Installations
Domestic air conditioner
33
lectrify the machine again and turn it on
ith the remote controller, If malfunctions
re reported before or upon the compressor
eing started up,
IPM Module is damaged and
needs replacing.
Repair the power supply
The system may have been over or under
charged with gas, which can be judged through
the pressure of the measuring system.
YES
NO
Yes
NO
he compressor is started normally, bu
alfunctions are reported after it has
un for some time. Check the powe
upply is too low or too high
NO
10.3.7 The communication fault between IPM and outdoor PCB
Outdoor display:
LED1 flash 4 times
Method of
Communication is detected by checking the IPM module and the outdoor PCB
Malfunction
Detection
Malfunction ■
The outdoor PCB broken leads to communication fault
Decision ■
The IPM module broken leads to communication fault
Conditions
Supposed ■
The outdoor PCB is broken
Causes ■
The IPM module is broken
■
Communication wiring disconnected
Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, or els
parts damage may be occurred.
To Next Page