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Low temperature in condenser
The alarm is due to low temperature in the heat pump. A warning window is
initially displayed. After 4 repeated warnings (within 2 hours), an alarm is given.
Possible cause 1: Air in the heating system.
Action: 1. Select Acknowledge.
2. Check whether there is air in the radiators.
3. Fill the heating system and vent if necessary.
Possible cause 2: Particle fi lter is clogged.
Action: 1. Select Acknowledge.
2. Check the fi lter.
3. Clean the fi lter if necessary.
Possible cause 3: Faulty heat carrier pump.
Action: 1. Check that the heat carrier pump has not stopped (see
Tripped high pressure switch).
2. Contact your dealer.
Possible cause 4: Not enough/no fl ow over the heat pump.
Action: 1. Check that the heat carrier pump has not stopped.
2. Check that all the valves are open. In heating systems
with thermostat valves these should be fully open and
in underfl oor heating systems at least half of the coils
should be fully open.
Possible cause 5: Insuffi cient water level in the house’s heating
system.
Action: 1. Contact your dealer.
Tripped motor cut-out compressor
Possible cause 1: Intermittent fault or overload on the power supply.
Action: 1. Select Acknowledge.
2. Wait for the heat pump to start.
3. If the fault returns, contact your dealer.
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 your dealer.
Possible cause 3: Contactor or cut-out faulty, or loose electrical con-
nections to the compressor.
Action: 1. Contact your dealer.
Possible cause 4: Compressor error.
Action: 1. Contact your dealer.
What to do if a fault occurs
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