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OMNIA M 3.2
ERROR
MALFUNCTION OR
CODE
PROTECTION
The condenser outlet
refrigerant temperature sensor
(T3) fault.
The ambient temperature
sensor (T4) fault.
The balance tank up temp.
sensor (Tbt1) fault.
Water flow fault.
Compressor suction temp,
sensor (Th) fault.
Compressor discharge temp,
sensor (Tp) fault.
Solar panel temp.sensor
(Tsolar) fault.
22T÷30T
1. Check the resistance of the sensor
2. The T3 sensor connector is loosen. Reconnect it.
3. The T3 sensor connector is wet or there is water in. remove the water,
make the connector dry. Add waterproof adhesive
4. The T3 sensor failure, change a new sensor.
1. Check the resistance of the sensor
2. The T4 sensor connector is loosen. Reconnect it.
3. The T4 sensor connector is wet or there is water in. remove the water,
make the connector dry. Add waterproof adhesive
4. The T4 sensor failure, change a new sensor.
1. Check the resistance of the sensor.
2. The Tbt1 sensor connector is loosen, reconnect it.
3. The Tbt1 sensor connector is wet or there is water in, remove the water.
make the connector dry. Add waterproof adhesive.
4. The Tbt1 sensor failure, change a new sensor.
Check that all shut off valves of the water circuit are completely open.
1. Check if the water filter needs cleaning.
2. Refer to "9.4 Charging water"
3. Make sure there is no air in the system (purge air).
4. Check on the manometer that there is sufficient water pressure. The water
pressure must be >1 bar.
5. Check that the pump speed setting is on the highest speed.
6. Make sure that the expansion vessel is not broken.
7. Check that the resistance in the water circuit is not too high for the pump
(refer to "Setting the pump speed").
8. If this error occurs at defrost operation (during space heating or domestic
water heating), make sure that the backup heater power supply is wired
correctly and that fuses are not blown.
9. Check that the pump fuse and PCB fuse are not blown.
1. Check the resistance of the sensor.
2. The Th sensor connector is loosen. Reconnect it.
3. The Th sensor connector is wet or there is water in. remove the water,
make the connector dry. Add waterproof adhesive
4. The Th sensor failure, change a new sensor.
1. Check the resistance of the sensor.
2. The Tp sensor connector is loosen. Reconnect it.
3. The Tp sensor connector is wet or there is water in. remove the water,
make the connector dry. Add waterproof adhesive
4. The Tp sensor failure, change a new sensor.
1. Check the resistance of the sensor.
2. The Tsolar sensor connector is loosen, reconnect it.
3. The Tsolar sensor connector is wet or there is water in, remove the water,
make the connector dry. Add waterproof adhesive.
4. The Tsolar sensor failure, change a new sensor.
Cod. 3QE47660 - Rev. 00 - 02/2022
FAILURE CAUSE AND CORRECTIVE ACTION
143
EN
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