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9. TROUBLESHOOTING
9-1. Check before and after troubleshooting
WARNING
Hazardous voltage can cause ELECTRIC SHOCK or
DEATH. Disconnect power or turn off circuit breaker
before you start checking or servicing.
9-1-1. Check power supply wiring.
Check that power supply wires are correctly connected to terminals No. 1 and No. 2 on the 3P-terminal plate
in the outdoor unit.
9-1-2. Check inter-unit wiring.
Check that inter-unit wiring is correctly connected to the indoor unit from the 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.
Inter–unit
Indoor
Outdoor
power wiring
unit
unit
1
2
Ground
4
5
6
7
8
Inter–unit
control wiring
28
1
1
2
2
4
4
5
5
6
6
7
7
8
Power supply :
1
1-phase, 50Hz
2
240VAC
Ground
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