Panasonic CS-S9TKV Service Manual page 101

15.4.5 H16 (Outdoor Current Transformer Open Circuit)
Malfunction Decision Conditions

A current transformer (CT) is detected by checking the compressor running frequency (≥ rated frequency) and
CT detected input current (less than 1.14 A) for continuously 20 seconds.
Malfunction Caused

CT defective.

Outdoor PCB defective.

Compressor defective (low compression).
Troubleshooting
When abnormality indication starts again.
Check the functionality of current transformer (CT).
Is the CT open circuit?
Force heating operation and measure:
Running current.
Suction pressure.
Is the running current less than 0.65 A and suction pressure
120 psi?
NO
NO
For safety reason and to prevent
component breakdown, always switch
Caution
off the power before remove and
connect the component.
YES
Replace the outddoor PCB.
YES
Replace Compressor due to compressor low
compression.
Check for gas leaking source; Repair or replace
defected part(s).
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