Troubleshooting; Check Before And After Troubleshooting - Technibel MCAV127C5VAB Technical Data & Service Manual

7. TROUBLESHOOTING

7-1. 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.
7-1-1. 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.
7-1-2. Check inter-unit wiring.
Check that inter-unit wiring is correctly connected to the indoor unit from the outdoor unit.
Power supply :
220–240V ~ 50Hz
7-1-3. Check power supply.
Check that voltage is in specified range (±10% of the rating).
Check that power is being supplied.
7-1-4. Check lead wires and connectors.
Check that coating of lead wires is not damaged.
Check that lead wires and connectors are firmly connected.
Check that wiring is correct.
Outdoor Unit
Power
1
supply
2
Ground
1
2
3
Ground
4
1
2
3
Ground
4
ndoor Unit A
I
Inter-unit
L
wiring
N
1
2
4
ndoor Unit B
I
L
N
1
2
4
18