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17.4.9 H25 (nanoe-G Air Purifying System Abnormal)
Malfunction Decision Conditions
During standby of cooling and heating operation, nanoe-G breakdown occurs and air conditioner stops operation.
Malfunction Caused
Faulty indoor main PCB.
Faulty indoor nanoe-G power module.
Troubleshooting
When abnormality indication starts again
Turn off the power, and reconnect CN-CLN connector
Turn on the power, and measure again the DC voltage
between CN-CLN channel 4 & 2
Is the voltage measured at 5Vdc?
Defect in indoor unit nanoe-G power module
Replace the indoor unit nanoe-G power module
Defect in indoor unit main PCB
Replace the indoor unit main PCB
Check the indoor unit main PCB CN-CLN terminal 4 & 2 DC
voltage:
Turn off the power
Disconnect the CN-CLN connector
Turn on the power, measure the DC voltage between
CN-CLN terminal 4 & 2
Is the DC voltage measured at 5Vdc?
NO
Defect in indoor main PCB
Replace the indoor unit main PCB
YES
NO
YES
For safety reason and to prevent component
breakdown, always switch off the power
before remove and connect the component.
nanoe-G power
module
WIRE HOLDER
GENERATOR
COMPLETE
ELECTRONIC
CONTROLLER
44
11
W
GG
BL
HV(-)
W
W
W
W
HV(+)
GND
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