Haier 2U14CS1ERA, Руководство по обслуживанию

Страница: 63 / 116

2U14CS1ERA-SM Service diagnosis
60
Domestic Air Conditioner
7.4.7 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
Ŷ
The outdoor PCB broken leads to communication fault
Decision
Ŷ
The IPM module broken leads to communication fault
Conditions
Supposed Ŷ
The outdoor PCB is broken
Causes Ŷ
The IPM module is broken
Ƶ
Communication wiring disconnected
Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, or
else parts damage may be occurred.
Electrify the machine again and turn it on
with the remote controller,If malfunctions
are reported before or upon the
compressor being 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
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
NO