Panasonic CS-PS9JKT Service Manual page 51

14.4.8 H25 (e-ion Air Purifying System Abnormal)
Malfunction Decision Conditions
•
During standby of cooling and heating operation, e-ion breakdown occurs and air conditioner stops operation.
Malfunction Caused
•
Faulty indoor main PCB.
•
Faulty indoor e-ion power module.
Troubleshooting
When abnormality indication starts again
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?
•
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?
NO
NO
51
For safety reason and to prevent component
breakdown, always switch off the power
before remove and connect the component.
YES
•
Defect in indoor main PCB
•
Replace the indoor unit main PCB
YES
•
Defect in indoor unit e-ion power module
•
Replace the indoor unit e-ion power module
•
Defect in indoor unit main PCB
•
Replace the indoor unit main PCB
E-ion power
module