Troubleshooting; Check Before And After Troubleshooting; Troubleshooting 8-1. Check Before And After Troubleshooting - Technibel MCAV77R5VAA Technical & Service Manual

8. TROUBLESHOOTING

8-1. 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.
8-1-1. Check power supply wiring.
Check that power supply wires are correctly connected to terminals L and N on the terminal plate in the indoor
unit.
Power supply :
Single phase
220 –240V ~ 50Hz
8-1-2. Check inter-unit wiring.
Check that inter-unit wiring is correctly connected to the outdoor unit from the indoor unit.
8-1-3. Check power supply.
Check that voltage is in specified range (±10% of the rating).
Check that power is being supplied.
8-1-4. 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.
Indoor
Power plug
(Local supply)
unit
L
N
Ground
1
Ground
2
3
4
Outdoor
Inter– unit
power wiring
unit
L
N
1
2
3
4
Inter–unit
control wiring
42