Panasonic CS-E12RB4UW Service Manual page 65

15.4.5 H16 (Outdoor Current Transformer)
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 pressure
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).
65
For safety reason and to
prevent component
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.