Panasonic CS-E18QB4RW Service Manual page 82

15.4.23 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
82