Disruptions in operation, alarms and troubleshooting
Owner’s Manual 57
ENGLISH
After fixing the cause for the error you have to restart the device with the key (ENTER)
- hold it for 3 seconds. After the startup sequence elapses the device will start operating.
Errors and alarms in backup operation mode
Service operation mode
(BACKUP)
Description of error
DHW-Res.source-
The device operates in service mode. The DHW is heated in auxiliary mode with
the help of the auxiliary flow electric heater source.
Heating-
Res.source-
The device operates in backup mode. The heated water is heated in auxiliary mode
with the help of the auxiliary flow electric heater source.
FP PROG (2. Line)
The antifreeze programme activates in case of a serious error in the heat pump
system. It maintains the temp. of 25 °C in the heating system. It uses the built-in
flow electric heater.
Max. dT The temperature difference between the supply and return is too high.
After fixing the cause for the error you have to restart the device with the key (ENTER)
- hold it for 3 seconds. After the startup sequence elapses the device will start operating.
Errors and alarms in normal operation mode
Display of alarms Description of error
ERROR HpHeat Alarm; the pressure in the system was too high during heating.
ERROR HpDHW Alarm; the pressure in the system was too high during heating DHW.
ERROR HpCool Alarm; the pressure in the system was too high during cooling.
ERROR LpHeat Alarm; the pressure in the system was too low during heating.
ERROR LpDHW Alarm; the pressure in the system was too low during heating DHW.
ERROR LpCol Alarm; the pressure in the system was too low during cooling.
ERROR Tz
Alarm; there was overvoltage, under voltage or inverted phase sequence in the
electrical grid.
ERROR **NO WATER**
Alarm; there was a switch of the heat source pump or shortage of water for the
heat source (Flow error / Flow switch open)
ERROR ... SENSORS ... Alarm; one of the sensors is not connected or is damaged.
Too low T-outlet Alarm; the temperature of exit water is too low.
Defrost T.Flow ALARM Alarm; the inlet water temperature during defrost is too low.
ALARM DHW The device was unable to increase the water temperature, retry 3x time.
? EFFICIENCY? The device does not heat (does not generate enough heat).
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