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ERROR
MALFUNCTION
CODE
OR PROTECTION
Communication error between
inverter module PCB A and
main control board PCB B
The plate heat exchanger
refrigerant inlet(liquid pipe)
temperature sensor(T2)
error.
The plate heat exchanger
refrigerant outlet(gas pipe)
temperature sensor (T2B )
error.
Three times P6 protect
The indoor temperature
sensor(Ta) error
The DC fan failure
Main circuit voltage failure
Pressure sensor failure
The system outlet water
temperature sensor T1B
failure.
The plate heat exchanger
water outlet temperature
sensor (TW_out) error.
FAILURE CAUSE
AND CORRECTIVE ACTION
1. Whether there is power connected to the PCB and driven
board. Check the PCB indicator light is on or off. If Light is off,
reconnect the power supply wire.
2.if light is on, check the wire connection between the main
PCB and driven PCB, if the wire loosen or broken, reconnect
the wire or change a new wire.
3. Replace a new main PCB and driven board in turn.
1.The T2 sensor connector is loosen. Re connect it.
2.The T2 sensor connector is wet or there is water in. remove
the water, make the connector dry. Add waterproof adhesive
3. The T2 sensor failure, change a new sensor.
1. The T2B sensor connector is loosen. Re connect it. 2.The
T2B sensor connector is wet or there is water in. remove the
water, make the connector dry. Add waterproof adhesive
3. The T2B sensor failure, change a new sensor.
Same to P6
1. The Ta senor is in the interface;
2. The Ta sensor failure， change a new sensor or change a
new interface.
1. Strong wind or typhoon below toward to the fan, to make the
fan running in the opposite direction. Change the unit direction
or make shelter to avoid typhoon below to the fan.
2.fan motor is broken, change a new fan motor.
1. Whether the power supply input is in the available range.
2. Power off and power on for several times rapidly in short time.
Remain the unit power off for more than
3 minutes than power on.
4. the circuit defect part of Main control board is defective.
Replace a new Main PCB.
1. Pressure sensor connector is loosen, reconnect it.
2. Pressure sensor failure. change a new sensor.
1. The T1B sensor connector is loosen. Reconnect it. 2.The
T1B sensor connector is wet or there is water in. remove the
water, make the connector dry. add waterproof adhesive
3. The T1B sensor failure, change a new sensor.
1. The TW_out sensor connector is loosen. Reconnect it. 2.The
TW_out sensor connector is wet or there is water in. remove
the water, make the connector dry. add waterproof adhesive
3. The TW_out sensor failure, change a new sensor.
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