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10. TROUBLESHOOTING
10-1. 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.
10-1-1. Check power supply wiring.
Check that power supply wires are correctly connect-
ed to terminals No.1 and No.2 on the terminal plate in
the outdoor unit.
10-1-2. Check inter-unit wiring.
Check that inter-unit wiring is correctly connected to
the indoor unit from the outdoor unit.
10-1-3. Check power supply.
Check that voltage is in specified range
(±10% of the rating).
Check that power is being supplied.
10-1-4. 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 con-
nected.
Check that wiring is correct.
Power supply
50Hz,1-phase,240 VAC
Outdoor unit
1
Power
supply
2
3
Ground
4
5
6
Ground
7
8
9
10
Ground
11
12
21
Inter-unit
power wiring
Indoor Unit A
1
2
3
Ground
4
Indoor Unit B
1
2
3
Ground
4
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