Panasonic CU-5E36QBU-5, Service Manual

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15.2.22 F98 (Total Running Current Protection)
Malfunction Decision Conditions

During operation of cooling and heating, when an input over-current (20.0A) is detected by checking the input
current value being detected by current transformer (CT) with the compressor running.
Malfunction Caused

Over-current due to compressor failure.

Over-current due to defective outdoor unit PCB.

Over-current due to defective inverter main circuit electrolytic capacitor.

Over-current due to excessive refrigerant.
Abnormality Judgment:

3 times happen within 20 minutes.
Troubleshooting
For safety reason and to prevent component
breakdown, always switch off the power before
remove and connect the component.
Input current > 16.8A?
Yes
Get restarted and
measure the input
current.
No
Yes
Replace the outdoor unit
PCB.
No
Turn off power supply.
Check the main circuit
electrolytic capacitor.
Normal?
Replace the outdoor unit
PCB.
Check refrigerant amount.
Excess refrigerant?
Reclaim and recharge with
correct amount of refrigerant.
Replace outdoor unit PCB.
No
Yes
Keep the tester in the
resistance measuring range.
When the pointer swings,
it means the capacitor
functions. If the pointer does not swing at all,
or if it swings all the way but does
not return, it means the capacitor
malfunction.
(O0367)
Caution