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Tripped high pressure switch
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, see Maintenance.
Possible cause 3: Not enough fl ow over the heat pump.
Action:
1. Select Acknowledge.
2. Check that the heat carrier pump has not stopped.
If an existing electric/oil-fi red boiler is connected,
the heat carrier pump is on one of the pipes.
3. 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.
4. Possibly increase the pump speed.
5. Contact your installer.
Sensor failure / short circuit
All sensors connected to the heating installation can give an alarm in the
event of a fault. In the example to the right it is sensor T3, hot water, which
has given an alarm. All sensors give alarms in the same way.
Possible cause 1: Temporar y error.
Action:
1. Wait and see.
Possible cause 2: Defective sensor or incorrect connection.
Action:
1. Contact your installer.
Increase the speed of the heat car-
rier pump:
Use a screwdriver or a coin to increase
the speed of the heat carrier pump.
Turn one step anti-clockwise.
Note
Heat carrier pump
(Hot water distribution unit)
What to do if a fault occurs
