Danfoss AK-CH 650 Service Guide

AK-CH 650 Version 2.0x Service Guide RC8BV402 © Danfoss 2016-02 13
Alarm priorities
Measurements AK error When “ON”, the controller is in alarm condition.
Comp. Ctrl. temp. Actual temperature for compressor control
S4 Cold brine supply Actual cold brine supply temperature measured with S4 temp. sensor
S3 Cold brine return Actual cold brine return temperature measured with S3 temp. sensor
P0 °C Suction pressure in °C. (Measured with the pressure transmitter)
Comp. ctrl. Ref. °C Actual reference temperature for compressor control
Compressor cap. % Cut-in compressor capacity in % (of total capacity)
Request Comp. Cap % Reference for compressor capacity (deviations may be due to time delays)
Cond. ctrl. temp °C Actual temperature for control sensor (Pc or S7)
S7 warm brine °C Actual warm brine temperature for S7 media sensor
(Only used if S7 sensor is selected as regulation sensor)
Pc °C 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)
Request Cond. cap % Reference for condenser capacity
Settings Main switch Main switch: ON: Regulation
OFF: Controller stopped
The alarm priority of the following alarms can be changed:
High priority is dened with setting = 1
Medium priority is dened with setting = 2
Low priority is dened with setting = 3
Overriding the alarms is dened with setting = 0
Standby mode Regulation has stopped
Low P0 Minimum safety limit for suction pressure P0 has been violated
High S4 High alarm limit for S4 has been exceeded
Low S4 Low alarm limit for S4 has been exceeded
High Pc/Sd Safety limit for condensing pressure Pc /discharge gas temperature is exceeded
Superheat min/max Superheat i suction line to low / high
Load Shedding Load shedding has been activated
P0/S4 sensor error Sensor signal for P
0
/ S4 is defective
Misc. sensor error Sensor signal for Ss, Sd, S3, Sc3, Saux is defective
Cold pump alarm Pump alarm. One of the pumps has fallen out. Signal from ow switch
Cold pump 1 & 2 alarm Pump alarm. Both pumps has fallen out. Signal from ow swich
Anti freeze safety All compressors have been cut out on frost protection
Compr VSD safety Variable speed drive for compressor has been cut out on safety
Comp. 1 safety Compressor has been cut out on safety
Comp. 2 safety Compressor has been cut out on safety
Comp. 3 safety Compressor has been cut out on safety
Comp. 4 safety Compressor has been cut out on safety
Comp. 5 safety Compressor has been cut out on safety
Comp. 6 safety Compressor has been cut out on safety
Pc/S7 sensor error Signal from pressure transmitter /temperature sensor is defective
Blocked air ow The intelligent air ow monitoring of the condenser reports that a cleaning is due
Fan safety Variable speed drive for condenser fans has been cut out on safety
Max def. time 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.

Danfoss AK-CH 650 Specifications

General

Brand	Danfoss
Model	AK-CH 650
Category	Controller
Language	English