Fault Message - Danfoss AK-CC55 Water Loop User Manual

AK-CC55 Water Loop
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 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 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 Load request Master control signal used to control the load balance
between multiple case controllers on the same suc-
tion line
MC Force cond. fan Master control signal for starting condenser fan in
plug-in cabinets in order to reclaim heat in the store.

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 Alarm relay
Table 37: Fault message
Code Alarm text
E01 Hardware failure
E06 Clock lost time
E25 S3 Air ON evap. A - sensor error
E26 S4 Air OFF evap. A - sensor error
E27 S5 Evaporator A - sensor error
E50 S7 Brine inlet temp. sensor error
E65 S8 Brine outlet temp. sensor error
A01 High temperature alarm A
A02 Low temperature alarm A
A04 Door open alarm
A05 Max defrost hold time exceeded
A15 DI alarm 1
A16 DI alarm 2
A19 Compressor safety alarm
A45 Main switch set OFF
A59 Case in cleaning mode
A93 Speed drive alarm
AA3 Refrigerant leak detected
AA4 S7 Max. brine temp.
a04 Wrong IO configuration
Z01 Max defrost time exceeded A
 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 | 2022.04
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=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.
Alarm signal from digital input signal
Alarm signal from digital input signal
Alarm from digital input monitoring function
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
Alarm from digital input monitoring function
Refrigerant is leaking from the refrigeration system
The S7 brine temperature has exceeded the set maximum temperature alarm limit
Inputs and outputs have not been configured correctly
The last defrost cycle has stopped on time instead of set temperature
Code Short name
x13 --- MC def.start
x14 --- DefrostState
x11 --- HoldAfterDef
x12 --- Disable def.
o39 o39 Light remote
x03 --- Act.DewPoint
x83 --- Load factor
aaa --- Key/BT Lock
x82 --- LoadReq
x85 --- Cond. Fan
BC378540472015en-000101 | 60