Danfoss AK-PC 781 User Manual

AK-PC 781 Version 4.1x Menu operation RC8CE202 © Danfoss 03/2013 11
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
Shr2 °C (ONLY at CO2). Temperature at sensor Shr2
Stw2 °C (ONLY at CO2). Temperature at sensor Stw2
Status heat circuit (ONLY at CO2). 0=o. 1=waiting. 2=started. 3=standard. 4=variable oset
5=max recovery. 6=stopped. 7=error.
Tw Stw8 °C (ONLY at CO2). Temperature at sensor Stw8. Tap water
Tw Status (ONLY at CO2). 0=o. 1=waiting. 2=started. 3=hot tap water. 5=manual.
6= stopped. 7=error. 8=Flow error. 9=sensor error. 10=boiling.
Tw enable (ONLY at CO2). Readout about tap water circuit can be activated automatically
Hr Shr8 °C (ONLY at CO2).Temperature at sensor Shr8. Heat circuit
Hr Status (ONLY at CO2). 0=o. 1=waiting. 2=started. 3=heat circuit. 5=manual.
6= stopped. 7=error. 8=Flow error. 9=sensor error. 10=boiling.
Hr enable (ONLY at CO2). Readout about heat circuit can be activated automatically
HR thermostat temp°C (Not at CO2). Actual temperature at sensor for heat recovery function
Heat recovery status (Not at CO2). Status on heat recovery function (on/o)
Settings Main switch Main switch: ON: Regulation
OFF: Controller stopped
Tw setpoint °C (ONLY at CO2). Set point for tap water temperature
Hr setpoint °C (ONLY at CO2). Set point for heat circuit temperature
Pgc HR max. oset (ONLY at CO2). Displacement pressure of max. signal
Pgc HR min. Bar (ONLY at CO2). Set point at min. signal
Heat recovery SP °C (Not at CO2). Reference for condenser pressure when heat recovery is on
HR temp. cutin °C (Not at CO2). Temperature value when thermostat switch to heat recovery
HR temp. cutout °C (Not at CO2). Temperature value when thermostat switch o the heat recovery
Alarm priorities
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 Comp. 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
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
Log only = 4
Overriding the alarms is dened with setting = 0
Main Switch 0/1/2/3/4
Low P0 0/1/2/3/4

Danfoss AK-PC 781 Specifications

General

Brand	Danfoss
Model	AK-PC 781
Category	Controller
Language	English