Troubleshooting; Check Before And After Troubleshooting; Troubleshooting 9-1 Check Before And After Troubleshooting - Technibel MCAV180C5VAA Technical Data & Service Manual

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 L and N on the terminal plate in the
outdoor unit.
THREEPHASE MODELS
Check that power supply wires are correctly connected
to terminals L1, L2 , L3 and N on the 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.
Power supply:
380 V – 400 V
3N ~ 50 Hz
THREEPHASE MODELS
L1
380V – (400V)
L2
380V – (400V)
L3
N
39
Outdoor
unit
1
2
Ground
4
L1
L1
Inter-unit
L2
L2
wiring
L3
L3
N
N
Ground
380V – (400V)
220V – (230V)
Indoor
unit
1
2
4