10. TROUBLESHOOTING
10-1. Check before and after
troubleshooting
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.
31
WARNING
Hazardous voltage can cause ELECTRIC
SHOCK or DEATH. Disconnect power or turn
off circuit breaker before you start checking
or servicing.
Ground
Ground
Ground
Outdoor unit
Ground
Indoor Unit A
Indoor Unit B
4
5
6
7
8
9
10
11
12
1
2
3
4
1
2
3
4
1
2
3
Ground
Inter-unit
power wiring
Power supply
CMxx21GA.....50Hz,1-phase,220–240 VAC
CMxx21JA......60Hz,1-phase,220 VAC
Power
supply
