Protection Control For Cooling And Soft Dry Operation - Panasonic CS-RE9NKE Service Manual

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.
Outdoor air temp.( ℃)
RE9NKE
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.
• This control starts if all conditions continue for 20 minutes:
- Operated with Cooling or Soft Dry Mode.
- Outdoor air temperature is less than 34℃.
• This control stopped if anyone of the following conditions is achieved:
- Outdoor air temperature is over 34℃.
- Intake air temperature is less than 24℃.
- Operation without Cooling or Soft Dry Mode.
Outdoor air temp.( ℃)
RE12NKE
39
Outdoor air temp.( ℃)
RE15NKE