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Motor cut-out compressor (MB1)
Possible cause 1: Intermittent fault or overload on the power supply.
Action:
1. Press the Ackn. button.
The alarm indication goes out even if the fault has
not been rectifi ed.
2. Reset the motor cut-out on the heat pump (Fuse 1).
3. Wait for the heat pump to start.
Possible cause 2: Current level (A) on the motor cut-out is set too
low.
The current drawn by the compressor varies during
summer/winter operations.
Action:
1. Contact the Technical Support Department.
Possible cause 3: Contactor or cut-out faulty, or loose electrical
connections to the compressor.
Action:
1. Contact the Technical Support Department.
Possible cause 4: Compressor error.
Action:
1. Contact the Technical Support Department.
Motor cut-out HTF pump (MB2)
Possible cause 1: The HTF pump is blocked due to contamination.
Action:
1. Press the Ackn. button.
2. Loosen the vent screw and remove the dirt.
3. The pump may be freed with the aid of a small
screwdriver. The alarm indication goes out even if
the fault has not been rectifi ed.
Possible cause 2: Faulty electric motor on HTF pump.
Action:
1. Contact the Technical Support Department.
Possible cause 3: Temporar y error.
Action:
1. Contact the Technical Support Department at
repeated alarms.
The menu display shows:
ALARM (MB1)
Compr. circ. switch
060822 16:08:15
Info Ackn.
The menu display shows:
ALARM (MB2)
HTF c-pump switch
060822 16:08:15
Info Ackn.
The reset switch for the compres-
sor can be found under heading
Fuses and resetting buttons on the
heat pump.
The alarm indication goes out when
acknowledging the alarm even if the
fault has not been rectifi ed.
Note
Note
What to do if a fault occurs
