AK-CH 650 Version 2.0x Service Guide RC8BV402 © Danfoss 2016-02 11
P0 max. alarm °C Alarm limit for P0
P0 max. delay m Delay time before alarm for "P0 max. alarm °C"
SH min. Alarm K Alarm limit for min. superheat
SH max. Alarm K Alarm limit for max. superheat
SH Alarm delay m Time delay before alarm for “SH min limit” and “SH min limit”
Restart time m Time delay before restart of compressors
(Applies to the functions: "Sd max limit", "Pc max limit" and "P0 min limit")
Liq.inj. SH CutIn K Liquid injection in the suction line. Set superheat value where liquid injection is to
start.
Liq.inj. Sd CutIn °C Liquid injection in suction line. Set Sd temperature where liquid injection is to start.
Alarm monitoring S4 Select if alarm monitoring is required on charge temperature S4
S4 High limit High alarm limit for cold brine charge temperature
S4 High delay Delay on high charge temperature under normal regulation
S4 High del pulldown Delay on high charge temperature on start or during defrost
S4 Low limit Low alarm limit for cold bring charge temperature
S4 low delay Delay on low charge temperature
General alarm inputs
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
DI 1 Alarm Alarm status on the function dened as a DI1 alarm
ON: Alarm is active
OFF: No alarm, normal situation
DI 2.... Alarm As above, but for the alarm functions 2 to 8
Settings Main switch Main switch: ON: Regulation
OFF: Controller stopped
DI 1 Alarm delay m Time delay for the alarm "DI 1 Alarm"
DI 2.... Alarm delay m As above, but for the alarm functions 2 to 8
Thermostat/pressostats
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)
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