Ferroli OMNIA M 3.2 Installation And Owner's Manual page 173

High pressure switch protection
Compressor overcurrent
protection.
High discharge temperature
protection.
High temperature protection of
refrigerant outlet temp of
condenser.
Heating mode, DHW mode:
1. The water flow is low; water temp is high, whether there is
air in the water system. Release the air.
2. Water pressure is lower than 0.1Mpa, charge the water to let
the pressure in the range of 0.15~0.2Mpa.
3. Over charge the refrigerant volume. Recharge the refrigerant
in right volume.
4. Electrical expansion valve locked or winding connector is
loosen. Tap-tap the valve body and plug in/ plug off the
connector for several times to make sure the valve is working
correctly. And install the winding in the right location DHW
mode: Water tank heat exchanger is smaller .Cooling mode:
1.Heat exchanger cover is not removed. Remove it.
2. Heat exchanger is dirty or something is block on the surface.
Clean the heat exchanger or remove the obstruction.
1.The same reason to P1.
2. Power supply voltage of the unit is low, increase the power
voltage to the required range.
1.The same reason to P1.
2.TW_out temp.sensor is loosen Reconnect it..
3. T1 temp.sensor is loosen. Reconnect it.
4. T5 temp.sensor is loosen. Reconnect it.
1. Heat exchanger cover is not removed. Remove it.
2. Heat exchanger is dirty or something is block on the surface.
Clean the heat exchanger or remove the obstruction.
3. There is no enough space around the unit for heat
exchanging.
4. fan motor is broken, replace a new one.
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