Danfoss AK-CH 650 Service Manual
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Danfoss AK-CH 650 Service Manual

Danfoss AK-CH 650 Service Manual

Capacity controller for water chiller
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Service Guide
Capacity controller
for water chiller
AK-CH 650
ADAP-KOOL® Refrigeration control systems

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Summary of Contents for Danfoss AK-CH 650

  • Page 1 Service Guide Capacity controller for water chiller AK-CH 650 ADAP-KOOL® Refrigeration control systems...
  • Page 2 Regarding the use of AKM, reference is made to the AKM Manual. Validity This menu operation (from January 2016 applies to controller type AK-CH 650, code number/ 080Z0132 with programme version 2.0x. Function groups The operation is divided up into several function groups.
  • Page 3 The operation from the AKM programme cannot contain them all. If there is a need for access to all measurements and settings, you should make use of Service Tool type AK-ST 500. AK-CH 650 Version 2.0x Service Guide RC8BV402 © Danfoss 2016-02...

  • Page 4: Main Settings

    OFF: Normal situation Suction status 0: Power up Controller has been powered up (power supply re-connected) 1: Stopped Capacity control has been stopped ("Main switch" = OFF or "Control mode" = OFF) Service Guide RC8BV402 © Danfoss 2016-02 AK-CH 650 Version 2.0x...
  • Page 5 2: Last compressor is stopped only after pump down No. of compressors Defined 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.
  • Page 6 Compressor is in alarm condition (cut out on safety) 4: Restart Compressor is waiting for elapse of “Recycle time” 5: Standby Compressor is ready to start 10: Full loaded All capacity cutin 11: Running Capacity control is running Service Guide RC8BV402 © Danfoss 2016-02 AK-CH 650 Version 2.0x...

  • Page 7: Pump Control

    (only relevant if "Cold Pump ctrl" is set to 4 or 5) Pump alarm delay Delay on pump alarm before alarm is activated and automatic pump changeover car ried out (only if "Cold Pump ctrl" is set to 4 or 5) AK-CH 650 Version 2.0x Service Guide RC8BV402 © Danfoss 2016-02...

  • Page 8: Defrost Control

    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 Service Guide RC8BV402 © Danfoss 2016-02 AK-CH 650 Version 2.0x...
  • Page 9 VSD Start speed % Minimum speed for start of Variable speed drive (Must be set higher than “VSD Min. Speed %”) Cap. limit night % Capacity limitation during night operation AK-CH 650 Version 2.0x Service Guide RC8BV402 © Danfoss 2016-02...

  • Page 10: Safety Functions

    P0 min del at start On start of the first compressor the security switch on the low-pressure security function ”Po My limit” is delayed by the set time to prevent low-pressure dropout at start. Service Guide RC8BV402 © Danfoss 2016-02 AK-CH 650 Version 2.0x...
  • Page 11 Condensing pressure in °C. (measured with the pressure transmitter) Cond. ctrl. ref. °C Actual reference temp. for condenser capacity (incl. external reference signal, if any) Cond. cap. % Cut-in condenser capacity in % (of total capacity) AK-CH 650 Version 2.0x Service Guide RC8BV402 © Danfoss 2016-02...

  • Page 12: Voltage Inputs

    Time delay for high alarm Volt 1 Low Al.Dly m Time delay for low alarm (Use Service Tool if data concerning Volt 2, 3, 4 and 5 are to be downloaded). Service Guide RC8BV402 © Danfoss 2016-02 AK-CH 650 Version 2.0x...

  • Page 13: Alarm Priorities

    Defrost is stopped because of too long defrost time. Check evaporator. AKM menu: "For DANFOSS only" This menu contains data and setting values for special internal controller functions. Do not change the stated values. AK-CH 650 Version 2.0x Service Guide RC8BV402 © Danfoss 2016-02...
  • Page 14 Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alternations can be made without subsequential changes being necessary in specifications already agreed.

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