Service manual

102
14
Troubleshooting
Diagnostic Procedure for Check Code
Check code Operation cause
1. Fixed-speed compressor high-pressure SW error
2. Fixed-speed compressor IOL operation
[E1] 3. Service valve closed
Fixed-speed high-pressure 4. Outdoor fan, capacitor error
SW system alarm (1) 5. Indoor/Outdoor PMV blockage
[F0] 6. Outdoor heat exchanger blockage
Fixed-speed high-pressure 7. SV2 circuit blockage
SW system alarm (2) 8. Miswiring of communication between indoor and
outdoor units
9. Pd sensor error
10. Refrigerant over-charge
Does the fixed-speed
high-pressure SW operate?
Is the capacitor and
fan motor normal?
Are the characteristics of
high-pressure sensor normal?
Are the fixed-speed high-
pressure SW parts normal?
Is service valve fully open?
Does outdoor fan
operate?
Refrigerant over charge
Blockage
Pipe breakage
Abnormal overload
Eliminate cause.
Check parts.
If defective, replace.
Open service valve fully.
Check and correct wiring.
Repair failed position.
Replace high-pressure sensor.
Is fixed-speed
IOL circuit normal?
Check outdoor interface P.C. board.
If defective, replace.
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Is the outdoor heat
exchanger blocked or is a short
circuit evident?
Yes
No
Is the circuit wiring normal?
See the judgment code
of fixed-speed IOL,
OL circuits "E6" "F1".
See the judgment code
of fixed-speed IOL,
OL circuits "E6" "F1".
[E1]: High-pressure SW system error compressor 1 side
[F0]: High-pressure SW system error compressor 2 side
Is fixed-speed
OCR circuit normal?
No
Yes
No
Yes