Danfoss AK-CC 550A User Manual

24 Manual RS8FS402 © Danfoss 2016-03 AK-CC 550A
*) Emergency cooling will take eect when there is lack of signal from a dened S3 or S4 sensor or signal from the pressure transmitter is outside signal
range.. The regulation will continue with a registered average cutin frequency. There are two registered values – one for day operation and one for
night operation.
Operating status (Measurement)
The controller goes through some regulating situations 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 briey (1s) the upper button. If there is a status code, it will
be shown on the display. The individual status codes have the following meanings:
Ctrl. state:
(Shown in all menu displays)
Normal regulation S0 0
Waiting for end of the coordinated defrost S1 1
When the compressor is operating it must run for at least x minutes. S2 2
When the compressor is stopped, it must remain stopped for at least x minutes. S3 3
The evaporator drips o and waits for the time to run out S4 4
Refrigeration stopped by main switch. Either with r12 or a DI-input S10 10
Refrigeration stopped by thermostat S11 11
Defrost sequence. Defrost in progress S14 14
Defrost sequence. Fan delay — water attaches to the evaporator S15 15
Refrigeration stopped due to open ON input or stopped regulation S16 16
Door is open. DI input is open S17 17
Melt function in progress. Refrigeration is interrupted S18 18
Modulating thermostat control S19 19
Emergency cooling due to sensor error S20 20
Regulation problem in the injections function S21 21
Start-up phase 2. Evaporator being charged S22 22
Adaptive control S23 23
Start-up phase 1. Signal reliability from sensors is controlled S24 24
Manual control of outputs S25 25
No refrigerant selected S26 26
Appliance cleaning S29 29
Forced cooling S30 30
Delay on outputs during start-up S32 32
Heat function r36 is active S33 33
Case shut down S45 45
Other displays:
The defrost temperature cannot be displayed. There is stop based on time non
Defrost in progress / First cooling after the defrost where the temperature is still above the
thermostat band.
-d-
Password required. Set password PS
Regulation is stopped via main switch OFF
Status on function "Adaptive defrost"
0: O. Function is not activated and is zero set
1: Sensor error S3/S4 are reversed.
2: Tuning is in progress
3: Normal
4: Light build-up of ice
5: Medium build-up of ice
6: Heavy build-up of ice
U01 AD state
Number of defrosts carried out since the initial power up or since the resetting of
the function
U10 Acc.defrost
Number of defrosts skipped since the initial power up or since the resetting of the
function
U11 Acc.def.skip
*) Not all will be displayed. Only the function belonging to the selection application is displayed.

Danfoss AK-CC 550A Specifications

General

Brand	Danfoss
Model	AK-CC 550A
Category	Controller
Language	English