62
ERROR
CODE
MALFUNCTION
OR PROTECTION
FAILURE CAUSE
AND CORRECTIVE ACTION
The condenser outlet
refrigerant temperature sensor
(T3) fault.
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.
The ambient temperature
sensor (T4) fault.
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.
The balance tank up temp.
sensor (Tbt1) fault.
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.
Water flow fault.
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.
Compressor suction temp.
sensor (Th) fault.
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.
Compressor discharge temp.
sensor (Tp) fault.
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.
Solar panel temp.sensor
(Tsolar) fault.
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.
V.2
Summary of Contents for ETH220VMA
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