Service manual

10. TROUBLESHOOTING
10-1. Check before and after
troubleshooting
10-1-1. 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.
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
connected.
●
Check that wiring is correct.
60
WARNING
Hazardous voltage can cause ELECTRIC
SHOCK or DEATH. Disconnect power or turn
off circuit breaker before you start checking
or servicing.
1
Indoor
unit
Outdoor
unit
Inter-unit
wiring
Power supply:
380 V – 400 V
3N ~ 50 Hz
N
2
L1
L2
L3
L1
L2
L3
N
Ground
Ground
1
2
4 4
●
Check that power supply wires are correctly connected
to terminals L1, L2 , L3 and N on the terminal plate in
the outdoor unit.
THREEPHASE MODELS
380V – (400V)
380V – (400V)
380V – (400V)
L1
L2
L3
N
220V – (230V)
THREEPHASE MODELS