Danfoss AK-CH 650 Service Guide

AK-CH 650 Version 2.0x Service Guide RC8BV402 © Danfoss 2016-02 7
Comp 2 … Status As above for compressor no. 2 to 6
VSD Speed % The present speed of the compressor motor controlled by the frequency converter
Comp 1 capacity % Actual cut-in capacity on this compressor
Comp 2 …capacity % As above for compressor no. 2 to 6
Comp 1 Runtime % 24 Running time for compressor 1 in percent within the past 24 hours
Comp 2 …Runtime % 24 As above for compressor no. 2 to 6
Comp 1 Cycles / 24 h Number of compressor starts during the past 24 hours
Comp 2 …Cycles / 24 h As above for compressor no. 2 to 6
Settings Main switch Main switch: ON: Regulation
OFF: Controller stopped
1 Min. ON-time m Minimum duration of ON period
2 …Min. ON-time m As above for compressor no. 2 to 6
1 Min. OFF-time m Minimum duration of OFF period
2 …Min. OFF-time m As above for compressor no. 2 to 6
1 recycle time m Minimum period of time between two successive starts.
2 …recycle time m As above for compressor no. 2 to 6
1 runtime h Compressor’s total run time in hours
2 …runtime h As above for compressor no. 2 to 6
Pump control
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
Cold pump running Reading of pump status
0: Pumps have stopped
1: Cold pump 1 is in use
2: Cold pump 2 is in use
3: Both pumps are in use
Flow switch status Current status for ow switch input
Pump 1 safety Actual status for input "Pump 1"
Pump 2 safety Actual status for input "Pump 2"
Settings Main switch Main switch: ON: Regulation
OFF: Controller stopped
Cold Pump ctrl. Choice of pump operation
0: Both pumps are stopped
1: Cold pump 1 is in constant use
2: Cold pump 2 is in constant use
3: Both pumps are in constant use
4: O set of operational time between the two pumps. Start before stop
5: O set of operational time between the two pumps. Stop before start
Pump cycle time The operational times of the pumps before pump switch is carried out (pump’s opera-
tional time before changeover to the other pump)
Pump switch time Overlap time during pump changeover where both pumps are in use or break time
when switching between two pumps (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)

Danfoss AK-CH 650 Specifications

General

Brand	Danfoss
Model	AK-CH 650
Category	Controller
Language	English