Ferroli OMNIA HYBRID C, Installation, Maintenance And User Manual

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74
EN
Cod. 3541T090 - Rev. 00 - 06/2019
ALARMS
11. ALARMS
11.1 Heat pump alarms
This section provides useful information for diagnosing and correcting some problems that may occur in the unit.
Troubleshooting and related corrective actions can only be performed by the technical assistance service.
Before starting the troubleshooting procedure, carry out a complete visual inspection of the unit and look for obvious defects, such as loose connections or faulty wiring.
If you need to access and control the electrical panel of the unit, always remove the power supply to the unit
and to the various loads managed by it.
When a safety device intervenes, stop the unit and after understanding and removing the cause of the problem it will be possible to reset the device itself and restart
the unit. In no case is the operation of the unit allowed with safety devices bypassed or modified to a intervention value different from the factory setting. If you cannot
find the cause of the problem, contact the technical assistance service.
Possible malfunctioning
The unit is turned on but the unit is not heating or cooling as expected
POSSIBLE CAUSES CORRECTIVE ACTION
The temperature setting
is not correct.
Check the controller set point.T4HMAX, T4HMIN in heat mode.T4CMAX,T4CMIN in cool mode.T4DHWMAX,T4DHWMIN in DHW
mode.
The water flow is too
low.
• Check that all shut off valves of the water circuit are completely open.
• Check if the water filter needs cleaning.
• Make sure there is no air in the system (purge air).
• Check on the manometer that there is sufficient water pressure. The water pressure must be>1 bar (water is cold).
• Make sure that the expansion vessel is not broken.
• Check that the resistance in the water circuit is not too high for the pump
The water volume in the
installation is too low.
Make sure that the water volume in the installation is above the minimum required value (refer to "9.3 water pipework/Checking the
water volume and expansion vessel pre-pressure").
Pump is making noise (cavitation)
POSSIBLE CAUSES CORRECTIVE ACTION
There is air in the system. Purge air.
Water pressure at pump
inlet is too low.
• Check on the manometer that there is sufficient water pressure. The water pressure must be > 1 bar (water is cold).
• Check that the manometer is not broken.
• Check that the expansion vessel is not broken.
• Check that the setting of the pre- pressure of the expansion vessel is correct (refer to "9.3 water
pipework/Checking the water volume
and expansion vessel pre-pressure").
The water pressure relief valve opens
POSSIBLE CAUSES CORRECTIVE ACTION
The expansion vessel is
broken.
Replace the expansion vessel.
The filling water pressure in
the installation is higher than
0.3MPa.
Make sure that the filling water pressure in the installation is about 0.15~0.20MPa (refer to "9.3 water
pipework/Checking the water volume and expansion vessel pre-pressure").
The water pressure relief valve leaks
POSSIBLE CAUSES CORRECTIVE ACTION
Dirt is blocking the water
pressure relief valve outlet.
Check for correct operation of the pressure relief valve by turning the red knob on the valve counter clockWise:
• If you do not hear a clacking sound, contact your local dealer.
• In case the water keeps running out of the unit, close both the water inlet
and outlet shut-off valves first and then contact your local dealer.