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15.1.4 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 103
°
C, compressor will be stopped, occurs 4 times per 20 minutes, timer LED
will be blinking. (“F97” is indicated.)
103°C
88°C
Comp. Discharge temperature
Compressor = OFF
99°C
87°C
Compressor Frequency
Reduce
96°C
86°C
Compressor Frequency
Maintain
Free
15.1.5 Low Pressure Prevention Control (Gas Leakage Detection)
a. Control start conditions
For 5 minutes, the compressor continuously operates and outdoor total current is between 0.75A and 0.95A.
During Cooling and Soft Dry operations:
Indoor suction temperature - indoor piping temperature is below 4°C.
During Heating operations :
Indoor piping temperature - indoor suction is under 5°C.
b. Control contents
Compressor stops (and restart after 3 minutes).
If the conditions above happen 2 times within 20 minutes, the unit will:
o
Stop operation
o
Timer LED blinks and “F91” indicated.
15.1.6 Low Frequency Protection Control 1
When the compressor operate at frequency lower than 24 Hz continued for 240 minutes, the operation frequency
will be changed to 23 Hz for 2 minutes.
15.1.7 Low Frequency Protection Control 2
When all the below conditions comply, the compressor frequency will change to lower frequency.
Temperature, T, for:
Cooling / Soft Dry
Heating
Indoor intake air (°C)
T < 14 or T ≥ 30
T < 14 or T ≥ 28
Outdoor air (°C)
T < 13 or T ≥ 38
T < 4 or T ≥ 24
Indoor heat exchanger (°C)
T < 30
T < 0
Summary of Contents for CS-HZ9RKE-1
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