Danfoss AK-PC 781

12 Menu operation RC8CE202 © Danfoss 03/2013 AK-PC 781 Version 4.1x
High P0 0/1/2/3/4
High Pc/Sd 0/1/2/3/4
Hpcontrol / Receive 0/1/2/3/4
Superheat Min/Max 0/1/2/3/4
Load shedding 0/1/2/3/4
P0/S4/Pctrl error 0/1/2/3/4
Misc. sensors 0/1/2/3/4
Comp. common safety 0/1/2/3/4
Comp. VSD safety 0/1/2/3/4
Comp. 1 safety 0/1/2/3/4
Comp. 2 safety 0/1/2/3/4
Comp. 3 safety 0/1/2/3/4
Comp. 4 safety 0/1/2/3/4
Comp. 5 safety 0/1/2/3/4
Comp. 6 safety 0/1/2/3/4
Comp. 7 safety 0/1/2/3/4
Comp. 8 safety 0/1/2/3/4
Pc/S7 sensor error 0/1/2/3/4
Blocked air ow 0/1/2/3/4
Fan safety 0/1/2/3/4
Comp. Low Oil lvl 0/1/2/3/4
Comp. High Oil lvl 0/1/2/3/4
Oil Separator alarm 0/1/2/3/4
Oil Receiver alarm 0/1/2/3/4
Oil Recv High press 0/1/2/3/4
Oil Recv. Low press 0/1/2/3/4
Tw boiling alarm 0/1/2/3/4
Hr boiling alarm 0/1/2/3/4
General alarm inputs
Measurements AK error When “ON”, the controller is in alarm condition.
Comp. ctrl. temp °C Actual temperature for control sensor (Po or S4)
Comp. ctrl. ref. °C Actual reference temp. for compressor capacity
(incl. external reference signal, if any)
Compressor cap. % Cut-in compressor capacity in % (of total capacity)
Request Compr. Cap % Reference for compressor capacity (deviations may be due to time delays)
P0 °C Suction pressure in °C. (Measured with the pressure transmitter)
Ss Suction gas °C Actual suction gas temperature
Cond. ctrl. temp °C Actual temperature for control sensor (Pc or S7)
Cond. ctrl. ref. °C Actual reference temp. for condenser capacity
(incl. external contributions, if any)
Cond. cap. % Cut-in condenser capacity in % (of total capacity)
Request Cond. cap % Reference for condenser capacity
Pc Bar Condensing pressure (measured with the pressure transmitter)
Tc °C Condensing pressure in °C. (measured with the pressure transmitter)
Gc status Actual gas cooler operation:
0=O. 1=Standby. 2=Max COP operation. 3=Heat recovery. 4=Extra capacity.
5=Manual control.
Pgc Bar Actual gas cooler pressure
Pgc reference Bar Actual reference for gas cooler pressure
Sd discharge gas °C Actual discharge gas temperature
Sgc °C Actual temperature at outlet from the gas cooler
DI 1 input Alarm status on the function dened as a DI1 alarm
ON: Alarm is activ
OFF: No alarm, normal situation
DI 2.... Input As above, but for the alarm functions 2 to 6
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 6