SiUS181631EA Troubleshooting for Outdoor Unit
Troubleshooting 255
7.26 Check Operation is not Conducted
Error Code
U3
Method of Error
Detection
Check operation is executed or not
Error Decision
Conditions
When the unit starts operation without check operation
Supposed
Causes
Check operation is not executed.
Troubleshooting
Has the
check operation
performed from the
outdoor unit
PCB?
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Performs the check operation
again and completes the check
operation.
When a leakage detection
function is needed, normal
operation of charging refrigerant
must be completed. Start once
again and complete a check
operation.
Press and hold BS4 on the service
PCB (A2P) for 5 seconds or more,
or turn ON the local setting mode
2-3 to conduct a check operation.
(R13045)
NO
YES
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