SiAF332111E Troubleshooting by Error Code
Part 6 Service Diagnosis 291
5.53 Incorrect Inverter and Fan Drive Combination
Applicable
Models
RXQ4/5AR, RXMQ10/12AR
Error Code PJ
Method of Error
Detection
Test is performed based on communication with inverter.
Error Decision
Conditions
Communication data is used to determine if the types of the inverter PCB and fan PCB are
correct.
Supposed
Causes
Inconsistent PCB type
Wrong field setting
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
YES
YES
YES
NO
Repair the wiring connection.
Replace the outdoor
unit main PCB (A1P).
NO
Set the dip switch
correctly. (Reset the
power after setting up
the switch)
NO
Replace with the
correct PCB.
Is the
outdoor unit main
PCB readiness indicator
light (H2P) off?
Is the dip
switch correctly set
when replacing the
outdoor unit main
PCB?
Does
the PCB part
No. match that of the
spare parts
list?
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