31
3. Check EEV step.
4. Check the compressor frequency and current.
5. If they are OK, replace a new compressor driver
board.
F20
IGBT Power Device
Overheat Alarm
1. Check the fans are running or not.
2. Check the installation distance and space.
3. If they are OK, please replace a new
compressor driver board.
4. Leave enough distance and space to make heat
pump have a good transfer heating condition.
5. Clean air to fin heat exchanger.
F22
AC input overcurrent
protection alarm
Only in single phase unit. Restart the unit.
1. Check if there is electric leakage.
2. If still have the failure, replace a new drive
board.
F23
EEPROM Fault
Alarm
1. Check the connection;
2. Replace a new driver board;
F24
Destroyed EEPROM
Activation Ban Alarm
F25
LP 15V Underload
Fault
1. Check the power supply is stable or not, and
restart unit.
2. If the problem still on, please replace a new
drive board.
F26
IGBT Power Device
Overheat Fault
1. Check the fans are running or not
；
2. Check the installation distance and space;
3. Leave enough distance and space to make heat
pump have a good transfer heating condition;
4. Clean the finned heat exchanger.
5. If they are OK, please replace a new driver
board;
F031
DC Fan Motor 1
Failure
1. Turn off the unit and check the connection.
2. Restart and check if the motor is running normal
or the error happens again.
3. Replace a new fan motor.
F032
DC Fan Motor 2
Failure
Pp1
Exhaust Pressure
Sensor Fault
1. Detect the exhaust pressure sensor connection
2. If the connection is OK, please replace a new
one.
Pp2
Suction Pressure
Sensor Fault
1. Detect the suction pressure sensor connection
2. If the connection is OK, please replace a new
one.
