Danfoss AK-CH 650 Service Manual - Page 5

Browse online or download pdf Service Manual for Controller Danfoss AK-CH 650. Danfoss AK-CH 650 15 pages. Capacity controller for water chiller

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Actual Zone

Load shed input 1

Load shed input 2

Liq. Inj. heat exch

No. of compressors

Comp. application

Step control mode

S4 Min 24h

S4 Max 24h

S4 Average 24h

Extra cooling req.

Settings

Main switch

Cap. control mode

Manual capacity %

Control sensor

Reference mode

Setpoint °C

++Zone delay s

+Zone delay s

+Zone band K

Neutral zone K

-Zone band K

-Zone delay s

AK-CH 650 Version 2.0x

2: Manual

3: Alarm

4: Restart

5: Standby

10: Full loaded All capacity cutin

11: Running Capacity control is running

Actual zone for capacity regulation:

0: P0-error

1: - - Zone

2: - Zone

3: NZ

4: + Zone

5: + + Zone

Actual status on Load shed input 1

Actual status on Load shed input 2

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

Defined number of compressors

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

Selected coupling pattern for compressors

Sequential: Compressors are cut in/out in strict accordance

with compressor number

Cyclic: Runtime equalisation between compressors

Best fit: Compressors are cut in/out in order to

make the best possible fit to actual load

0: Sequential

2: Cyclic

3: Best fit

Minimum value for S4 temp. For the last 24 hours

Maximum value for S4 temp. For the last 24 hours

Average value for S4 temp. For the last 24 hours

Brine temperature is higher than desired, and the relay "extra cooling" is active.

Main switch:

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 setting of compressor capacity

The value is in % of total capacity controlled by the controller

Choise of regulation sensor

0: P0

3: S4

Choice of suction pressure reference

0: SP + Ext. Ref + Night + S3 offset: 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

Setting of required suction pressure in °C

Time delay between step cut-ins in the regulation band over the "+Zone band"

Set in seconds

Time delay between step cut-ins in the regulation band over the neutral zone

Set in seconds

Regulation band over the neutral zone

Neutral zone for suction pressure

Regulation band under the neutral zone

Time delay between step cut-outs in the regulation band under the neutral zone

Set in seconds

Capacity is controlled manually ("Control mode" = MAN)

Capacity control is in alarm condition (fx. alarm on Po Min

or Pc Max)

Capacity control is waiting for elapse of "Restart time"

Capacity control is ready to start

ON:

Regulation

OFF: Controller stopped