Panasonic CU-E18RKUA

62
15.1.5 Compressor Overheating Prevention Control
 Instructed frequency for compressor operation will be regulated by compressor discharge temperature. The
changes of frequency are as below.
 If compressor discharge temperature exceeds 224.6°F, compressor will be stopped, occurs 4 times per
20 minutes, timer LED will be blinking. (“F97” is indicated.)
15.1.6 Low Pressure Prevention Control (Gas Leakage Detection)
 Control start conditions
o For 5 minutes, the compressor continuously operates and outdoor total current is between 0.64A and 0.85A.
o During Cooling and Soft Dry operations:
Indoor suction temperature - indoor piping temperature is below 7.2.°F.
o During Heating operations:
Indoor piping temperature - indoor suction is under 9°F.
 Control contents
o Compressor stops (and restart after 3 minutes).
o If the conditions above happen 2 times within 20 minutes, the unit will:
 Stop operation
 Timer LED blinks and “F91” indicated.
15.1.7 Low Frequency Protection Control 1
 When the compressor operates at frequency lower than 24Hz continued for 240 minutes, the operation frequency
will be changed to 25Hz for 2 minutes.
15.1.8 Low Frequency Protection Control 2
 When all below conditions comply, minimum limit of compressor will be set.
Temperature, T, for: Cooling / Soft Dry Heating
Indoor intake air (°F) T < 57.2 or T ≥ 86 -
Outdoor air (°F) T < 55.4 or T ≥ 100.4 T < 57.2 or T ≥ 82.4
Indoor heat exchanger (°F) T < 86 T ≥ 32
Compressor = OFF
Compressor Frequency
Reduce
Compressor Frequency
Maintain
Free
224.6
o
F
217.4
o
F
212
o
F
197.6
o
F
195.8
o
F
194
o
F
C
omp. Discharge temperature