Danfoss AK-CH 650 Service Guide

AK-CH 650 Version 2.0x Service Guide RC8BV402 © Danfoss 2016-02 5
2: Manual Capacity is controlled manually ("Control mode" = MAN)
3: Alarm Capacity control is in alarm condition (fx. alarm on Po Min
or Pc Max)
4: Restart Capacity control is waiting for elapse of “Restart time”
5: Standby Capacity control is ready to start
10: Full loaded All capacity cutin
11: Running Capacity control is running
Actual Zone Actual zone for capacity regulation:
0: P0-error
1: - - Zone
2: - Zone
3: NZ
4: + Zone
5: + + Zone
Load shed input 1 Actual status on Load shed input 1
Load shed input 2 Actual status on Load shed input 2
Liq. Inj. heat exch Liquid injection can be coordinated with the compressor operation:
0: no coordination
1: Synchronization with compressor operation
2: Last compressor is stopped only after pump down
No. of compressors Dened number of compressors
Comp. application Select the compressor application required (see AK-CH 650 manual for further details)
0: Single step only
1: 1xComp. w. unloaders + Single step
2: 2xComp. w. unloaders + Single step
3: Comp. w. unloaders only
4: 1xVariable speed + Single step
5: 1xVariable speed + Comp. w. unloaders
6: 2xVariable speed + Single step
Step control mode Selected coupling pattern for compressors
Sequential: Compressors are cut in/out in strict accordance
with compressor number
Cyclic: Runtime equalisation between compressors
Best t: Compressors are cut in/out in order to
make the best possible t to actual load
0: Sequential
2: Cyclic
3: Best t
S4 Min 24h Minimum value for S4 temp. For the last 24 hours
S4 Max 24h Maximum value for S4 temp. For the last 24 hours
S4 Average 24h Average value for S4 temp. For the last 24 hours
Extra cooling req. Brine temperature is higher than desired, and the relay "extra cooling" is active.
Settings Main switch Main switch: ON: Regulation
OFF: Controller stopped
Cap. control mode 0: MAN (The compressor capacity will be controlled manually)
1: OFF (The capacity control will be stopped)
2: AUTO (The capacity is controlled by the PI controller)
Manual capacity % Manual setting of compressor capacity
The value is in % of total capacity controlled by the controller
Control sensor Choise of regulation sensor
0: P0
3: S4
Reference mode Choice of suction pressure reference
0: SP + Ext. Ref + Night + S3 oset: Used if you require override via 0-10V signal, S3
sensor or night setback.
1: SP + Po optimization: Used if you want to optimize the reference from the
refrigeration appliance (network function) which is most used
Setpoint °C Setting of required suction pressure in °C
++Zone delay s Time delay between step cut-ins in the regulation band over the “+Zone band”
Set in seconds
+Zone delay s Time delay between step cut-ins in the regulation band over the neutral zone
Set in seconds
+Zone band K Regulation band over the neutral zone
Neutral zone K Neutral zone for suction pressure
-Zone band K Regulation band under the neutral zone
-Zone delay s Time delay between step cut-outs in the regulation band under the neutral zone
Set in seconds

Danfoss AK-CH 650 Specifications

General

Brand	Danfoss
Model	AK-CH 650
Category	Controller
Language	English