Troubleshooting for Outdoor Unit SiUS121736EA
183 Service Diagnosis
7.3 Wiring Error Check Unexecuted
Error Code U3
Outdoor Unit LED
Display
A j 1 h 2 i 3 h 4 h 5 h
Method of Error
Detection
The system checks if wiring error check is executed after clearing the memory.
Error Decision
Conditions
An error is determined when the unit is operated by the remote controller without executing wiring
error check after the memory was cleared.
Supposed
Causes
The wiring error switch (SW3) may have been pressed for 10 seconds or more and the memory
may have been deleted. The unit cannot be operated unless wiring error check is executed.
Troubleshooting
Note: Refer to wiring error check on page 223 for details.
(R23952)
Caution
NO
YES
Wiring error check
executed?
Conduct wiring error check.
Wiring error check may not
have been finished because of
the trouble of indoor/outdoor
unit.
Conduct wiring error check
again.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
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