Fault Message - Danfoss AK-CC55 User Manual

AK-CC55 Single Coil and Single Coil UI
Function Description
MC Case shutdown Master control signal used to shut down a case for a
time period. During shutdown there will be no alarm
monitoring
MC Forced closing Master control signal that will close the injection
valve
MC Forced cooling Master control signal that will provide forced cooling 0=OFF, 1=ON
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 Request next Master control signal used by system manager to see
defrost if a controller is requesting that the next defrost has
to be carried out
MC Light signal Master control signal for control of light via a data
communication signal from the system manager
MC Actual dewpoint Master control signal sending the actual measured
dewpoint from the system manager to the controller
over the network.
MC Tc temp. mean Master control signal distributing the condensing
temperature signal to the case controllers that are us-
ing adaptive defrost. At transcritical CO2 sites the re-
ceiver pressure is distributed to the case controllers.
This function needs to be set up in the system man-
ager.
MC Po load factor
MC Bluetooth lock Master control signal that will lock down all Bluetooth
data communication
MC Min. delta T Required minimum delta temperature across evapo-
rator (S3 - Te) in order to keep the air temperature at
the actual setpoint

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 40: Alarm relay
Table 48: 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
E28 S6 product temp. A - Sensor error
E34 S3 Air ON evap. B - Sensor error
E37 S5 Evaporator B - Sensor error
E59 Humidity sensor - 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
A13 S6 high product temperature A
© Danfoss | Climate Solutions | 2021.02
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
0=No, 1=Yes
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
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
The S6 Product temperature has been above the max alarm limit for a longer time period than the set alarm
delay.
Code Short name
x17 --- Case shutdwn
x07 --- Forced close
x08 --- Forced cool.
x13 --- MC def.start
x14 --- DefrostState
x11 --- HoldAfterDef
x12 --- Disable def.
x94 --- AD def.req.
o39 o39 Light remote
x03 --- Act.DewPoint
x04 --- TcTempMean
x83 --- Load factor
aaa --- BT lock
y04 --- Min Delta T
BC364229688105en-000101 | 62