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Communication Error
52
(Inverter PCB ↔ Main
PCB)
WARNING
Before checking PCB(Inverter) 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.
• Resetting power source: Wait for 3 minutes after turning the power of the porduct off.
Items for checking
Resetting
power source
Connector
Check the Heat sink
and Chassis Panel
Replacement of
inverter PCB
Replacement of
main PCB
Cause of error
Checking the communica-
tion state between Main
PCB and Inverter PCB
Sub-items for checking
Insufficient insertion
of housing
Checking
power source
※ It should not be short
LED Off
※ Refer to 3.15.1
- 100 -
Check point & Normal condition
• Generation of noise source interfering with com-
munication
Damage of
wire coating
Damage of
wire coating
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Troubleshooting
