comment)

1,2,3 3 Future

4,5,6 3 Future

7,8,9 3 Mlc amps stop load

10,11,12 3 Mlc amps force unload

13,14,15 3 Ctf

16,17 2 Recycle delay (setpoint, not

time left)

18 1 Aux 1 0=alarm, 1=shutdown

19 1 Aux 1 0=NO, 1=NC

20 1 Aux 2 0=alarm, 1=-shutdown

21 1 Aux 2 0=NO, 1=NC

22 1 Future

23,24 2 Future

25 1 Future

26 1 Future

27,28 2 Future

29 1 Future

30 1 ID (tenths position byte)

31 1 ID (ones position byte)

32 1 Checksum of all data (pos. 1

to 31)

33 1 CR code 13

34 1 LF code 10

35 1 0 null terminator char.

QUERY SETPOINTS DATA - #IDQ3 will return

Pos # Byte(s) Setpoint (Name/Comment)

1,2,3,4 4 Setback setpoint

5,6,7,8 4 Future

9 1 Setback active 1=yes, 0=no

10,11,12,13 4 Autocycle comp. start

14,15,16,17 4 Autocycle comp. stop

18,19 2 Future

20,21 2 Future

22,23 2 Autocycle min. sv.

24 1 Autocycle active 1=yes, 0=no

25,26,27,28 4 Future

29,30,31,32 4 Future

33,34 2 Future

35,36 2 Future

37,38 2 Future

39 1 Future

40 1 ID (tenths position byte)

41 1 ID (ones position byte)

42 1 Checksum of all data (pos. 1

to 41)

43 1 CR code 13

44 1 LF code 10

45 1 0 null terminator char.

g or h must be lower case - exception to "All commands

must be caps" statement at beginning of section.

CHANGE SETPOINTS COMMAND: #01C

# Start command sequence.

01 Compressor ID code.

C Change setpoint command.

xxx New setpoint

xx New setpoint

y g or h for gauge or inches

The following is the complete list of the

setpoints that may be changed while in the

change setpoints command:

01xxxy Capacity Control Setpoint

("y" deleted for KpaA & BarA ver.)

02xxxy Change Low Pressure Cutout Setpoint.

("y" deleted for KpaA & BarA ver.)

03xxxy Change Low Pressure Alarm Setpoint.

("y" deleted for KpaA & BarA ver.)

04xxx Change High Pressure Cutout Setpoint.

("xxxx" is used for KpaA & BarA ver.)

05xxx Change High Pressure Alarm Setpoint.

("xxxx" is used for KpaA & BarA ver.)

06xxx Change MLC Stop Load Setpoint.

07xxx Change MLC Force Unload Setpoint.

08xx Change Recycle Delay Setpoint.

09xxx Change CTF Setpoint.

10xx Proportional Band (PB)

11xx Dead Band (DB)

12xx Cycle Time (CT)

01 Compressor ID code.

PB 02, 05, 10, 15, 20, 25

DB 05, 10, 15, 20, 25, 30, 35, 40, 45, 50,

(decimal is assumed i.e. 01 = 0.1)

CT 05, 10, 15, 20, 25, 30

RETURNED ANSWER:

Axxxx The new setpoint which was sent

followed by a carriage return,

line feed.

“BAD” followed by the “ID”, “CR”,“LF”

if unsuccessful.

If the command was sent #01C01300g01, the

capcity control setpoint would be changed to

30.0g and the returned answer is A300g

followed by a carriage return, line feed.

If the command sent was #01C0711001, the MLC

force unload setpoint would be changed to 110%

and the returned answer is A110 followed by

a carriage return, line feed.

If the command sent was #01C0520002, the

returned answer is “BAD” followed by the ID

number and a carriage return, line feed.

RWB II PLUS MICROPROCESSOR CONTROL

OPERATION

S70-200 OM (DEC 99)

Page 19

CHANGE COMPRESSOR MODE COMMAND:

#IDMCmlD Change mode to m.

O=off A=autocycle R=remote

Return message - “A” followed by the “lD”,

CR”, “LF” if successful.

CHANGE SLIDE VALVE MODE COMMAND:

#IDMVmlD Change Slide Valve mode.

to m. A=auto R=remote

Return message - “A” followed by the “ID”,

“CR”, “LF” if successful.

CLEAR FAILURE COMMAND:

#IDKFID Clear Fails

Return message - “A” followed by the “lD”,

“CR”, “LF” if successful.

CLEAR ANTIRECYCLE COMMAND:

#IDKRID Clear Recycle Delay

Return message - “A” followed by the “ID”,

“CR”, “LF” if successful.

RETURN AC IO COMMAND:

#IDX Return Descrete AC IO Status Command:

Returns a 24 char data string followed by ID,

CR, LF. The 1st data

element represents input #1, the last element

represents output # 16.

1=energized or on, 0=deenergized or off.

RETURN FAILURE COMMAND:

#IDF Return Descrete Failure List Command:

Returns a 24 char data string followed by ID,

LF.

The 1st data element represents the 1st failure

on page 1 of the annunciator, the

last element represents the last failure on

annunciator page 4.

1=failed, 0=safe.

NOTE: not all pages or annunciator failure el-

ements are defined.

READ CONTROL TEMPERATURE COMMAND:

#JDTT Reads the control temp. from TE-5 (chan-

nel 5).

Returned Answer: +lll, CR, LF The + represents

the sign of the temperature.

The decimal is assumed between the third and

fourth character.

TEMPERATURE/PRESSURE CONTROL

COMMUNlCATlONS DATA

ADDITIONAL DISPLAY DUMP COMMAND:

#IDD1 Will dump SETPOINTS PAGE 1 (new display)

#IDDS Will dump ADJUSTABLE SETPOINTS (std

display)

#IDDC Will dump AUTO-CYCLE SETPOINTS (std

Pressure display)

#IDDT Will dump AUTO-CYCLE SETPOINTS (new

Temperature display)

CHANGE SETPOINTS COMMAND:

# Start command sequence

ID Compressor ID code

C Change setpoint command

x numeric datum field

y g or h for gauge or inches datum field

+ + or- Sign datum field

Command Prefix #IDC##datumID

## datum Description of setpoint

01xxxy Capacity Control

(“y” is deleted for KpaA & BarA ver.)

02xxxy Low Press. Cutout

(“y” is deleted for KpaA & BarA ver.)

03xxxy Low Press. Alarm

(“y” is deleted for KpaA & BarA ver.)

04xxx High Press. Cutout

(“xxxx” is used for KpaA & BarA ver.)

05xxx High Press. Alarm

(“xxxx” is used for KpaA & BarA ver.)

06xxx MLC Stop Load

07xxx MLC ForceUnload

08xx Recycle Delay

O9xxx CTF

10xx Press. Proportional Band

11xx Press. Dead Band

12xx Press. Cycle Time

13+xxx Temp. Capacity Control

14+xxx Temp. Low Temp Cutout

l5+xxx Temp. Low Temp Alarm

16xx Temp. Proportional Band

17xx Temp. Dead Band

18xx Temp. CycleTime

19x Pressure / Temperature mode. ( x=1 for

temp. x=0 for pressure )

Ranges for PB, DB, CT pressure control

setpoints: (allowable entries)

PB 02, 05, 10, 15, 20, 25

DB 05, 10, 15, 20, 25, 30, 35, 40, 45, 50

(decimal is assumed eg. 01 = 0.1)

CT 05, 10, 15, 20, 25, 30

Ranges for PB, DB, CT temperature control

setpoints: (allowable entries)

PB 02, 05, 10, 15, 20, 25

DB 01 through 30 (decimal is assumed eg. 01

= 0.1)

CT 05, 10, 15, 20, 25, 30

RETURNED ANSWER:

Axxxx The new setpoint which was sent

followed by a carriage return,

line feed.

“BAD” followed by the “ID”, “CR”, “LF”

if unsuccessful.

RWB II PLUS MICROPROCESSOR CONTROL

MAINTENANCE

S70-200 OM (DEC 99)

Page 20

Maintenance

TROUBLESHOOTING THE RWB II PLUS

MICROPRO CESSOR

This section contains information on troubleshooting and

making corrections to the microprocessor and control cir-

cuits of the RWB II PLUS unit. The section is composed of

four parts: a general information section, a troubleshoot ing

guide, a repair procedure guide, and a section with illustrative

schematics and data.

GENERAL INFORMATION

THE COMPONENTS WITHIN THE

MICRO PROCESSOR CONSOLE

CAN BE INADVERTENTLY DAM-

AGED BY STATIC ELECTRICITY OR MIS HANDLING.

ONLY QUALIFIED TECH NICIANS SHOULD DIRECTLY

HANDLE THESE COMPONENTS.

1. DO NOT REMOVE the microprocessor console cover or

attempt to make corrections to the microprocessor power

supply without shutting off the control power. Accidental

shorts can irreparably damage the SBC (single board com-

puter) or the display screens.

2. DO NOT HANDLE the SBC or the display screen boards

when their cables are disconnected without ﬁ rst attaching

a ground strap to prevent static electrical discharge from

your body.

Most problems encountered with the microprocessor and

control circuits will be the result of a wiring fault, blown fuse,

or failure of a peripheral control such as a solenoid coil or

a pressure transducer. Faults in the computer, while pos-

sible, are unlikely. If a fault develops in the computer, the

probability is that all functions will cease and the display

screens will go blank.

The control system of the RWB II PLUS compressor consists

of a 120 volt AC (high voltage) side and a 0-15 volt DC (low

voltage) side. The 120 volt side actuates solenoids, relays,

alarms, and other electro mechanical functions. The 0-15

volt DC side operates the computer and its various sensors.

The microproces sor console contains the SBC (single board

computer) and two display screens.

When working within the micropro-

cessor console, 120 VOLTS CAN

CAUSE INJURY OR DEATH.

To troubleshoot the low voltage side of the RWB II PLUS

control circuits, it is necessary to have the following tools:

1. Accurate digital multimeter.*

2. Small wire stripper.

3. Small screwdriver.

4. Small snip nose pliers.

5. 15 watt soldering iron (no larger).

6. .032,60/40 rosin core solder.

7. IC chip extraction and insertion tools.*

8. Grounding strap.*

9. Static free grounded work surface.

* Available from Frick. Order kit 451862.

TROUBLESHOOTING FRICK SBC MICROPROC ESSOR SYSTEM

(REFER TO WIRING DIAGRAMS)

SYMPTOM PROBABLE CAUSES and CORRECTIONS

DISPLAYS ARE INOPERATIVE Check the 10 amp fuse (2FU) which controls all voltage going to the

micro processor.

Shut off power to the microprocessor. Remove the console cover and conﬁ rm

that all cable and wire connections are made.

OIL PUMP DOES NOT START Verify that the Oil Pump HAND-OFF-AUTO switch (1SS) is in the AUTO

position and that the Emergency Stop Button is not depressed.

Output 11 controls the Oil Pump Starter Relay (3CR) when in the AUTO mode.

If HAND is selected on 1SS, Output 11 will not have any effect on the

operation of the oil pump starter.

If AUTO has been selected and the oil pump does not start, check for 120VAC

between Wires 39 and 2. If 120VAC is not found when the LED for Output 11

is on, check the fuse (FU11). If the problem persists, check the control

relay (3CR).

The Oil Pump Starter Auxiliary Contact switches voltage to Input 6 (Wires

28 and 2) when the auxiliary contacts are closed and the AUTO mode is

selected on 1SS. If the Input does not turn on and voltage is present at

Input 6, consult Frick Company.

RWB II PLUS MICROPROCESSOR CONTROL

MAINTENANCE

S70-200 OM (DEC 99)

Page 21

TROUBLESHOOTING FRICK SBC MICROPROCESSOR SYSTEM (Continued)

SYMPTOM PROBABLE CAUSES and CORRECTIONS

OIL PUMP IS RUNNING BUT THE The (HAND-OFF-AUTO) Oil Pump Selector Switch (1SS) controls oil pump operation

COMPRESSOR DOES NOT START and must be in the AUTO position before the compressor can be started.

Verify that the Slide Valve has unloaded to 5% or less. If the Slide Valve

has not unloaded, trouble shoot the hydraulic system. Compressor will not

start until the Slide Valve is unloaded.

Output 1 controls the motor starter. Check between terminals 38 and 2 for

120VAC. If 120VAC is not found when the LED for Output 1 is on, check

the 1.5 amp fuse (FU1).

COMPRESSOR AUXILIARY Output 1 controls the Compressor Start Relay (2CR). If the compressor does

SHUTDOWN not start and the LED for Output 1 is on, check the fuse (FU1). If the

problem persists, check the interposing relay (2CR).

The Compressor Starter Auxiliary Contacts turn on Input 5 when they are

closed. These contacts are located on the Compressor Starter.

OIL HEATERS DO NOT OPERATE The oil heaters should operate only when the compres sor is NOT running and

the oil in the separator sump is cold.

If the oil heaters do not work check fuse 1FU (15 amp). If the fuse is not

blown, check between Wires 25 and 2 and between Wires 26 and 2 for 120VAC.

If 120VAC is not found, check between wires 25 and 26. If 120VAC is found

between wires 25 and 26, the Oil Heater Relay is defective. Next, check

the voltage between Wires 9 and 2. If 120 VAC is present, the Oil Heater

Relay is defective.

If you do not read 120VAC between Wires 9 and 2 when the LED for output 10

is on, check the fuse (FU10).

SLIDE VALVE DOES NOT LOAD Verify that the Slide Valve is in the AUTO mode and that capacity control

and/or UNLOAD is calling for loading or unloading (AUTO L or AUTO U will appear on the Operating display).

Output 2 controls the Slide Valve Load Solenoid. If 120VAC is found across

Wires 17 and 2, the Slide Valve Load Solenoid should be energized. If not,

the solenoid is defective. If 120VAC is not found when the LED for Output 2

is on, check the fuse (FU2).

Output 3 controls the Slide Valve Unload Solenoid. If 120VAC is found

across Wires 16 and 2, the Slide Valve Unload Solenoid should be energized.

If not, the solenoid is defective. If 120VAC is not found across Wires 16

and 2 when the LED for Output 3 is on, check the fuse (FU3).

NOTE: Verify that the proper setpoint has been programmed into C.C.

(Capacity Control) on the Adjustable Setpoints display.

SLIDE STOP DOES NOT INCREASE Verify that the Slide Stop is in the AUTO mode and that the Vi Ratio is

and/or DECREASE calling for a Vi increase or a Vi decrease (AUTO I or AUTO D will appear

on the Operating display).

Output 4 controls the Slide Stop Increase Solenoid. If 120VAC is found

across Wires 15 and 2, the Slide Stop Increase Solenoid should be

energized. If not, the solenoid is defective. If 120VAC is not found across

Wires 15 and 2 when the LED for Output 4 is on, check the fuse (FU4).

Output 5 controls the Slide Stop Decrease Solenoid. If 120VAC is found

across Wires 14 and 2, the Slide Stop Decrease Solenoid should be

energized. If not, the solenoid is defective. If 120VAC is not found across

Wires 14 and 2 when the LED for Output 5 is on, check the fuse (FU5).

RWB II PLUS MICROPROCESSOR CONTROL

MAINTENANCE

S70-200 OM (DEC 99)

Page 22

TROUBLESHOOTING FRICK SBC MICROPROC ESSOR SYSTEM (Continued)

SYMPTOM PROBABLE CAUSES and CORRECTIONS

LIQUID INJECTION SOLENOID Verify that the Liquid Injection TXV is modulating properly and not feeding

DOES NOT ENERGIZE (LIQUID excessive liquid to the compressor. When oil temperature drops too low, the

INJECTION REFRIGERANT CUTOUT microprocessor SHOULD de-energize this solenoid.

- LICO)

Output 6 controls the Liquid Injection Solenoid. If 120VAC is found across

Wires 13 and 2, the Liquid Injection Solenoid should be energized. If not,

the solenoid is defective. If 120VAC is not found when the LED for Output 6

is on, check the fuse (FU6).

HI VI LIQUID INJECTION PORT Output 7 controls the Hi Vi Liquid Injection Port solenoid. If 120VAC is

(OPTIONAL) SOLENOID DOES NOT found across Wires 12 and 2, the Hi Vi Liquid Injection Port Solenoid

ENERGIZE should be energized. If not, the solenoid is defective. If 120VAC is not

found when the LED for output 7 is on, check the fuse (FU7).

NOTE: This output should only be on when the Vi is above 3.4

ECONOMIZER (OPTIONAL) Output 8 controls the Economizer Solenoid Valve. If 120VAC is found across

SOLENOID DOES NOT ENERGIZE Wires 11 and 2, the Economi zer Solenoid should be energized. If not, the

solenoid is defective. If 120VAC is not found when the LED for Output 8

is on, check the fuse (FU8).

NOTE: The economizer output should only be on when the slide valve is at or

above the 90% position.

ALARM HORN DOES NOT ENERGIZE Output 9 controls the Alarm Horn. The Alarm should turn on only when there

is a prealarm. If the Alarm does not sound when these conditions are

found, check for 120VAC across Wires 10 and 2. If 120VAC is not found,

check the fuse (FU9).

CONTROL PANEL DOES NOT Inputs 2 through 4 can be used to operate the compressor from a remote

RESPOND TO REMOTE CONTROL location. NOTE: Check the Operating display to verify that the compressor

SIGNALS and the slide valve are in the REMOTE MODE.

If 120VAC is found (across Wires 21 and 2, 22 and 2, and 23 and 2) and the

input does not turn on, consult Frick Company.

MOTOR LOAD CONTROL The current transducer is used to convert the AC motor amps to a DC voltage

(FORCED UNLOAD) OCCURS signal for the micropro cessor. If the %FLA reading from the Operating

AT LOW MOTOR AMPS display is incorrect, consult Frick.

PRESSURES ON THE OPERATING TEST 1 - Shut down the compressor and allow pressures to equalize. Suction

DISPLAY DO NOT APPEAR pressure, discharge pressure, and oil pressure should have the same reading.

CORRECT

TEST 2 - If either oil pressure or discharge pressure read different

pressures, one or both transducers are at fault. Valve off the suction

transducer from the unit and open the vent valve on transducer manifold to

atmosphere. If the suction transducer reads atmos pheric pressure, then the

high pressure transducer which agreed with the suction transducer in Test 1

is correct. The transducer which disagreed is defective.

NOTE: A 1% tolerance is allowed for all transducers.

COMPRESSOR DOES NOT AUTO- Verify that the [AUTO] key has been pressed and AUTO appears under SV Pos

MATICALLY LOAD OR UNLOAD on the Operating display.

If the problem persists, see the Troubleshooting section SLIDE VALVE

DOES NOT LOAD and/or UNLOAD.

DISPLAY SCREENS DISPLAY A loose or improper connection between the displays and the SBC is

SCRAMBLED PATTERN OR indicated. Remove fuse (2FU, 10 amp) for 15 seconds and, then, restore to

LISTS ALPHABET reset the displays.

RWB II PLUS MICROPROCESSOR CONTROL

MAINTENANCE

S70-200 OM (DEC 99)

Page 23

Testing Micro-Panel Alarms / Cutouts

The following are testing proce-

dures that may be used as a means

of testing the standard safeties

provided on the RWB II Frick Rotary Screw Compressor

Unit with a RWB II Plus microprocessor. They should

only be completed by a competent individual with full

understanding of safe operating procedures as they ap-

ply to industrial refrigeration. If there are any questions

in regard to any one of these procedures, do not attempt

prior to consulting Frick at (717) 762-2121.

High Discharge Press. Alarm / Cutout

1. Once the machine is up and running and maintaining an

even discharge pressure, go to the adjustable setpoints

display (record the values for the Hi Disch Alarm and

Cutout).

2. Step down to the Hi Disch Alarm setpoint and enter a

value of 10 psig lower than the current running Discharge

Pressure.

3. Then go back to the operating display to check for an

alarm. If no alarm exists, ensure that the current discharge

pressure is indeed above the new alarm value.

4. If you do have an alarm, go to Hi Disch Cutout and reset

the value to 5 psig below the current running pressure.

5. You should instantly receive the cutout. If the cutout was

not received, ensure that the value is still lower than the

running pressure.

6. If a cutout was received return to the adjustable setpoints

screen and reenter the original alarm and cutout value.

Clear the alarm and cutout.

7. Allow the recycle delay to elapse and proceed to the next

test.

Low Suction Press. Alarm / Cutout

1. With the machine running and maintaining an even suction

pressure, go to the adjustable setpoints screen (record

the values for the Lo Suct Alarm and Cutout).

2. Step to the Lo Suct Alarm and enter a value 3 psig or 3

in. hg higher than the current running pressure.

3. Return to the operating display and check for an alarm.

If no alarm exists check to ensure that the current run-

ning suction pressure is indeed lower than the new alarm

value.

4. If an alarm was received, go to the Lo Suct Cutout and

set the value 5 psig or 5 in. hg higher than the current

running pressure.

5. Once the cutout occurs, go back and reset to the original

values, and clear the cutout and alarm. Allow the recycle

delay to elapse and proceed.

Note: The Lo Suct Cutout has a 90 second delay.

Oil Pressure Alarm / Cutout

1. Push the +/- button and record the Oil Pressure value

from the analog offset display (Example: +2).

2. With the machine running and maintaining good, even oil

pressure, push the [+/-] button to access the analog offset

screen.

3. Step to the oil pressure value and max it out to +9. This

must be done to avoid a sensor fault failure.

4. At the transducer manifold, close the valve for the oil

pressure transducer (PE-1) and then open the vent valve

which exposes the transducer to atmosphere.

5. Once the time delays have expired (30 seconds for the

alarm and an additional 10 seconds for the cutout), an

alarm and cutout will occur.

6. Place valves back into their operating position and replace

the pipe plug in the vent.

7. Return to the analog offset screen and reset the offset

back to the original value.

8. Clear the alarm and cutout. Allow the recycle delay to

elapse, then proceed to the next test.

Hi Oil Temp Alarm / Cutout

1. Record the values for Hi Oil Temp Alarm and Cutout

stated on the ﬁ xed setpoints display.

2. Carefully remove temperature probe TE-3, located down-

stream from the oil ﬁ lter.

3. Slowly apply heat to the probe with a forced-air device

such as a heat gun or blower dryer.

4. Once the temperature rises to the alarm value stated on

the ﬁ xed setpoints display, an alarm should be received

with no delay.

5. Allow the temperature to continue rising until the cutout

temperature is met and the cutout is received with no

delay. Allow probe to cool then reinstall in the well.

6. Allow the recycle delay to elapse and proceed with the

next test.

Lo Oil Temp Alarm / Cutout

1. Record the values for Lo Oil Temp Alarm and Cutout

from the ﬁ xed setpoints display.

2. Carefully remove TE-4 from the belly of the separator and

immerse the probe into a crushed ice water bath.

3. Once the temperature drops to the alarm value the alarm

will be received without delay. Allow the temperature to

continue falling until the cutout value is met and occurs

without delay. Reinstall TE-4.

4. Clear the alarm and cutout. Allow the recycle delay to

elapse and proceed to the next test.

Hi Disch Temp Alarm / Cutout

1. Record the Hi Disch Temp Alarm and Cutout values

from the ﬁ xed setpoints display.

2. With the machine running, remove the discharge tempera-

ture probe TE-2 located on the discharge pipe between

the compressor and the separator.

3. Using a forced-air heat source, such as a heat gun or

blow dryer, slowly add heat to the probe and monitor the

operating display until the temperature exceeds the alarm

value and the alarm sounds.

4. Continue adding heat until the cutout value is met and

exceeded. The cutout should be received without delay.

Reinstall TE-2.

5. Clear the alarm and cutout. Allow the recycle delay to

elapse and proceed to the next test.

Never expose the probe to a direct

open ﬂ ame during test. Rapid tem-

perature rise could cause the probe

to stick or short in the closed position which would

require the probe to be changed.

Comp. Auxiliary

1. Remove #20 wire from terminal strip P3 and place a wire

nut over the end.

2. Push the RUN button.

3. If the input #5 does not receive a signal from the Compres-

sor Auxiliary Contact, the machine will cut out 16 seconds

after 2CR is energized.

4. Replace the #20 wire.

5. Clear the Cutout.

6. Allow the recycle delay to elapse and proceed to the next

test.

RWB II PLUS MICROPROCESSOR CONTROL

MAINTENANCE

S70-200 OM (DEC 99)

Page 24

Pump Auxiliary

1. Remove #19 wire from terminal strip P3 and place a wire

nut over the end.

2. Push the RUN button.

3. If input #6 does not receive a signal after 2 1/2 seconds

from the time 3CR was energized, a cutout will occur.

4. Replace the #19 wire.

5. Clear the cutout and proceed to the next test.

Oil Level

1. Remove wire #24 from terminal strip P3 and place a wire

nut over it.

2. Push the RUN button.

3. If input #1 does not receive a signal within 5 minutes, a

cutout will occur.

4. Replace wire #24.

5. Clear the cutout.

6. Allow the recycle delay to elapse and proceed to the next

test.

NOTE: The oil level cutout is not present on units with

full lube pumps. If you are unsure of the pump type on

your unit, contact Frick Service for conﬁ rmation.

Dirty Filter

1. Push the [+/-] key and record the Oil Pressure value from

the analog offset display (Example: +2).

2. With the machine running and maintaining good pres-

sures and temperatures, push the +/- button to access

the analog offset screen. Step to the oil pressure value

and max it out to +9. This must be done to avoid a sensor

fault cutout.

3. At the transducer manifold, close the valve for transducer

PE- 1 and open the bleed valve for that transducer to at-

mosphere which will bring the pressure down to 0 psig.

4. In about 15 seconds, a dirty ﬁ lter alarm will occur.

5. Quickly close the bleed valve and open the valve to PE-1

to avoid an oil pressure alarm/cutout.

6. Clear the alarm.

7. If cutout occurs, ensure that the valves are in their oper-

ating position, and the plug has been put back into the

vent.

8. Return to the analog offset screen and reset the offset

back to the original value.

9. Allow for the recycle delay to elapse and restart the ma-

chine.

RWB II PLUS MICROPROCESSOR CONTROL

MAINTENANCE

S70-200 OM (DEC 99)

Page 25

EPROM MEMORY I/C CHIP REPLACEMENT

Microprocessor EPROM memory I/C chips are located inside

the microprocessor console on the SBC board. A special

tool is required to remove these chips to lessen the chance

of damaging them (See Troubleshooting The Microproces-

sor). The procedure to replace EPROM memory chips is

outlined below:

1. Shut off control power.

2. Remove the microprocessor console cover.

3. Using a chip extraction tool, remove the old EPROM chips

from the SBC board. Pay particular attention to the orienta-

tion of the notch on the end of the chip; then install new chip

with the notch in the same position. NOTE: The chip labeled

4 must be in serted into socket U4 and the chip labeled

5 must be inserted into socket U5.

SBC BOARD REPLACEMENT

The procedure to replace SBC boards is outlined below:

1. Shut off control power.

2. Remove the old board from the machine and the new

board from its packing and place both on an antistatic

surface.

3. Remove the program chip(s) from the defective board and

install them in the replacement board.

Pay particular attention to the ori-

entation of the notch(es) on the end

of the chip(s). Install the chip(s) on

the replacement board in exactly the same position as

they were on the defective board.

4. IMPORTANT: Before installing the new board, determine

if there are gray/yellow wires from P15 (see the SBC wiring

diagram for location) on the old board. If they are present, the

display is the old style and the new board can be installed

without modiﬁ cation.

5. If the gray/yellow wires are not present on the old SBC,

the machine is equipped with a new style display. Resistor

R6 must be removed from the new board by cutting the wire

leads on either side of the resistor.

6. Then install the modified replacement board in the

panel.

MICROPROCESSOR DISPLAY

REPLACEMENT

The procedure to replace the microprocessor display is

outlined below:

1. Shut off control power.

2. Remove the defective display(s).

3. Install the new display(s).

4. If present, remove the grey/yellow wires from P15 (see

the SBC wiring diagram for location) to the display(s) as they

are no longer needed.

5. If resistor R6 is present on the SBC, cut off the wire leads

on both sides (see the SBC wiring diagram for location) and

remove it. This resistor is no longer needed.

OUTPUT FUSE REPLACEMENT

1. Shut off control power.

2. Remove the microprocessor console cover.

3. Identify the faulty fuse.

4. Use a voltmeter to verify that no voltage is present on

either side of the fuse.

5. Remove the faulty fuse using a fuse puller or screw-

driver.

6. Install a new plug-type fuse.

RWB II PLUS MICROPROCESSOR CONTROL

MAINTENANCE

S70-200 OM (DEC 99)

Page 26

P2

18

6

GROUND

LUG

RED

3

RED

4

1

3

1

RED

BLK

WHT

RED

2

BLK

WHT

2

R

AMPS

R

MOTOR

VALVE

B

R

W

P5

B

W

R

SLIDE

STOP

SLIDE

SLIDE STOP

SPAN

ZERO

TEMP

P4

WHT

SUCT

-

+

S

+

BLK

WHT

RED

PRES

SPARE

ECON

PRES

SPARE

--

SS

+ +

-

S

BLK

WHT

RED

BLK

WHT

RED

+

-

S

W

BLK

WHT

RED

BLK

W

B

FILTER

PRES

DISCH

PRES

SPARE

PRES

OIL

TEMP

SEP

ANALOG

EXPANSION

SLIDE VALVE

SPAN

ZERO

1

DIGITAL INPUTS

6

BLK

B

BLK

W

B

W

BLK

B

W

TEMP

DISCH

TEMP

OIL

SUCT

TEMP

1

2

3

1

2

P3

4

3

5

30

28

20

21

29

38

13

4

5

6

8

7

9

10

11

12

1

8

7

14

15

16

17

MODULES

DIGITAL INPUT

230

NEU

GND

115

2

5

BATTERY

P12

P15

P10

P6

P11

P9

OFF

ON

PORT

2

3

PORT

1

3

DIGITAL OUTPUTS

14

16

17

15

13

12

11

DIGITAL OUTPUTS

5

4

3

2

22

21

20

19

25

24

23

7

6

8

29

28

27

26

32

31

30

35

9

10

5

7

34

33

37

11

10

9

34

33

36

35

P1

12

13

14

41

40

39

38

44

43

42

DIG I/O EXPANSION

MODULES

DIGITAL OUTPUT

32

31

15

16

48

47

46

45

U5

U4

CHANNEL 16

CHANNEL 15

CHANNEL 14

CHANNEL 13

CHANNEL 12

CHANNEL 11

CHANNEL 10

CHANNEL 9

CHANNEL 8

CHANNEL 7

CHANNEL 6

CHANNEL 5

CHANNEL 4

CHANNEL 3

CHANNEL 2

CHANNEL 1

NEUTRAL

OIL LEVEL SWITCH

REMOTE RUN

REMOTE LOAD

REMOTE UNLOAD

COMPRESSOR AUX

COMPRESSOR START RELAY

OIL PUMP SEL SW

AUX 2

POWER

DATA BIT 0

DATA BIT 1

DATA BIT 2

DATA BIT 3

OIL HEATER RELAY

OIL PUMP SEL SW

SPARE ON ALL UNITS EXCEPT 496 & 676

WHERE USED AS INLET BEARING FEED

SLIDE VALVE LOAD

SLIDE VALVE UNLOAD

SLIDE STOP INCREASE

SLIDE STOP DECREASE

LIQUID INJECTION

HI VI LIQ INJ

ECONOMIZER

ALARM

AUX 1

TE-5

TE-4

TE-3

TE-2

TE-1

MOTOR

AMPS

SLIDE STOP

POSITION 3

SLIDE VALVE

POSITION 1

RWBP60

FRICK REV D

RWBII PLUS

---- ----

-----

POWER

SUPPLY

++++ ++++

+++++

SSSS SSSS

FUSES FU1 - FU6

F1

P13

F2

SBC WIRING DIAGRAM

POINT-TO-POINT FIELD WIRING DIAGRAM

RWBII PLUS

RXB PLUS

RDB PLUS

RXF

GND

20

18

19

4

3

5

8

1

2

T3

T2

T1

GNDGND

T1

T2

T3

3 PHASE LINE

GND

1

2

3

4

5

8

18

19

20

GND

FRICK MICRO ENCLOSURE

OIL

PUMP

MOTOR

3 PHASE SUPPLY TO MOTOR

MOTOR

COMPR

T3

T2

T1

GND

T3

T2

T1

GND

FRICK SUPPLIED

1. REFER TO MOTOR NAMEPLATE

FOR CORRECT MOTOR CONNECTION.

2. SEPARATE CONDUIT RUNS FOR

CONTROL VOLTAGE WIRING AND MOTOR

CONNECTION WIRING.

3. CONDUIT GROUNDS ARE NOT ACCEPTABLE.

4. ALL WIRING MUST BE PER LATEST EDITION

OF THE NEC AND LOCAL CODES.

5. ALL CONTROL VOLTAGE WIRING TO

14 AWG STRANDED COPPER WIRE.

T1

T2

T3

GND

CONSULT STARTER AND MOTOR WIRING DIAGRAMS

FOR EXACT WIRING CONFIGURATION.

HI-LEVEL CUTOUT AND/OR OTHER FIELD SAFETY

CUTOUTS AS REQUIRED.

NOTES:

COMBINATION STARTER PACKAGE

RWB II PLUS MICROPROCESSOR CONTROL

MAINTENANCE

S70-200 OM (DEC 99)

Page 27

MICRO COMPONENT PLACEMENT DIAGRAM

ANALOG

WIRING

THIS STUD NOT REQ'D

IF GROUNDING WASHER &

STUD ON SIDE ARE USED

TO DOOR & STUD

ON FRONT PANEL

CUSTOMER'S

GROUND WIRE

ANALOG

DRAIN WIRES

1A

INDICATES DEVICES SUPPLIED ONLY WHEN OPTIONAL OR REQUIRED

COPPER CONDUCTORS ONLY

GROUNDING WASHER

.

STUD

PA N EL

GREEN

LUG

GND

LUG

GND

TOROID

1TR

41

42

37

36

34

SPARE

CRCR CR CR

2 FU

REPLACEMENT

10 AMPTYPE FNM

250 VOLTS

42 TERMINALS

CUSTOMER'S CONTROL

POWER CONNECTION

L2 L1

5

17

23

30

33

32

31

29

24

20

22

21

20

19

18

11

14

16

15

13

12

10

8

7

5

6

5

2CR3CR 1CR

2

4

3

2

1

2

2FU

115 VOLTS

12 TERMS

1

1CR1

2A

27

27A

SPARE

26

25

1FU

1A

2A

CUST'S HTR CONNECTION

IF SEPARATE FROM CONTROL

AT STOCK LEVEL, PLACE

115 VOLT LABEL HERE.

PLACE 230 VOLT LABEL OVER

IT IF CONTROL & HEATERS

ARE 230 VOLTS.

1

2

230 VOLTS

PLACE 230 VOLT LABEL

HERE IF ONLY HEATERS

ARE 230 VOLT

1A

WIREWAY-AC WIRING ONLY

3

DIGITAL INPUT

ZERO

POT

ZERO

C.T.

TERM

SPAN

S.S.

POTPOT

1

POT

23

S.V.

F2

ANALOG TERMS

1

RWB II PLUS

FRICK REV D

P11

ANALOG

EXPANSION

4

P12

P9

11

SUPPLY

POWER

115V

P13

GND

230

NEU

115

F1

1

P15

P10

+

BAT

BATTERY

2

PORT

OFF

ON

DIG I/O EXPANSION

34

FUSES FU1-FU16

DIGITAL OUTPUT

16

DIG I/O TERMS

17

MODULES MODULES

35 48

P6

PORT

1

3 U5 U4

C.T. & SBC POWER

SUPPLY WIRING

1A FU

1B FU

1A FU OR

1B FU OR

1 FU

REPLACEMENT

TYPE BAF

250 VOLTS

15 AMP

CSA ONLY

WARN ING

MORE THAN ONE

LIVE CIRCUIT

SEE DIAGRAM

AVERTISSEMENT

CET EQUIPMENT

RENFERME PLUSIEURS

CIRCUITS SOUS TENSION.

VOIR L E SCH EMA

FRONT PANEL (REAR VIEW)

12 COND

1

26 COND

1

GREEN WIRE

DISPLAY

CONTRAST POT

DISPLAY

CONTRAST POT

4DW

(IF REQ'D)

SP FU'S

1A

FOR DRAIN WIRE

OF CHANNEL 4

DO NOT GROUND HERE

JUNCTION BOX FOR SPLIT SKID UNITS WITH

VERTICAL SEPARATORS-(2 REQUIRED)

5

24

26

2A

4+

4S

SPARE

27

2A

WIRING BY OTHERS

AC-422 Asychronous Adapter Card Pinout RWB II PLUS MICRO Ports 1 and 2 Pinout

1,3 Ground 3 Ground

9 - RX (Receive) 2 - CTS (Clear To Send)

8 + RX (Receive) 1 + CTS (Clear To Send)

5 - TX (Transmit) 5 - RX (Receive)

4 + TX (Transmit) 4 + RX (Receive)

7 - RTS (Request To Send)

RS-422 Communication Ports 1 and 2 6 + RTS (Request To Send)

9 - TX (Transmit)

Word = 8 bit 8 + TX (Transmit)

Parity = None or Even NOTE: Jumper Pin 1 to 6 and

Stop = 1 Bit Jumper Pin 2 to 7

If RTS is “+”, CTS are not used.

RWB II PLUS TELECOMMUNICATIONS

8

88

9

99

4

44

5

55

COMPUTER TO RWB II MICROPROCESSOR WIRING DIAGRAM

COMPUTER

COMMUNICATIONS

PORT: AC-422

COMPRESSOR #1

PORT #1

COMPRESSOR #2

PORT #1

RWB II PLUS MICROPROCESSOR CONTROL

MAINTENANCE

S70-200 OM (DEC 99)

Page 28

30 7 29

HI VI LIQ INJ (IF REQ'D)

19

REMOTE START/RUN/STOP

REMOTE LOAD

38

39

5

37

36

35

34

33

REMOTE UNLOAD

22

(SAFE)

1 LSL

24

23

21

COMPR. AUX

31

32

30

OIL PUMP AUX

29

28

27

26

20

FROM LN.15

(00X)

19 28

B

30

29

25

24

23

22

21

20

FU1

18 1 17

FU2

FU3

20 2

22 3

19

21

FU5

FU4

24 4

26 5

23

25

FU6

28 6 27

LIQUID INJECTION

(FULL & CYCLING OIL PUMP)

ONLY USED WITH VERT. SEP'RS.)

MAIN OIL INJ. FEED

OIL LEVEL

(NOT REQUIRED WITH

FULL LUBE OIL PUMP)

REMOTE START/RUN/STOP

REMOTE LOAD

REMOTE UNLOAD

(ONLY ON BOOSTERS WITH LIQ INJ)

PRESSURE REGULATOR

21

42

1

3

6

8

3

4

5

7

2

FOR SECOND LIQ INJ (IF REQ'D)

COMPR. RUN TIME METER

( IF REQ'D)40

COMPRESSOR AUX

OIL PUMP AUX

AUX 1 (SEE NOTE B)

AUX 2 (SEE NOTE B)

COMPR START/RUN

SLIDE VALVE LOAD

SLIDE VALVE UNLOAD

SLIDE STOP INCREASE

SLIDE STOP DECREASE

LIQUID INJECTION (IF REQ'D)

10 5

12 6

9

11

14 7

16 8

13

15

17

38

16

15

14

13

12

NOTE C

SEE

CR

2

60

A SEPARATE 115 OR 230 VAC SOURCE TO 1A & 2A

CUSTOMER SUPPLIED 115 OR 230 VAC CONTROL TRANSFORMER POWER SOURCE IS REQUIRED

REMOVE JUMPERS 1 TO 1A & 2 TO 2A & CONNECT

IF SEPARATE FEED OR VOLTAGE FOR HEATER CIRCUIT IS DESIRED,

ALL POWER SOURCES SHALL BE GROUNDED ON ONE SIDE

-ISOLATED AND SEPARATED FROM OTHER INDUCTIVE LOADS SUCH AS LIGHTING CIRCUITS

-OR FROM FRICK SUPPLIED OR SPECIFIED STARTER, USE MINIMUM #12 AWG FOR FEED

RED

25B

12

18

17

16

15

14

13

FU10

FU7

FU8

32 8 31

FU9

34 9

36 10

33

35

FU11

38 11

40 12

37

39

FU12

FU13

42 13 41

11

10

09

2 FU

10

07

08

5

06

FU14

FU15

44 14

46 15

43

45

SBC TERMINALS

FOR DIGITAL I/O

FU16

48 16 47

EMERGENCY

STOP

6

FOR 1 KW, 115 V HTR'S, MOVE

WIRE TO 1A FU & NUMBER 25A

ADD 1B FU FOR 3rd HTR

ADD 1A FU FOR 115V-1KW HTR'S

05

04

#14

03

02

1

#12

1A FU

15

1B FU

15

1 FU

1A

HOT

01

HOT

25A

25

1CR

27A

ALL HEATER WIRING

3,4,(5)

ALARM (PRE & CUTOUT)

RELAY &/OR LAMP OPTIONAL

EXCEPT WHERE NOTED

WIRING TO BE WHITE

ALL NEUTRAL (EXP: 2 & 2A)

TO BE #14 AWG

ON RWB'S 316-676 IF REQ'D

BALANCE PISTON

RELAY &/OR LAMP OPTIONAL

ALARM (PRE & CUTOUT)

OIL PUMP START/RUN

SPARE ON ALL OTHERS

DATA CODE BIT 0

PROGRAMMABLE CONTROL

DATA CODE BIT 1

PROGRAMMABLE CONTROL

DATA CODE BIT 2

PROGRAMMABLE CONTROL

DATA CODE BIT 3

PROGRAMMABLE CONTROL

ECONOMIZER (IF REQ'D)

OIL HEATER

33

10

11

99

(OOX)

TO LN.30

35

B

39

7

34

CR

1

CR

3

63

32

31

AUTO

OIL PUMP

(XOO)

HAND

A

OFF

39

3rd HEATER WHEN REQUIRED

EARTH BUSBAR AT

POWER SOURCE

GROUND BAR IN MICRO

1 KW HTR'S OPTIONAL

.5 KW HTR'S

SEPARATOR OIL HEATERS

27

26

HEATER

2A 2

#12

NEUTRAL

TIE NEUTRAL TO GROUND

AT SOURCE

ALL NEUTRALS ENTERING

THIS ENCLOSURE SHALL

BE TIED TOGETHER AT

SOURCE, NOT IN THIS

ENCLOSURE

MICROPANEL ASSEMBLY WIRING DIAGRAM

RWB II PLUS MICROPROCESSOR CONTROL

MAINTENANCE

S70-200 OM (DEC 99)

Page 29

3

HOT

SHT.2-3,4

31

30

60

63

LINE NO.

3

2CR

58

77

78

5

76

75

74

73

72

70

71

69

68

67

66

65

SEE NOTE A

IF REQ'D

JUMP TO 6

64

63

62

SEE NOTE A

IF REQ'D

JUMP TO 6

61

60

59

36

51

57

56

55

54

53

52

50

49

48

46

47

45

44

43

42

41

5

40

ENTERING OR LEAVING MICRO PANEL

OR BE RUN IN SAME CONDUIT AS ANY MICRO CONTROL WIRING

SEE FRICK PUBLICATION S90-400 SB/ SERVICE MANUAL.

FOR PROPER INSTALLATION OF ELECTRONIC EQUIPMENT,

NO SINGLE PHASE OVER 300 VOLTS SHALL ENTER OR LEAVE MICRO PANEL

NO THREE PHASE WIRING SHALL ENTER OR LEAVE MICRO PANEL

FOR HIGH POT TEST PROCEDURE, SEE MMIB NO. 4.11.10.7

AND EPROMS, SEE MMIB NO. 4.11.10.11

FOR INSTALLATION OF MICROPROCESSOR BOARD

TEST PROCEDURE, SEE MMIB NO. 4.11.10.4

FOR RWB II PLUS PACKAGE/MICROPROCESSOR

SEE 640D0019 FOR STANDARD CONTROL CENTER ASSEMBLY

ALL CONTROL CENTER WIRING TO BE #16 AWG

STRANDED WIRE UNLESS SPECIFIED OTHERWISE.

TERMINALS IN JUNCTION BOXES FOR SPLIT SKID UNITS

(OPT.)

CIRCUIT DESCRIPTION

CUSTOMER'S CONNECTIONS TO CONTROL CIRCUIT (MINIMUM OPTIONS)

CONTROL POWER

OIL HEATER POWER

CURRENT TRANSFORMER

COMPRESSOR AUX

COMPR. STARTER ISOLATED CONTACT

COMPR. STARTER (SEE NOTE A) OR

OIL PUMP STARTER ISOLATED CONTACT

OIL PUMP STARTER (SEE NOTE A) OR8,2

5,19

3,4

5,20

18,2

36,18

37,8

OIL PUMP AUX

1A,2A,GND

TERM NO.

1,2,GND

2

3CR CONTACT IS USED

WIRING IF ISOLATED

2CR CONTACT IS USED

WIRING IF ISOLATED

18

837

(Y)

3CR

(Y)

SEE NOTE B

JUMPER

(Y)

(Y)(Y)

42

2CR

SEE NOTE A

MS

SEE NOTE A

MS

(SEE NOTE C)

COMPR MOTOR STARTER

AT EACH COIL (SEE NOTE C)

PUMP STARTER COIL

INSTALLED AT OIL

SUPPRESSOR OR VARISTOR

IF STARTER CONTAINS MULTIPLE

CONTACTORS, RELAYS, & TIMERS,

ADD SUPPRESSORS OR VARISTORS

OIL PUMP STARTER

OL

NEU

OL

NEU

INDICATES DEVICES SUPPLIED ONLY

WHEN OPTIONAL OR REQUIRED

WIRING BY OTHERS- ALL WIRING ENTERING CONTROL

CENTER (INCLUDING GROUND & NEUTRAL) TO BE #14

AWG STRANDED WIRES UNLESS SPECIFIED OTHERWISE.

APPLICABLE ONLY IF REQUIRED

TERMINALS IN CONTROL CENTER

ON SEPARATOR SKID

TERMINALS IN JUNCTION BOX

ON COMPRESSOR SKID

TERMINALS IN JUNCTION BOX

GE #V250LA10A OR EQUAL FOR 230 VOLTS

GE #V130LA10A OR EQUAL FOR 115 VOLTS

METAL OXIDE VARISTOR (MOV) SPECIFICATIONS:

USE ELECTROCUBE #RG2031-3-6 OR EQUAL.

VDC IN SERIES WITH A 47 OHM RESISTOR.

RC NETWORK CONSISTING OF A .1 MFD CAPACITOR, 600

SUPPRESSOR SPECIFICATIONS:

ALL INDUCTIVE LOADS IN CONTROL CENTER.

A SURGE SUPPRESSOR OR MOV TO BE INSTALLED ACROSS

NOR. OPEN OR NOR. CLOSED.

AUX 1 & AUX 2 CAN BE PROGRAMMED TO ALARM OR SHUTDOWN,

PROGRAM AUX AS ABOVE. SEE 1 PSH WIRING BELOW FOR EXAMPLE.

ISOLATED CONTACT SHOULD BE INSERTED BETWEEN 5 & 29 OR 30.

REMOVE JUMPER 36 TO 42 & INSERT ISOLATED CONTACT(S). A SEPARATE

WHEN USING 2CR AS A ISOLATED CONTACT (PARAGRAPH 2, NOTE A),

PROGRAM AUX TO SHUTDOWN-NORMALLY CLOSED.

CONTACT(S). JUMP 42 TO EITHER 29 OR 30 (AUX 1 OR AUX 2).

(PARAGRAPH 1-NOTE A), REMOVE JUMPER 36 TO 42 & INSERT ISOLATED

WHEN REFERENCING MICRO POWER TO OPERATE COMPR. MOTOR STARTER

FOR OPTIONAL ALARMS & SHUTDOWNS: (HIGH LEVEL SHUTDOWN ETC.)

SAME NOTES APPLY TO OIL PUMP STARTER CIRCUIT ON LINE 63.

NOTE C:

NOTE B:

NOTE A:

THE HOT & NEUTRAL LINES ON LINE 60.

IF 2CR IS USED AS A ISOLATED CONTACT, WIRE AS SHOWN BETWEEN

ONLY. JUMP TERM 6 TO 36.

CONFORMS TO FRICK STARTER SPECS, WIRE AS SHOWN ON LINE 60

IF COMPR. MOTOR STARTER IS A FRICK SUPPLIED STARTER OR

13

40

1TR

41

MANUFACTURE IF

ADDED AT TIME OF

POWER ASSIST IS

POWER ASSIST

41

POWER ASSIST

SEE NOTE C

INTERVAL

15 SEC

TR

6

2

10

1

SPECIFIED

2

NOR. CLOSED

SHUTDOWN

PROGRAM AUX 1 AS

HIGH DISCH PRESS SWITCH CUTOUT OPTION

HPCO

1-PSH

36

5

42

30

SURGE SUPPRESSOR

VARISTOR

MICROPANEL ASSEMBLY WIRING DIAGRAM

RWB II PLUS MICROPROCESSOR CONTROL

MAINTENANCE

S70-200 OM (DEC 99)

Page 30

19

WHITE

38

39

5

37

36

35

34

33

PE-1

-

S

BLACK

31

32

30

29

28

27

26

RED

+

PE-2

-

S

+

RED

BLACK

WHITE

PE-3

S

-

+

WHITE

BLACK

RED

25

24

23

22

21

20

-

PE-4

S

+

BLACK

WHITE

RED

PE-5

S

-

+

WHITE

BLACK

RED

(CHANNEL 6)

OIL PRESS

1-5 VDC

TYPICAL

DO NOT GROUND PE'S AT PANEL

CABLE #6

2

S

-

IF REQUIRED

RWB II 496 & 676 ONLY

BALANCE PISTON REG

(IF REQ'D)

FILTER PRESS

1-5 VDC

(CHANNEL 7)

(CHANNEL 10)

1-5 VDC

SUCT PRESS

1-5 VDC

(CHANNEL 9)

(CHANNEL 8)

1-5 VDC

DISCH PRESS

CABLE #7

CABLE #8

+

-

+

S

-

S

+

CABLE #9

CABLE #10

-

+

S

-

S

SPARE

+

12

18

17

16

15

14

13

POT-2

SLIDE VALVE

POSITION

POTENTIOMETER

POT-1

SLIDE STOP

POSITION

POTENTIOMETER

11

10

09

07

08

06

RED

1

3

2

WHITE

BLACK

3

2

1

BLACK

WHITE

RED

MOTOR JUNCT. BOX (BY OTHERS)

C.T. MOUNTED IN STARTER OR

05

04

03

02

OF MOTOR

ONE PHASE

AMPS

MOTOR

01

5

0-5 AMP AC

SECONDARY

ECON PRESS

1-5 VDC

(CHANNEL 11)

(CHANNEL 12)

1-5 VDC

SPARE PRESS

1-5 VDC

(CHANNEL 13)

SLIDE VALVE

CHANNEL 14

SLIDE STOP

(CHANNEL 15)

-

S

+

-

S

+

-

SPARE

CABLE #14

CABLE #15

W

+

S

B

R

W

B

R

FOR C.T. WIRE SIZING

SEE RWB IOM MANUAL

(CHANNEL 16)

0-5 AMP AC

MOTOR AMPS

3

4

R

2

MICROPANEL ASSEMBLY WIRING DIAGRAM

RWB II PLUS MICROPROCESSOR CONTROL

MAINTENANCE

S70-200 OM (DEC 99)

Page 31

P1

FRONT PANEL

STUD

58

PA D

77

78

5

76

75

74

73

72

KEY

DISPLAY

BOTTOM

DISPLAY

TOP

70

71

69

68

67

66

65

64

63

62

61

60

59

51

57

56

55

54

53

52

TE-1

50

49

48

TE-2

46

47

45

TE-3

44

43

42

41

TE-4

40

5

TE-5

COLOR CODING SHOWN IS BELDEN #8777

FOR GROUNDED CIRCUITS

NO CONNECTION ON 230

SET SW 1 TO CORRECT VOLTAGE

WRAP WIRES THROUGH TOROID TWO (2)

TIMES, ALL IN THE SAME DIRECTION

12 COND RIBBON CABLE

GREEN WIRE

STUD

26 COND RIBBON CABLE

1

P13

NEU

230

115

SW1

GND

115

RING

TOROID

FERRITE

230

GREEN

P10

1

P12

SBC

1

P11

2

ARE ON THE SAME SKID

WIRED AT FRICK IF BOTH UNITS

FROM ALL OTHER WIRING

RS-422 WIRING SHALL BE SEPARATE

IF TEMPERATURE SENSOR WIRING IS IN CONDUIT, USE

#8761 BELDEN CABLE OR EQUAL. IF OPEN WIRING, USE

#8760 BELDEN CABLE OR EQUAL. GROUND DRAIN WIRE

AT PANEL END ONLY ON 4" SENSORS.

GROUND AT SENSOR END ONLY ON 1" SENSORS.

INSULATE DRAIN WIRE AT OPPOSITE END.

2000 FT. MAX. DISTAMCE.

TEMPERATURE WIRING SPECIFICATIONS:

SEE 640C0031 FOR TEMPERATURE SENSOR

ASSEMBLY-640C0031G11

ALL ANALOG LOW VOLTAGE WIRING TO BE RUN

IN SEPARATE CONDUIT FROM ALL OTHER WIRING

TEMP PROBE-FRICK P/N - 640A0035H01

WELL FOR ABOVE, 3/4"MPT WELL CONNECTION,

HEAT TRANSFER COMPOUND-P/N - 111Q0831807

1/2" FPT FOR CONNECTION BOX- P/N - 990A0062H01

SPECIFICATIONS FOR TEMP. CAPACITY CONTROL

-TEMP PROBE SIZE- .31 DIA x 1" LONG

-MOUNTING IN WELL IS DESIRABLE

-WIRE AS SHOWN IN SEPARATE CONDUIT

-SETPOINT RANGE: -50°F. TO 100°F.

NOTE 2A:

CABLE #4

BLACK

CABLE #1

BLACK

WHITE

BLACK

CABLE #2

WHITE

BLACK

CABLE #3

BLACK

WHITE

SUCT TEMP

(CHANNEL 1)

+

-

(CHANNEL 2)

DISCH TEMP

(CHANNEL 3)

-

+

-

OIL TEMP

2000 FT. MAX. DISTANCE

TYPICAL

BLACK

COLOR MAY VARY

#22 AWG TWISTED PAIR

BLACK

CABLE #5

DW

4B

4W

BLACK

WHITE

BLACK

WHITE

SEE NOTE 2A

WIRING BY OTHERS

CAPACITY CONTROL (OPTIONAL)

REMOTE TEMPERATURE

SPARE TEMP

(CHANNEL 5)

(CHANNEL 4)

-

+

SEP TEMP

+

-

2

WIRING FOR LEAD-LAG SEQUENCING

USE BELDEN #8777 OR EQUAL (3 TWISTED PAIRS)

9

PORT 2

UNIT "A"

SBC

RS-422

5

8

4

3

(NOT USED)

OPTIONAL

GRN

UNIT "B"

PORT 2

BLK

9

RED

BLK

5

8

4

RS-422

SBC

WHT

BLK

3

USE HEAT TRANSFER COMPOUND

304 S.S. WITH (2) 24" LEADS

FROM ALL OTHER WIRING

USE BELDEN #8761 CABLE OR EQUAL

MICROPANEL ASSEMBLY WIRING DIAGRAM

www.frickcold.com

100 CV Avenue

Waynesboro, PA USA 17268

Phone: 717-762-2121

FAX: 717-762-8624

www.johnsoncontrols.com

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