AK-PC 772A
Capacity
controller RS8HF102 © Danfoss 2017-07
117
Various alarms
Standby mode
Medium
Control stopped,
MainSwitch=OFF
The control has been stopped via the setting ”Main switch” = Off or
the external Main switch is off
Thermostat x – Low
temp. alarm
Low
Thermostat x - Low alarm
The temperature for thermostat no. x has been below the low alarm
limit for longer time than set delay
Thermostat x – High
temp. alarm
Low
Thermostat x - High alarm
The temperature for thermostat no. x has been above the high alarm
limit for longer time than set delay
Pressostat x – Low pres-
sure alarm
Low
Pressostat x - Low alarm
The pressure for pressostat no. x has been below the low alarm limit
for longer time than set delay
Pressostat x – alarm limit
high pressure
Low
Pressostat x - High alarm
The pressure for pressostat no. x has been above the high alarm
limit for longer time than set delay
Voltage input x – Low
alarm
Low
Analog input x - Low alarm
The voltage signal has been below the low alarm limit for longer
time than set delay
Voltage input x – High
alarm
Low
Analog input x - High alarm
The voltage signal has been above the high alarm limit for longer
time than set delay
User def. alarm text
Low
Custom alarm x -define text
Alarm on general alarm input DI x
Receiver alarm
High
Prec...
Alarm from the receiver
External power loss
High
External power loss
Supply is interrupted. A message alert. All other alarms stopped.
Steppervalve
High
Defect supply to valve coil
Stepper - Vhp, Vrec, PI, Vliq.
Open coil, Shorted output,
Error, Power failure
Check the supply to the actual valve.
In the event of an error or power failure: check the supply to
the stepper module.
System alarms
The alarm priority can not be altered on system alarms
Control mode
Low
Manual comp. cap. Control A
Compressors capacity control runs i manual mode
Control mode
Low
Manual cond. cap. Control A
Condense capacity control runs i manual mode
Refrigerant changed
Low
Refrigerant changed
Refrigerant type has been changed
Medium
Time has not been set
Time has not been set
Medium
System Critical exception
A unrecoverable critical system failure has occurred – exchange the
controller
Medium
System alarm exception
A minor system failure has occurred – power off controller
Medium
Alarm destination disabled
When this alarm is activated the alarm transmission to the alarm
receiver has been deactivated. Check and wait.
When the alarm is cleared the alarm transmission to the alarm
receiver has been activated again
Medium
Alarm route failure
Alarms can not be transmitted to alarm receiver – check communi-
cation
High
Alarm router full
The internal alarm buffer has an overrun – this might occur if the
controller can not send the alarms to the alarm receiver. Check com-
munication between controller and system unit.
Medium
Device is restarting
The controller is restarting after flash updating of the software
Medium
Common IO Alarm
There is a communication fault between the controller module and
the extension modules – the fault must be corrected as soon as
possible
Manual control
Low
MAN DI……….
The in put in question has been put in manual control mode via the
AK-ST 500 service tool software
Low
MAN DO………
The output in question has been put in manual control mode via the
AK-ST 500 service tool software
Low
Man set ....
The output in question has been put in manual control mode via the
AK-ST 500 service tool software
Low
Man control .....
The output in question has been put in manual control mode via the
AK-ST 500 service tool software
