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5.
6. TROUBLESHOOTING
5-1.
6-1. 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.
5-1-1.
6-1-1. Check power supply wiring.
G Check that power supply wires are correctly connected to terminals L and N on the terminal plate in the indoor
unit.
5-1-2.
6-1-2. Check inter-unit wiring.
G Check that inter-unit wiring is correctly connected to the outdoor unit from the indoor unit.
5-1-3.
6-1-3. Check power supply.
G Check that voltage is in specified range (±10% of the rating).
G Check that power is being supplied.
5-1-4.
6-1-4. Check lead wires and connectors in indoor and outdoor units.
G Check that coating of lead wires is not damaged.
G Check that lead wires and connectors are firmly connected.
G Check that wiring is correct.
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.)
G There is a possibility of ground fault.
G Check insulation resistance.
If resistance value is 2MΩ or less, insulation is defective ("NO").
WARNING
*
Set circuit breaker to OFF.
Remove inter-unit wires from
1
terminal plate in outdoor unit.
•
Measure insulation resistance
of outdoor unit.
Remove inter-unit wires from
2
terminal plate in indoor unit.
Then, pull the power plug out of
the wall outlet
•
Measure insulation resistance
of indoor unit.
Insulation of
NO
outdoor unit
is defective.
Measure insulation
•
resistance of electrical
parts in outdoor unit.
Insulation of
NO
indoor unit
is defective.
Measure insulation
•
15
resistance of electrical
parts in indoor unit.
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