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10. TROUBLESHOOTING
10.1 General guidelines
wiring.
WARNING
switched off.
When a safety device was activated, stop the unit and find out why the safety device was activated before resetting
it. Under no circumstances can safety devices be bridged or changed to a value other than the factory setting. If the
cause of the problem cannot be found, call your local dealer.
to the pressure relief valve to avoid water dripping out of the unit!
10.2 General symptoms
Symptom 1
Possible causes
The setting of some parameters is not correct .
The water flow is too low.
The volume of water in the installation is too low.
Symptom 2: The unit is turned on but the compressor is not starting (space heating or domestic water heating)
Possible causes
(the water temperature is too low ).
Symptom 3: Pump is making noise (cavitation)
Possible causes
The water pressure at the pump inlet is too low.
Symptom 4: The water pressure relief valve opens
Possible causes
The expansion tank is broken or drained
EN
122
Corrective action
Check the parameters
T4HMAX, T4HMIN in heating mode.
T4CMAX, T4CMIN in cooling mode
T4DHWMAX, T4DHWMIN in DHW mode.
Check if the water filter is clogged.
Check the water pressure. The water pressure must be> 1 bar (measured with cold water).
Check that the expansion tank is not broken.
Make sure that the volume of water in the installation is above the minimum required value
Corrective action
temperature (12 ° C).
Corrective action
Purge the air.
Check the water pressure.
The water pressure must be > 1 bar (measured with cold water).
Check that the expansion tank is not broken or discharged.
Check that the pre-charge of the expansion vessel is correct
Corrective action
Replace the expansion tank. Recharge the expansion tank.
Cod. 354M000010 - Rev. 03 - 06/2023
OMNIA SW-T 3.2
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