CS-YE9MKX, CS-YE12MKX, CS-YE18MKX, CU-YE9MKX, CU-YE12MKX, CU-YE18MKX - Panasonic Air Conditioner Service Manual (repair manual). Page 35

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35 
Indoor suction temperature - indoor piping temperature is below 4℃. 
Indoor temperature and outdoor temperature is 30±5℃. 
Remote Control setting 16℃ and Hi Fan Speed. 
• During Heating operations: 
Indoor piping temperature - indoor suction is under 5℃. 
Indoor temperature and outdoor temperature is 20 ± 2℃. 
Remote control setting 30℃ 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 
13.2  Protection Control For Cooling and Soft Dry Operation 
13.2.1  Outdoor Air Temperature Control 
• The compressor operating frequency is regulated in accordance to the outdoor air temperature as shown in the 
diagram below. 
• This control will begin 1 minute after the compressor starts. 
• Compressor frequency will adjust base on outdoor air temperature. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
                      YE9MKX, YE12MKX                                                                          YE18MKX 
13.2.2  Freeze Prevention Control 
1 .Frequency of the compressor 
For prevention of freezing of the indoor evaporator, the frequency of the compressor will be changed according to 
the indoor piping temperature. 
 
 
 
 
 
 
 
 
 
2 .Indoor Fan Control 
Indoor fan speed changes according to the indoor piping temperature. 
 
 
 
 
 
 
 
 
13.2.3  Dew Prevention Control 
• To prevent dew formation at indoor unit discharge area. 
Outdoor air temp.( ℃.) 
38 
25 
18 
11 
free 
Free    
38    
26  
16  
37
22
15
8
Outdoor air temp.( ℃.)
38
25
18
11
free 
16    
26    
37   
47   
37
22
15
8
9℃. 
8℃. 
6℃. 
0℃. 
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