4 Service Guide RC8BV402 © Danfoss 2016-02 AK-CH 650 Version 2.0x
Main settings
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
External Main Switch Status of input “Extern Main Switch”. In pos. “OFF” the regulation is stopped by force
Settings Main switch Main switch: ON: Regulation
OFF: Controller stopped
Conguration lock Lock of conguration.
In order to select quick setup or select refrigerant type, the conguration lock must
be “open”. Note: ”Main switch” must be OFF in order to set conguration lock in “open”
position
0: Open
1: Locked
Select quick setup Select a pre dened application. All in- and outputs will be pre-dened.
All setpoint will be adapted to the selected application. Please notice that the control
ler will make a restart when a selection has been made.
See AK-PC 840 manual for further details about the predened applications.
Refrigerant type Po Select refrigerant type
0= not selected, 1=R12. 2=R22. 3=R134a. 4=R502. 5=R717. 6=R13. 7=R13b1.
8=R23. 9=R500. 10=R503. 11=R114. 12=R142b. 13=User dened 14=R32. 15=R227.
16=R401A. 17=R507. 18=R402A. 19=R404A. 20=R407C. 21=R407A. 22=R407B.
23=R410A. 24=R170. 25=R290. 26=R600. 27=R600a. 28=R744. 29=R1270. 30=R417A
Suction capacity 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
MC dP0 oset K Actual displacement value for the suction pressure in connection with a “P0
Optimiser” function (Master control function in AKA gateway)
S3 oset Contribution from reference displacement via S3 sensor
Ext. Ref. Oset °C Contribution from external reference displacement
Night setback Status of night setback function
ON: Night (An increase of the evaporating pressure is permitted)
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)
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