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Electrify the machine again and turn it on
with the remote controller, If malfunctions
are reported before or upon the compressor
being started up,
The compressor is started normally, but
malfunctions are reported after it has
run for some time. Check the power
supply is too low or too high
The system may have been over or under
charged with gas, which can be judged through
the pressure of the measuring system.
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
■
Troubleshooting
* Caution Be sure to turn off power switch before connect or disconnect connector,
parts damage may be occurred.
NO
NO
NO
Communication wiring disconnected
YES
IPM Module is damaged and
needs replacing.
Yes
Repair the power supply
33
Installations
Domestic air conditioner
or else
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