Fault Message - Danfoss AK-CC55 Compact User Manual

AK-CC55 Compact
Function Description
MC Defrost start Master control signal for starting a defrost. At adap-
tive defrost the defrost might be skipped if the de-
frost is not needed
MC Defrost state Read out the actual state of the defrost
MC Hold after de- Master control signal used for co-ordinated defrost
frost control to hold cabinets from returning to normal re-
frigeration after a defrost until all cabinets have termi-
nated defrost
MC Stop defrost Master control signal used to prevent a defrost start in
a controller.
MC Light signal Master control signal for control of light via data com-
munication signal from system manager
MC Actual dewpoint Master control signal sending the actual measured
dew point from system manager to controller over
the network.
MC Po load factor
MC Key/Bluetooth Master control signal that will lock down all Bluetooth
lock data communication and optionally also the opera-
tion of the display keys (depend upon selection in
P89 Display keyboard lock).
MC Min delta T Required minimum delta temperature across evapo-
rator (S3 - Te) in order to keep the air temperature at
the actual set point

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 the Table 35: Alarm relay
Table 42: Fault message
Code Alarm text
E01 Hardware failure
E06 Clock lost time
E20 Pe Evap. pressure A - Sensor error
E24 S2 Gas outlet A - Sensor error
E25 S3 Air ON evap. A - Sensor error
E26 S4 Air OFF evap. A - Sensor error
E27 S5 Evaporator A - Sensor error
A01 High temperature alarm A
A02 Low temperature alarm A
A04 Door open alarm
A05 Max defrost hold time exceeded
A11 Refrigerant not selected
A15 DI alarm 1
A16 DI alarm 2
A45 Main switch set OFF
A59 Case in cleaning mode
AA2 CO leak detected
2
AA3 Refrigerant leak detected
a04 Wrong IO configuration
 NOTE:
Data communication
The importance of individual alarms can be defined with a setting. The setting must be carried out in the group
"Alarm destinations"
© Danfoss | Climate Solutions | 2022.08
Values
0=OFF, 1=ON
0=OFF, 1=ON
0=OFF, 1=ON
0=OFF, 1=ON
0=OFF, 1=ON
0=OFF, 1=ON
priorities.) Here are the messages that may appear:
Description
The controller has a hardware failure
Clock has lost valid time
Sensor signal is out of range. Please check the sensor for correct operation
Sensor signal is out of range. Please check the sensor for correct operation
Sensor signal is out of range. Please check the sensor for correct operation
Sensor signal is out of range. Please check the sensor for correct operation
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 de-
lay.
The alarm temperature has been below the min alarm limit for a longer time period than the set alarm de-
lay.
The door has been open for a too long time
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
CO is leaking from the refrigerantion system
2
Refrigerant is leaking from the refrigeration system
Inputs and outputs have not been configured correctly
Code Short name
x13 --- MC def.start
x14 --- DefrostState
x11 --- HoldAfterDef
x12 --- Disable def.
o39 o39 Light remote
x03 --- Act.DewPoint
x83 --- Load factor
X33 --- BT lock
y04 --- Min Delta T
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