Master control signal for starting a defrost. At adap-
tive defrost the defrost might be skipped if the de-
frost is not needed
Read out the actual state of the defrost
Master control signal used for co-ordinated defrost
control to hold cabinets from returning to normal re-
frigeration after a defrost until all cabinets have termi-
nated defrost
Master control signal used to prevent a defrost start in
a controller.
Master control signal for control of light via a data
communication signal from the system manager
Master control signal sending the actual measured
dewpoint from the system manager to the controller
over the network.
Master control signal that will lock down all Bluetooth
data communication and optionally also the opera-
tion of the display keys (depend upon selection in
P89 Display keyboard lock)
Required minimum delta temperature across evapo-
rator (S3 - Te) in order to keep the air temperature at
the actual setpoint
No. of sections in the case
Fault message
In an error situation the alarm LED on the front will be on and the alarm relay will be activated (depending on
priority). If you push the alarm button for 3 seconds you can see the alarm report in the display. (Alarm priorities can
be changed. See Table 39: Alarm relay priorities.) Here are the messages that may appear:
The controller has a hardware failure
Clock has lost valid time
Pe Evap. pressure A - Sensor error
Sensor signal is out of range. Please check the sensor for correct operation
S2 Gas outlet A - Sensor error
Sensor signal is out of range. Please check the sensor for correct operation
S4 Air OFF evap. A - Sensor error
Sensor signal is out of range. Please check the sensor for correct operation
S5 Evaporator A - Sensor error
Sensor signal is out of range. Please check the sensor for correct operation
S5 Evaporator B - Sensor error
Sensor signal is out of range. Please check the sensor for correct operation
Humidity sensor - Sensor error
Sensor signal is out of range. Please check the sensor for correct operation
S4 Air OFF evap. B - Sensor error
Sensor signal is out of range. Please check the sensor for correct operation
S4 Air OFF evap. C - Sensor error
Sensor signal is out of range. Please check the sensor for correct operation
S2 Gas outlet B - Sensor error
Sensor signal is out of range. Please check the sensor for correct operation
S2 Gas outlet C - Sensor error
Sensor signal is out of range. Please check the sensor for correct operation
The alarm temperature has been above the max alarm limit for a longer time period than the set alarm delay.
The alarm temperature has been below the min alarm limit for a longer time period than the set alarm delay.
The door has been open for a too long time
Max defrost hold time exceeded
The controller has been waiting longer time than permitted after a co-ordinated defrost.
The refrigerant has not been selected hence control can not be initiated
Alarm signal from digital input signal
Alarm signal from digital input signal
The controller manin switch has been set to either Stop or Manaual control. Alternatively a digital input set up for
"main switch" function, has stopped control
A case cleaning operation has been started on a case
The alarm temperature has been above the max alarm limit for a longer time period than the set alarm delay.
The alarm temperature has been below the min alarm limit for a longer time period than the set alarm delay.
CO
2
is leaking from the refrigerantion system
Refrigerant leak detected
Refrigerant is leaking from the refrigeration system
The humidity level is too high
The humidity level is too low
The alarm temperature has been above the max alarm limit for a longer time period than the set alarm delay.
The alarm temperature has been below the min alarm limit for a longer time period than the set alarm delay.
AK-CC55 Multi Coil
© Danfoss | Climate Solutions | 2022.08 BC365022028193en-000201 | 58
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