Indoor Unit Error Display; Diagnostic Chart - Fisher FSArt-70HF Service Manual

9.2 Indoor Unit Error Display

Display
E1
E2
E3
E4
E5
E6

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.
Check if AC 14.5V exists at the secondary coil of transformer.
Take off the secondary plug of transformer, and then check if AC
14.5V exists at the secondary coil of transformer.
Indoor PCB is defective.
STATUS
EEPROM error
Zero-crossing examination error
Fan speed beyond control
Over current protection of the compressor occurs 4 times
Open or short circuit of Room temperature sensor
evaporator temperature sensor open or short circuit of
Yes
YES
No
No
No
Indoor PCB is defective.
Yes
Yes
Indoor PCB is defective.
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