ERROR CODE
MALFUNCTION OR
PROTECTION
FAILURE CAUSE
AND CORRECTIVE ACTION
Communication error between
inverter module PCB A and
main control board PCB B
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.
The plate heat exchanger
refrigerant inlet(liquid pipe)
temperature sensor(T2) error.
1. The T2 sensor connector is loosen. Reconnect 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.
The plate heat exchanger
refrigerant outlet(gas pipe)
temperature sensor (T2B )
error.
1. The T2B sensor connector is loosen. Reconnect 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.
Three times P6 protect
Same to P6
The indoor temperature
sensor(Ta) error
1. The Ta senor is in the interface;
2. The Ta sensor failure, change a new sensor or change a new
interface.
The DC fan failure
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.
Main circuit voltage failure
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.
3. the circuit defect part of Main control board is defective.
Replace a new Main PCB.
Pressure sensor failure
1. Pressure sensor connector is loosen, reconnect it.
2. Pressure sensor failure. change a new sensor.
The system outlet water
temperature sensor T1B failure.
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.
The plate heat exchanger water
outlet temperature sensor (TW_
out) error.
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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