Defrost Alarm; Unknown Hp Box Alarm; Heating Overheat Alarm; Heating Limitation Alarm - ComfortZone RX35 User And Installation Manual

ComfortZone RX35/RX50/RX65
Measure:

13.9 Defrost alarm

Cause:
Measure:
13.10

Unknown HP box alarm

Cause:
Measure:
13.11

Heating overheat alarm

Cause:
Measure:
13.12

Heating limitation alarm

Cause:
Measure:
13.13

Heating return max alarm

return later.
- Check that the cables are properly connected.
(LL) Check that the connector is firmly attached to
the control board.
(MM) Check the sensor resistance.
(NN) If no fault can be found, change the sensor anyway.
- The defrost does not end within the given time limit (60 min).
Usually depends on incorrect sensor (TE7).
- Replace TE7 sensor.
-The controller cannot identify the VP box.
Probably due to a broken electrical contact or connection failure.
- Check all signal cables and connectors.
- The alarm limit set for maximum supply temperature
(TE1) is exceeded. (= Max supply temperature +5 K.)
Probably due to lack of circulation.
Can also be because the elements in the radiator circuit
are out of order, are too small or that push pumps are not
operating.
Factory setting for alarm limit is:
For underfloor heating 45 ° C (Max supply 40°
For radiator heating 75 ° C (Max supply 70 °
- Check that the valves for the circulation circuit are open.
- For indoor temperature control, check that at
least half of the room thermostats are fully open
(max. Position).
- Make sure that heat comes out to the elements /
floor heating distributor.
- Check that any over-temperature protection in the floor
heating distributor does not stop the circulation.
- Check that the circulation pump (and any push pumps)
are running. The circulation pump has a built-in
overheat protection which is reset by breaking the
current.
The alarm activates when the temperature limitation of the
supply temperature has completely switched off the
compressor. Due to poor circulation and / or high return
temperature.
See section 16.12 Heating overheat.
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service & maintenance