Fisher FSArt-120HF, Service Manual

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9.2 Indoor Unit Error Display
Display STATUS
E1 EEPROM error
E2 Zero-crossing examination error
E3 Fan speed beyond control
E4 Over current protection of the compressor occurs 4 times
E5 Open or short circuit of Room temperature sensor
E6 evaporator temperature sensor open or short circuit of
9.3 Diagnostic chart
After energizing, no indicator is lighted and the air conditioner can’t be operated.
After energizing, the air conditioner can not be operated.
Check if AC 220V power supply outputs to indoor PCB.
Check if AC 220V exists at the primary coil of transformer.
Yes
YES
No
Check if AC 14.5V exists at the secondary coil of transformer.
Indoor PCB is defective.
Take off the secondary plug of transformer, and then check if AC
14.5V exists at the secondary coil of transformer.
No
Yes
Yes
Indoor PCB is defective. Indoor PCB is defective.
No
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