Danfoss AK-CC 550 Instructions Manual page 12

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 dur-
ing 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 Description
data communication
A1/--- High t.alarm High temperature alarm
A2/--- Low t. alarm Low temperature alarm
A4/--- Door alarm Door alarm
A5/--- Max hold time The "o16" function is activated during a
coordinated defrost
A10/--- Inject prob. Control problem
A11/--- No Rfg. sel. No refrigerant selected
A13/--- High temp S6 Temperature alarm. High S6
A14/--- Low temp S6 Temperature alarm. Low S6
A15/--- DI1 alarm DI1 alarm
A16/--- DI2 alarm DI2 alarm
A45/--- Standby mode Standby position (stopped refrigera-
tion via r12 or DI input)
A59/--- Case clean Case cleaning. Signal from DI input
A74/--- AD fault Error in the adaptive defrost function
A75/--- AD Iced Evaporator is iced up. Reduction of
air flow
A76/--- AD not defr. Defrost of evaporator is not
satisfactory
E1/--- Ctrl. error Faults in the controller
E6/--- RTC error Check clock
E20/--- Pe error Error on pressure transmitter Pe
E23/--- S1 error
Error on S1 sensor
E24/--- S2 error Error on S2 sensor
E25/--- S3 error Error on S3 sensor
E26/--- S4 error Error on S4 sensor
E27/--- S5 error Error on S5 sensor
E28/--- S6 error Error on S6 sensor
E37/--- S5 error B Error on S5B sensor
---/--- Max Def.Time Defrost stopped based on time instead
of, as wanted, on temperature
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
12
Alarm
relay
groups
(P41)
1
2
8
16
64
64
1
2
8
8
-
-
16
16
16
32
32
64
4
4
4
4
4
4
4
16
Log
X
X
X
X
Instructions RI8LN802 © Danfoss 2/2012
Operating status
The controller goes through some regulating situa-
tions where it is just waiting for the next point of the
regulation. To make these "why is nothing happening"
situations visible, you can see an operating status on
the display. Push briefly (1s) the upper button. If there is
a status code, it will be shown on the display. The indi-
vidual status codes have the following meanings:
Normal regulation
Waiting for end of the coordinated defrost
When the compressor is operating it must run for at least
x minutes.
When the compressor is stopped, it must remain stopped
for at least x minutes.
The evaporator drips off and waits for the time to run out S4
Refrigeration stopped by main switch. Either with r12 or
a DI-input
Refrigeration stopped by thermostat
Defrost sequence. Defrost in progress
Defrost sequence. Fan delay — water attaches to the
evaporator
Refrigeration stopped due to open ON input or stopped
regulation
Door is open. DI input is open
Melt function in progress. Refrigeration is interrupted
Modulating thermostat control
Emergency cooling due to sensor error
Regulation problem in the injections function
Start-up phase 2. Evaporator being charged
Adaptive control
Start-up phase 1. Signal reliability from sensors is
controlled
Manual control of outputs
No refrigerant selected
Case cleaning
Forced cooling
Delay on outputs during start-up
Heat function r36 is active
Other displays:
The defrost temperature cannot be displayed. There is
stop based on time
Defrost in progress / First cooling after defrost
Password required. Set password
Regulation is stopped via main switch
*) Emergency cooling will take effect when there is lack of signal from a defined
S3 or S4 sensor. The regulation will continue with a registered average cutin
frequency. There are two registered values – one for day operation and one for
night operation.
Alarm relay
Non High Low-High
X
S0
S1
S2
S3
S10
S11
S14
S15
S16
S17
S18
S19
S20
S21
S22
S23
S24
S25
S26
S29
S30
S32
S33
non
-d-
PS
OFF
Send via
Network
X X
X X
X X
Additional information:
Manual RS8EN
(Measurement)
Ctrl. state:
(Shown in all
menu displays)
0
1
2
3
4
10
11
14
15
16
17
18
19
20
21
22
23
24
25
26
29
30
32
33
AK-CC 550