Danfoss AK-CC 550B User Manual page 25

Fault message
In an error situation the LED's on the front will flash and the alarm relay will be activated. If you push the top button in this situation you can see the
alarm report in the display.
There are two kinds of error reports - it can either be an alarm occurring during the daily operation, or there may be a defect in the installation.
A-alarms will not become visible until the set time delay has expired.
E-alarms, on the other hand, will become visible the moment the error occurs.
(An A alarm will not be visible as long as there is an active E alarm).
Here are the messages that may appear:
Code / Alarm text via data
communication
A1/--- High t.alarm
A2/--- Low t. alarm
A4/--- Door alarm
A5/--- Max hold time
A10/--- Inject prob.
A11/--- No Rfg. sel.
A13/--- High temp S6
A14/--- Low temp S6
A15/--- DI1 alarm
A16/--- DI2 alarm
A45/--- Standby mode
A59/--- Case clean
A70/--- High temp S3B
A71/--- Low temp S3B
--- AD fault
--- AD Iced
--- AD not defr.
--- AD flashgas
E1/--- Ctrl. error
E6/--- RTC error
E20/--- Pe error
E24/--- S2 error
E25/--- S3 error
E26/--- S4 error
E27/--- S5 error
E28/--- S6 error
E34/--- S3 error B
E37/--- S5 error B
---/--- Max Def.Time
Data communication
The importance of individual alarms can be defined with a setting. The setting must be carried out in the group "Alarm destinations"
Settings from Settings from
System manager AKM (AKM destination)
High 1
Middle 2
Low 3
Log only
Disabled
AK-CC 550B
Description
High temperature alarm
Low temperature alarm
Door alarm
The "o16" function is activated during a coordinated defrost
Control problem
No refrigerant selected
Temperature alarm. High S6
Temperature alarm. Low S6
DI1 alarm
DI2 alarm
Standby position (stopped refrigeration via r12 or DI input)
Case cleaning. Signal from DI input
High temperature alarm, B section
Low temperature alarm, B-section
Error in the adaptive defrost function
Evaporator is iced up. Reduction of air flow
Defrost of evaporator is not satisfactory
Flash gas is formed at the valve
Faults in the controller
Check clock
Error on pressure transmitter Pe
Error on S2 sensor
Error on S3 sensor
Error on S4 sensor
Error on S5 sensor
Error on S6 sensor
Error on S3B sensor
Error on S5B sensor
Defrost stopped based on time instead of, as wanted, on temperature
Log
X
X
X
X
Manual RS8GL302 © Danfoss 2016-03
Alarm relay
Non High Low-High
X X
X
X
Alarm relay groups (P41)
1
2
8
16
64
64
1
2
8
8
-
-
1
2
16
16
16
16
32
32
64
4
4
4
4
4
4
4
16
Send via
Network
X
X
X
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