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Fault xxx
Fault of the outdoor unit or communication. The outdoor unit signals a fault state. If this fault occurs once, it is advisable
to try to restart the entire system by switching off all heat pump circuit breakers and switching them on again. If the outdoor
unit or communication fault persists after the user interface restarts, call a service organization.
Fault xxx
Low water pressure. If the heating system pressure is lower than .8 bar, the device stops operating in order to avoid
damage to the circulating pump.
The usual cause is leaking heating water. There may also be damage to the expansion vessel or air leak from its bag. To
remove the fault, increase the water pressure in the heating system to .–. bar.
If the pressure drop reoccurs, contact a service organization.
Error may also result in a clogged pressure sensor restrictor. This sensor has a millimetre hole as protection
against pressure shocks of the sensor. If water contains too many free minerals, they settle on this hole and block
the sensor. The hole must be cleaned and the heating water quality checked and, if necessary, improved.
Fault xxx
Faulty temperature sensor of the MX communication module. This fault means that the temperature sensor of the out-
door unit exchanger exhibits values outside the valid range and it is apparently faulty. For this reason, the heat pump stops
running, as the loss of information about the exchanger temperature may lead to its damage.
In the event of this fault, contact a service organization.
Fault xxx a xxx
Faulty temperature sensor of output water. If the heating water temperature sensor fails, the heat pump stops running,
because the indoor unit can be damaged due to an unknown temperature of output water.
The temperature sensor must be repaired or replaced with a new one, so contact a service organization.
Fault xxx a xxx
Faulty temperature sensor of return water. If the return water temperature sensor fails, the heat pump stops running,
because the indoor unit can be damaged due to an unknown temperature of return water.
The temperature sensor must be repaired or replaced with a new one, so contact a service organization.
Fault 6
If the bivalent weekly limit is exceeded, the auto-reset of errors will be disabled and the machine will stop. Can be reset
by turning on the Autoreset switch. This will also reset the counter. The limit value in hours is set in the service menu. Preset
to hours, when the limit is set to 68 hours, the function is essentially inactive.
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