Panasonic CU-E18CKR Service Manual page 37

B. DC Peak Current Control
1. When electric current to IPM exceeds set value of 25.0 ± 4.0 A, the
compressor will stop operate. Then, operation will restart after
three minutes.
2. If the set value is exceeded again more than 30 seconds after the
compressor starts, the operation will restart after two minute.
3. If the set value is exceeded again within 30 seconds after the
compressor starts, the operation will restart after one minute. If
this condition repeats continuously for seven times, all indoor
and outdoor relays will be cut off.
8.2.1.5. Compressor Overheating Prevention Control
Instructed frequency for compressor operation will be regulated by compressor top
temperature. The changes of frequency are as below figure.
8.2.1.6. Low Pressure Prevention Control (Gas Leakage Detection)