9. TROUBLESHOOTING
9-1. Check before and after troubleshooting
9-1-2. Check inter-unit wiring.
Check that inter-unit wiring is correctly connected between indoor unit and outdoor unit.
9-1-3. Check power supply.
Check that voltage is in specified range (+/–10% of the rating).
Check that power is being supplied.
9-1-4. Check lead wires and connectors in indoor and outdoor units.
Check that coating of lead wires is not damaged.
Check that lead wires and connectors are firmly connected.
Check that wiring is correct.
9-1-1. Check power supply wiring.
Check that power supply wires are correctly connected to terminals L and N on the terminal plate in the outdoor
unit.
WARNING
Hazardous voltage can cause ELECTRIC SHOCK or
DEATH. Disconnect power or turn off circuit breaker
before you start checking or servicing.
Grounding line
Grounding
line
INDOOR
UNIT
OUTDOOR
UNIT
1
2
3
Terminal
Inter-unit wiring
1
2
3
N
L
Terminal
Power supply
Single-phase 220-240VAC 50Hz
L
N
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