28
/ Swimming Pool Heat Pump Inverboost C
Malfunction
Error code
Reason
Solution
Current detection
circuit failure
EE22
1. Voltage signal abnormal
2. Driver board is damaged
3. Main board failure
1. Change a new main board
2. Change a new driver board
Compressor start
failure
EE23
1. Main board is damaged
2. Compressor wiring
error or poor contact or
unconnected
3. Liquid accumulation inside
4. Wrong phase connection
for compressor
1. Check the main board or
change a new one
2. Check the compressor wiring
according to the circuit
diagram
3. Check the compressor or
change a new one
Ambient
Temperature device
failure on Driver
board
EE24
Ambient Temperature device
failure
Change driver board or main
board
Compressor phase
failure
EE25
Compressors U, V, W are just
connected to one phase or
two phases.
Check the actual wiring
according to the circuit diagram
Four-way valve
reversal failure
EE26
1. Four-way valve reversal
failure
2. Lack of refrigerant
(no detect when TH2
or TH1 malfunction)
1. Switch to Cooling mode to
check the 4-way valve if it has
been reversed correctly
2. Change a new 4-way valve
3. Fill with gas
EEPROM data read
malfunction
EE27
1. Wrong EEPROM data in the
program or failed input of
EEPROM data
2. Main board failure
1. Re-enter correct EEPROM data
2. Change a new main board
The inter-chip
communication
failure on the main
control board
EE28
Main board failure
1. Stop electricity supply and
restart it
2. Change a new main board
