Panasonic CS-E18SD3UAW service manual - Page 94

F98 Input Over Current Detection

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15.5.23 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. Caution For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Input current > limit? NO YES Turn off power supply. Check the main circuit electrolytic capacitor. Replace the outdoor unit PCB. Normal? NO Check refrigerant amount. NO Excess refrigerant? NO YES YES 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 94

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94
15.5.23 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.
NO
Replace the outdoor unit PCB.
Turn off power supply. Check the main
circuit electrolytic capacitor.
Input current > limit?
Normal?
Check refrigerant amount.
Excess refrigerant?
Reclaim and recharge with correct
amount of refrigerant.
YES
YES
YES
NO
NO
NO
Repair the pipe flare or union nuts.
Reclaim and recharge refrigerant.
Replace outdoor unit PCB
Replace outdoor unit compressor
For safety reason and to prevent component
breakdown, always switch off the power
before remove and connect the component.
Caution