Troubleshooting
Basic Check Flow(cont.)
Preparation : multimeter (AC voltage, DC voltage, Resistance)
Consult Error Code
Is the error code related to
communication ?
No
Is the error code related to
cycle protection ?
No
Are some of the indoor units’
operation mode (cooling/heating)
different from others ?
No
Error related to outdoor controller except temperature sensor and communication between indoor unit and outdoor unit ?
No
See Error Code Table and Check
“Main checking point”
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Check point
•Cable wiring between indoor and outdoor
•Communication wire socket check on outdoor unit controller PCB
•Cycle check
•Pipe matching
Each indoor unit operation mode
Consult LED pattern on wiring diagram on outdoor controller
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