Part 4 Trouble Shooting
- 69 -
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Display
code
Title Cause of error Check point & Normal condition
26
Over-current at the initial
operation of the compres-
sor / location sensing sig-
nal for compressor opera-
tion is not input
• Compressor Locking
• Overload operation
(Outdoor fan constraint,
screened, blocked)
• Burned parts inside
PCB(IPM)
• Burned PCB phase current
sensing circuit parts
• Check compressor locking
• Compressor wire open/short
• Check compressor insulation damage
• Check outdoor fan constraint / screened / flow
structure
• Check if IMP burned (refer to CH21)
• Check on-PCB current sensing circuit parts
WARNING
Before checking PCB or each outdoor electric parts, wait for 3 minutes after the power is off. When measuring at standby state
of power supply, after checking the measurement mode of the meter, be careful of the short-circuits with other parts.
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