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.

If compressor discharge temperature exceeds 112°C, compressor will be stopped, occurs 4 times per 20 minutes, timer LED will be blinking. (“F97” is indicated.)

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 0.6A and 1.15A.

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:

-Stop operation

-Timer LED blinks and “F91” indicated.

13.1.7. Low Frequency Protection Control 1

When the compressor operate at frequency lower than 25 Hz continued for 240 minutes, the operation frequency will be changed to 24 Hz for 2 minutes.

13.1.8. 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

 

 

 

 

 

 

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Panasonic CS-CE9JKE Compressor Overheating Prevention Control, Low Pressure Prevention Control Gas Leakage Detection