APP INVERBOOST XP11DCsiPX32 Benutzer- Und Servicehandbuch Seite 25

Software control
exception
Current detection circuit
failure
Compressor start failure
Ambient Temperature
device failure on Driver
board
Compressor phase
failure
Four-way valve reversal
failure
EEPROM data read
malfunction
The inter-chip
communication failure
on the main control
board
1. Compressor runs out of step
2. Wrong program
EE21
3. Impurity inside compressor causes the
unstable rotate speed
1. Voltage signal abnormal
EE22 2. Driver board is damaged
3. Main board failure
1. Main board is damaged
2. Compressor wiring error or poor contact
EE23 or unconnected
3. Liquid accumulation inside
4. Wrong phase connection for compressor
EE24 Ambient Temperature device failure
Compressors U, V, W are just connected to
EE25
one phase or two phases.
1. Four-way valve reversal failure
EE26 2. Lack of refrigerant (no detect when TH2
or TH1 malfunction)
1. Wrong EEPROM data in the program or
EE27 failed input of EEPROM data
2. Main board failure
EE28 Main board failure
1. Check the main board or change a new one
2. Update the correct program
3. Check the refrigeration system
1. Change a new main board
2. Change a new driver board
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
Change driver board or main board
Check the actual wiring according to the circuit
diagram
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
1. Re-enter correct EEPROM data
2. Change a new main board
1. Stop electricity supply and restart it
2. Change a new main board
23