Panasonic WH-ADF0309J3E5CM Service Manual page 289

25.2.42 Outdoor Current Transformer Open Circuit (H16 / H03 / F46)
Malfunction Decision Conditions

An input current, detected by Current Transformer CT, is below threshold value when the compressor is
operating at certain frequency value for 3 minutes.
Malfunction Caused

Lack of gas

Broken CT (current transformer)

Broken Outdoor PCB
Troubleshooting
Suction pressure and running current is
normal
● Check & replace defected CT
When abnormality indication starts again
Refer to Service Manual Technical Graph
for Temp vs Current and Pressure
In forced cooling, check suction ressure
versus running current
Running current and suction pressure is
very low
● Check for gas leaking source; Repair
or replace defected part(s)
● Capillary tube/expansion valve
blockage; Replace defected part(s)
289
For safety reason and to
prevent component
Caution
breakdown, always switch off
the power before remove and
connect the component.
Running current is much too low and
suction pressure is much too high
● Compressor Lack Compression
● Replace Compressor