Panasonic WH-SDC09H3E8 Service Manual page 190

16.5.30 Input Over Current Detection (F16)
Malfunction Decision Conditions:
During operation of cooling and heating, when outdoor current above 11.8 A (UD09HE8, UD12HE8) and 16.5 A
UD16HE8) is detected by the current transformer (CT) in the outdoor unit PCB.
Malfunction Caused:
1 Excessive refrigerant.
2 Faulty outdoor unit PCB (main).
Abnormality Judgment:
Continue 3 times in 20 minutes.
Troubleshooting:
Caution
Get restarted and measure
the AC current from the
outdoor LIVE terminal.
Is the measured AC current
over 11.8 A (UX09HE8,
UX12HE8) and 16.5 A
(UX16HE8)?
Yes
Check refrigerant amount.
Excess refrigerant?
No
For safety reason and to prevent component breakdown,
always switch off the power before remove and connect the component.
No
Replace the outdoor unit
PCB (main).
Yes
Reclaim and recharge with
correct amount of refrigerant.
Replace the outdoor unit
PCB (main).
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