AK-PC 572 User Guide RS8KH202 © Danfoss 2019-03 19
Alarm list
Alarm text Reason Priority
setting
Default
value
General alarms
Standby mode (Main sw. OFF) Alarm when control is stopped by internal or external Main Switch (DI input "Main Switch") Standby mode Normal
PoMT sensor error Pressure transmitter signal from PoMT defective
Sensor error Normal
PoLT sensor error Pressure transmitter signal from PoLT defective
SsMT sensor error Temperature signal from SsMT suction gas temp. defective
SsLT sensor error Temperature signal from SsLT suction gas temp. defective
SdMT sensor error Temperature signal from SdMT discharge gas temp. Sd defective
SdLT sensor error Temperature signal from SdLT discharge gas temp. Sd defective
Pgc sensor error Pressure transmitter signal from Pgc defective
Prec sensor error Pressure transmitter signal from Prec defective
Sgc sensor error Temperature signal from Sgc defective
Sc3 sensor error Temperature signal from Sc3 defective
Output in manual mode An output is set in manual mode Output in MAN mode Normal
Suction MT alarms
PoMT Low suction pressure Minimum safety limit for suction pressure PoMT has been violated
Low pressure PoMT Normal
LP safety switch cut out MT Low safety limit for external low pressure switch has been violated (DI input "LP switch MT")
PoMT High suction pressure High alarm limit for PoMT has been exceeded High pressure PoMT Critical
SsMT High superheat Superheat in suction line MT too high (measured by PoMT and SsMT)
Superheat MT Normal
SsMT Low superheat Superheat in suction line MT too low (measured by PoMT and SsMT)
SdMT High discharge temp. Safety prevention limit for SdMT discharge temperature has been exceeded (10K below safety limit) High disch. temp.SdMT Critical
Comp. 1MT High disch. temp Safety limit for discharge gas temperature has been exceeded
Compressor safety
cutout MT
Normal
Comp 1-3MT safety cut out Compressor no. 1-3 MT has been cut out on general safety input (DI1, DI2, DI3)
Suction LT alarms
PoLT Low suction pressure Minimum sikkerhed grænse for sugetryk PoLT er blevet koblet ud Low pressure PoLT
Normal
LP safety switch cut out LT Low safety limit for external low pressure switch has been violated (DI input "LP switch LT")
PoLT High suction pressure High alarm limit for PoLT has been exceeded High pressure PoLT Critical
SsLT High superheat Superheat in suction line LT too high (measured by PoLT and SsLT)
Superheat LT Normal
SsLT Low superheat Superheat in suction line LT too low (measured by PoLT and SsLT)
SdLT High discharge temp. Safety prevention limit for SdLT discharge temperature has been exceeded (10K below safety limit) High disch. temp. SdLT Critical
Comp. 1LT High disch. temp Safety limit for discharge gas temperature has been exceeded
Compressor safety
cutout LT
Normal
Comp 1-2LT safety cut out Compressor no. 1-2 LT has been cut out on general safety input (DI7, DI8)
Gas cooler alarms
Prec high alarm limit Alarm from the receiver High receiver pressure
High gas cooler pressure Pgc registrer a too high pressure High pressure Pc Critical
Common fan alarm A fan is reported as defective via the shared safety input (DI input "Fan Alarm") Fan Alarm Normal
Display alarm
EER31 See next page
Sensor alarms
Sensor alarms shut off automatically when the sensor has been O.K. for 10 minutes.
If you have corrected the sensor error and want to perform a manual, forced removal of the alarm, go to the “Alarm detail display”
Press and hold the “X” key for 2 seconds here.
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