Panasonic Elite Big PAC-i S-200PE3E5B Technical Data & Service Manual page 224

P15 Insufficient Gas Level Detected
1. Abnormal Detection Method
Alarm occurs in the following cases:
• Compressor's current value shows lower than a certain value.
• Compressor's discharge temperature exceeds 95°C.
• Electronic expansion valve is fully opened.
• The difference between indoor unit heat exchanger temperature and intake temperature is less than 4K.
2. Error Diagnosis
1 Adjustment
of
1-1
refrigerant
amount
1-2 Check leakage of refrigeration (leak test)
5
Insufficient gas level
(Check whether or not pressure level is normal.)
5-24
Recharge with
Yes
additional refrigerant.
No 1-2
Replace leaking part
Yes
with a new one.
No See what happens.