Si18-525B Troubleshooting for Outdoor Unit
Troubleshooting 387
7.21 Faulty Combination of Inverter and Fan Driver
Remote
Controller
Display
PJ
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection
Check the communication state between inverter PCB and control PCB by micro-computer.
Malfunction
Decision
Conditions
When the communication data about inverter PCB type is incorrect.
Supposed
Causes
Mismatching of inverter PCB
Faulty field setting
Troubleshooting
∗
Refer to “Field Setting from Outdoor Unit” on P166.
(Q0441)
After resetting, restart.
YES
YES
YES
Is the
PCB type
correct?
Is the field
setting when
the PCB was
replaced
correct?
Replace PCB by the correct one.
Replace the PCB.
NO
Was the PCB
replaced?
NO
Correct field setting.
NO
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
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