Panasonic S-45PU1E5 Technical Data & Service Manual page 306

H03 Primary current CT sensor (current sensor) failure
1. Error Detection Method
It is judged an error based on the criteria listed below.
• If 18A or greater is detected when the compressor is stopped (alarm triggered even if the connector is unplugged).
• If no current is detected even though a compressor is running.
2. Error Diagnosis
1 Check the
1-1
control
PC board
5
Turn the power on again and run the outdoor unit.
Is alarm occurred after operation?
5-34
Yes Replace CR board.
No See what happens.