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15.4.27 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
Turn off power supply. Check the main
circuit electrolytic capacitor
When F98 indication happens
For safety reason and to prevent component
breakdown, always switch off the power
before remove and connect the component.
Get restarted and measure the input
current
NO
Input current > limit?
Replace the outdoor unit PCB
NO
YES
Normal?
Check refrigerant amount
Repair the pipe flare or union nuts
Reclaim and recharge refrigerant
Reclaim and recharge with correct
amount of refrigerant
Excess refrigerant?
YES
NO
YES
NO
Replace outdoor unit PCB
Replace outdoor unit compressor
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