F98 (Input Over Current Detection) - Panasonic CS-XE9WKUAW Service Manual

16.4.27 F98 (Input Over Current Detection)

Malfunction Decision Conditions

During operation of cooling and heating, when an input over-current (X value in Total Running Current Control) is
detected by checking the input current value being detected by current transformer (CT) with the compressor
running.
Malfunction Caused

Excessive refrigerant.

Faulty outdoor unit PCB.
Troubleshooting
When F98 indication happens.
Get restarted and measure the input
current.
Input current > limit?
Turn off power supply. Check the main
circuit electrolytic capacitor.
Normal?
Check refrigerant amount.
Excess refrigerant?
NO
YES
YES
NO
NO
YES
NO
For safety reason and to prevent component
breakdown, always switch off the power
Caution
before remove and connect the component.
Replace the outdoor unit PCB.
Repair the pipe flare or union nuts.
Reclaim and recharge refrigerant.
Reclaim and recharge with correct
amount of refrigerant.
Replace outdoor unit PCB.
Replace outdoor unit compressor.
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