F34 - Evaporator temperature (S2 / S3) for fan return after drainage:
After drainage starts the fan-delay cycle. The compressor is driven immediately, because the evaporator
temperature is high, but the fan is only activated after the temperature in the evaporator decreases from
the set value. This process is necessary to remove the heat still existing in the evaporator because of the
defrost, thus avoiding throwing it into the environment.
F35 - Minimum time for compressor on:
It is the minimum time the compressor will stay on, that is, the time interval between the last start and the
next stop. It serves to prevent voltage spikes in the power grid.
F36 - Minimum time for compressor off:
It is the minimum time the compressor will stay off, that is, the time interval between the last stop and the
next start. It serves to relieve discharge pressure and increase the service life of the compressor.
F37 - Fan stop for high temperature in evaporator:
The purpose of this function is to shut the evaporator fan down until the ambient temperature
approaches that predicted in the refrigerating installation project, avoiding high temperatures and
suction pressures that can damage the compressor. During the cooling process, if the evaporator
temperature exceeds the set value, the fan is turned off, turning it on again with a hysteresis fixed at
0,1°C/1°F. This is a valuable feature when, for example, refrigeration equipment that has been inactive
for days is put into operation or when storage rooms or display freezers are restocked.
F38 - Open door time to shut down fan:
For safety reasons, after an open door time greater than or equal to that defined in this function has
elapsed, the fan will be shut down in the cooling stage. This function is disabled when set to [no,,]
(-1).
F39 - Open door time to shut down control outputs:
For safety reasons, after an open door time greater than or equal to that defined in this function has
elapsed, the outputs will be shut down (compressor, fan and defrost). This function is disabled when set
to[no,,] (0).
F40 - Maximum temperature at condenser (S3) to shut down control outputs:
Above this temperature, beyond the visual and sound alarm indications ([aC2,]), the loads activated
by the outputs will be disconnected. In case the S3 input is set (F49) for another function, this alarm is
deactivated. This alarm is ignored until the instrument reaches the control temperature for the first time.
F41- Control differential (hysteresis) for sensor S3 when set as sensor of the condenser:
For the loads to be reconnected, the temperature of sensor S3 (condenser) will need to descend to the
value set in F40 minus the value set in this parameter.
F42 - Compressor on time without reaching the setpoint to shut down the control outputs:
It is the maximum time until which the compressor can remain on without reaching the setpoint during the
cooling process. When this time has elapsed, the outputs will be shut down (compressor, defrost fan)
and a visual and sound alarm [ALrC] will also be triggered. This function can be disabled if set to the
minimum value [no,,] (0).
F43 - Low ambient temperature alarm (S1):
It is the ambient temperature (S1) below which the instrument will indicate a low temperature visual and
sound alarm ([alo,]) (F48). The differential for the alarm's shutdown is fixed at 0.1°C/1°F. This alarm
is ignored until the instrument reaches the control temperature for the first time. During the Fast Freezing
operation mode, the low temperature alarm is disabled; it will be enabled automatically when the Fast
Freezing process finishes and the temperature reaches a value highter than the alarm value.
F44 - High ambient temperature alarm (S1):
It is the ambient temperature (S1) above which the instrument will indicate a high temperature visual and
sound alarm ([aHi,]) (F48). The differential for the alarm's shutdown is fixed at 0.1°C/1°F. This alarm
considers the temperature shown on the display, being so influenced, by temperature indication locked
during defrost (F31). The alarm is ignored until the instrument reaches the control temperature for the
first time.
F45 - Alarm inhibition time by temperature:
With this configuration active, the temperature will need to remain in the alarm condition during the
inhibition time set, for the alarm to be indicated. That way one can prevent alerts resulting from specific
temperature variations, and after defrost.
F46 - Temperature of sensor S3 (condenser) to give an alarm:
It is the condenser's temperature (S1) above which the instrument will indicate a high temperature visual
and sound alarm ([aC1,]) (F48). In case the S3 input is set (F49) for another function, this alarm is
deactivated. This alarm is ignored until the instrument reaches the control temperature for the first time.
F47 - Time of open door to give an alarm:
If the door is left open for a time greater than or equal to that set in this parameter, the controller will
activate a visual and sound "open door" alarm (F48). The alarms are suspended upon closing the door.
The audible alert can be inhibited by pressing the > key (hold for 2s). For the "open door" alarm to
operate, it is necessary to configure one of the digital inputs as door contact (F49 and F50). This function
is disabled when set to [no,,] (0).
F48 - Enabling the buzzer:
It allows enabling and disabling the internal buzzer for alarm signaling.
F49 - Function of digital input1 / sensor S3:
[Off,]Not in use
[,,,1]Digital input: Activate economic setpoint (N.O. push-button)
[,,,2]Digital input: Perform defrost (N.O. push-button)
[,,,3]Digital input: Perform fast freezing (N.O. push-button)
[,,,4]Digital input: External alarm (N.O.)
[,,,5]Digital input: Door contact (N.O.)
[,,,6]Digital input: Activate economic setpoint (N.C. push-button)
[,,,7]Digital input: Perform defrost (N.C. push-button)
[,,,8]Digital input: Perform fast freezing (N.C. push-button)
[,,,9]Digital input: External alarm (N.C.)
[,,10]Digital input: Door contact (N.C.)
[,,11]Sensor S3: Temperature differential for economic setpoint (S3-S1)
[,,12]Sensor S3: Condenser temperature control
[,,13]Sensor S3: Temperature control of second evaporator
F50 - Function of digital input 2:
[Off,]Not in use
[,,,1]Digital input: Activate economic setpoint (N.O. push-button)
[,,,2]Digital input: Perform defrost (N.O. push-button)
[,,,3]Digital input: Perform fast freezing (N.O. push-button)
[,,,4]Digital input: External alarm (N.O.)
[,,,5]Digital input: Door contact (N.O.)
F19 - Compressor status with ambient sensor (S1) disconnected:
If the ambient temperature sensor (S1) is short-circuited, disconnected or out of the measuring range,
the compressor assumes the set status in this function.
[,,,0]Compressor off
[,,,1]Compressor on
[,,,2]Cycling according to the times defined in F20 and F21.
F20 - Compressor on time in case of S1 failure:
F21 - Compressor off time in case of S1 failure:
They define the length of time the compressor is on and off, in case it is being driven in cyclic mode. This
condition occurs if sensor S1 is disconnected (or faulty) and if parameter F19 is set to [,,,2].
F22 - Time for gas collection before starting defrost:
When defrost starts, the controller will maintain, during this time, only the fan on exploiting the residual
energy of the gas. In the case of defrost in energization, this time will be disregarded.
F23 - Maximum defrost time:
This parameter is used to set the maximum allowed time for the defrost process. If at the end of this
period the defrost process is not finished by temperature, a dot will stay flashing on the lower right-hand
corner of the display. If sensor 2 is shut down, the end of the defrost process will always be determined
by time, so there is no need for a warning sign. When the maximum ice time is set to 0 ([no,,]) the
defrost process stops.
F24 - Defrost type:
[,,,0] Electrical defrost (by resistance), where only the defrost output is triggered
[,,,1] Hot gas defrost, where the compressor and defrost outputs are triggered
F25 - Condition for starting defrost (0-time / 1-temperature):
It sets the condition for starting the defrost process:
[,,,0]Time
[,,,1]Temperature
Before entering the defrost process, the controller will respect the compressor's minimum time on or off
(F35 and F36) and the gas collection stage (F22).
F26 - Maximum open door time for instant defrost:
If in the cooling stage the door is kept open for a period greater than that defined in this function, instant
defrost will occur. In case the door is open at the beginning of the cooling process, the count of this time
is restarted. This function is disabled when set to [no,,] (0).
F27 - Temperature at evaporator (S2 / S3) to start defrost:
When the evaporator temperature is lower than the value set in this function, the controller will start
defrost. If sensor S3 is set as a sensor of the second evaporator (F49), the controller will start the defrost
soon as any of the two sensors, S2 or S3, meets this condition. In case the condition to start defrost
(F25) is time, this function is ignored.
F28 - Temperature at evaporator (S2 / S3) to determine the end of defrost:
When the evaporator temperature is greater than or equal to the value set in this function, defrost will be
terminated. If sensor S3 is set as a sensor of the second evaporator (F49), the controller will shut down
the defrost outputs individually and the defrost process will be terminated when the two of them are off.
F29 - Fan on during defrost:
It defines whether the fan will always stay on or off during defrost. They are examples using the fan on, in
cases of natural defrost and defrost by finned resistors installed outside the evaporator.
F30 - Defrost at start of instrument:
It allows defrost to happen at the time the controller is energized, like for example when power returns
(in case of power failure).
F31 - Temperature indication (S1) locked during defrost:
This function is intended to prevent the visualization of a rise in ambient temperature due to defrost.
During defrost, the last temperature measured in the cooling cycle will be locked on the display. The
indication will be released after the start of the next cooling cycle, when this temperature is reached
again or exceeds the time set in this function (whichever comes first). This function can be disabled if set
to [no,,] (-1) .
F32 - Draining time (dripping of defrost water):
Time required for dripping, i.e. to drain the last drops of water from the evaporator. During this period, all
outputs remain off. If this step is not desired, set this time to [no,,].
F33 - Maximum time for fan return after drainage (fan-delay):
For safety reasons, in case the evaporator temperature does not reach the set value in function F34 or
sensor (S2 / S3) is disconnected, the fan return will happen after the time set in this function has
elapsed.
F17 - Time of fan on:
F18 - Time of fan off:
They define the length of time the fan is on and off, in case it is operating in cyclic mode.
0
1
2
3
4
5
6
7
Fan Relay ON
Fan Relay ON
Fan Relay ON
Fan Relay ON
Fan Relay ON
Fan Relay ON
Fan Relay ON
Fan Relay ON
Mode
Comp. Relay ON
Fan Relay CYCLING
Fan Relay CYCLING
Fan Relay CYCLING
Fan Relay ON
Fan Relay ON
Fan Relay ON
Fan Relay OFF
Fan Relay OFF
Comp. Relay off with
Normal or FF SP
Comp. Relay off with
Economic SP
Fan Relay CYCLING
Fan Relay ON
Fan Relay OFF
Fan Relay CYCLING
Fan Relay ON
Fan Relay OFF
Fan Relay CYCLING
Fan Relay OFF
F16 - Fan operating mode:
This parameter allows setting how the fan output will behave during the cooling cycle. In this case, its
operating options consider the compressor's output status and the setpoint the instrument is operating
with. When set to cycle, the on and off times are defined by F17 and F18.