Table of Contents
Advertisement
10-2. Air conditioner does not operate.
10-2-1. Circuit breaker trips (or fuse blows).
A. When the circuit breaker is set to ON, it is tripped soon. (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").
Power
Circuit
supply
breaker
WARNING
*
Set circuit breaker to OFF.
1 Remove both power supply wires
and 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.
Measure insulation resistance
•
of indoor unit.
Outdoor
unit
1
1
2
3
4
Ground
5
6
7
Ground
8
9
10
11
Ground
12
NO
NO
22
Inter-unit wiring
1
2
Insulation of
outdoor unit
is defective.
Measure insulation
•
resistance of electrical
parts in outdoor unit.
Insulation of
indoor unit
is defective.
Measure insulation
•
resistance of electrical
parts in indoor unit.
1
2
Indoor
3
unit A
4
1
2
Indoor
3
unit B
4
Advertisement
Table of Contents
