SiAF332111E Troubleshooting by Error Code
Part 6 Service Diagnosis 307
5.59 Check Operation Not Executed
Applicable
Models
All outdoor unit models
Error Code U3
Method of Error
Detection
The check operation has not been executed.
Error Decision
Conditions
Error is decided when the unit starts operation without check operation.
Supposed
Causes
Check operation not executed
Troubleshooting RXQ4/5AR
Press the TEST (BS4) button on
master outdoor unit main PCB
(A1P) for 5 seconds or longer to
check operation.
Replace the outdoor unit main
PCB (A1P).
Has the
check operation been
performed on outdoor unit
main PCB?
NO
YES
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
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