Panasonic CS-E18JKEW, Service Manual

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13.1.5. Compressor Overheating Prevention Control
Instructed frequency for compressor operation will be regulated by compressor discharge temperature. The changes of frequency
are as below figure.
If compressor discharge temperature exceeds 112
q
C, compressor will be stop, occurs 4 times per 20 minutes, timer LED will be
blinking (“F97” is to be confirmed).
13.1.6. Low Pressure Prevention Control (Gas Leakage Detection)
a. Control start conditions
• For 5 minutes, the compressor continuously operates and outdoor total current is between 0.65A and 1.65A.
• During Cooling and Soft Dry operations:
Indoor suction temperature - indoor piping temperature is below 4
q
C.
• During Heating operations :
Indoor piping temperature - indoor suction is under 5
q
C.
b. Control contents
• Compressor stops (and restart after 3 minutes).
• If the conditions above happen 2 times within 20 minutes, the unit will:
- Stop operation
- Timer LED blinks and “F91” indicated.
13.1.7. Compressor Tank Temperature Rise Protection Control
a. Control start conditions
• For 5 minutes, the compressor continuously operates and outdoor total current is between 0.65A and 1.65A.
• During Cooling and Soft Dry operations:
Indoor suction temperature - indoor piping temperature is below 4
q
C.
Indoor temperature and outdoor temperature is 30±5
q
C.
Remote Control setting 16
q
C and Hi Fan Speed.
• During Heating operations:
Indoor piping temperature - indoor suction is under 5
q
C.
Indoor temperature and outdoor temperature is 20±2
q
C.
Remote control setting 30
q
C and Hi Fan Speed.
b. Control contents
• Compressor stops (and restart after 3 minutes)
• If the conditions above happen 2 times within 20 minutes, the unit will:
- Stop operation
- Timer LED blinks and “F91” indicated
13.1.8. Low Frequency Protection Control 1
• When the compressor operate at frequency lower than 24 Hz continued for 20 minutes, the operation frequency will be changed
to 23 Hz for 2 minutes.