Technical data

6. TROUBLESHOOTING
6-1. Check before and after troubleshooting
6-1-1. 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.
6-1-2. Check inter-unit wiring.
●
Check that inter-unit wiring is correctly connected to the outdoor unit from the indoor unit.
6-1-3. Check power supply.
●
Check that voltage is in specified range (±10% of the rating).
●
Check that power is being supplied.
6-1-4. 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.
WARNING
Hazardous voltage can cause ELECTRIC SHOCK or
DEATH. Disconnect power or turn off circuit breaker
before you start checking or servicing.
5.
5-1.
5-1-1.
5-1-2.
5-1-3.
5-1-4.
5-2. Air conditioner does not operate.
5-2-1. Circuit breaker trips (or fuse blows).
A. When the circuit breaker is set to ON, it trips immediately. (Resetting is not possible.)
●
There is a possibility of ground fault.
●
Check insulation resistance.
If resistance value is 2MΩ or less, insulation is defective (“NO”).
NO
Measure insulation
resistance of electrica
l
parts in outdoor unit.
NO
Set circuit breaker to OFF.
*
Measure insulation
resistance of electrica
l
parts in indoor unit.
1
Remove inter-unit wires from
terminal plate in outdoor unit.
Measure insulation resistance
of outdoor unit.
•
2
Remove inter-unit wires from
terminal plate in indoor unit.
Then, pull the power plug out of
the wall outlet
Measure insulation resistance
of indoor unit.
•
•
•
Insulation of
outdoor unit
is defective.
Insulation of
indoor unit
is defective.
WARNING
20