Protection Control For Heating Operation - Panasonic CS-NE9LKE Service Manual

13.2.6. Dew Prevention Control 2
• 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.
- Indoor intake temperature is between 25°C and 29°C.
- Outdoor air temperature is less than 30°C.
- Quiet Lo fan speed.
• This control stopped if:
- When receive air swing change signal from Remote Control.
• The horizontal louver will be fixed at 26° (regardless of Auto or Manual Airflow Direction Setting).

13.3. Protection Control For Heating Operation

13.3.1. Intake Air Temperature Control
Compressor will operate at limited freq., if indoor intake air temperature is 30°C or above.
13.3.2. Outdoor Air Temperature Control
• The Max current value is regulated when the outdoor air temperature rise above 14°C in order to avoid compressor overloading.
13.3.3. Overload Protection Control
• The compressor operating frequency is regulated in accordance to indoor heat exchanger temperature as shown below.
• If the heat exchanger temperature exceeds 60°C, compressor will stop.
13.3.4. Low Temperature Compressor Oil Return Control
• In heating operation, if the outdoor temperature falls below -10°C when compressor starts, the compressor frequency will be
regulated up to 600 seconds.
13.3.5. Cold Draught Prevention Control
• When indoor pipe temperature is low, cold draught operation starts where indoor fan speed will be reduced.
13.3.6. Deice Operation
• When outdoor pipe temperature and outdoor air temperature is low, deice operation start where indoor fan motor and outdoor fan
motor stop and operation LED blinks.
46