Cooling Overload Control; Freeze Prevention Control - Panasonic CS-E18HKEW Service Manual

13.2.2. Cooling Overload Control

i. Pipe temperature limitation/restriction
• Detects the Outdoor pipe temperature and carry out below restriction/limitation (Limit the compressor Operation frequency)
• The compressor stop if outdoor pipe temperature exceeds 63 C.
• If the compressor stops 4 times in 20 minutes, Timer LED blinking (F95: outdoor high pressure rise protection)
13.2.3. Dew Prevention Control 1
1. To prevent dew formation at indoor unit discharge area.
2. This control activated if:
• Outdoor air temperature and Indoor pipe temperature judgment by microcontroller if fulfilled.
• When Cooling or Dry mode is operated more than 20 minutes or more.
3. This control stopped if:
• Compressor stopped.
• Remote control setting changed. (fan speed / temperature)
• Outdoor air temperature and indoor intake temperature changed.
4. Fan speed, angle of louver (vertical airflow angle) will be adjusted accordingly in this control.
• Fan speed will be increased slowly if the unit is in quiet mode but no change in normal cooling mode.
• The angle of horizontal louver will be changed as table below:
Operation Mode
Cooling and e-ion
13.2.4. Dew Prevention Control 2
1. To prevent dew formation at indoor unit discharge area.
2. 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.
3. This control stopped if:
• When receive air swing change signal from Remote Control.
4. The horizontal louver will be fixed at 24 (regardless of Auto or Manual Airflow Direction Setting)

13.2.5. Freeze Prevention Control

1. When indoor heat exchanger temperature is lower than 0 C continuously for six minutes, compressor will stop operating.
2. Compressor will resume its operation three minutes after the indoor heat exchanger is higher than 13 C.
3. At the same time, indoor fan speed will be higher than during its normal operation.
4. If indoor heat exchanger temperature is higher than 13 C for five minutes, the fan speed will return to its normal operation.
Airflow Direction
Auto
Manual
49
Vane Angle ( )
1 2 3 4
22 ~ 30
22 24 26 28
5
30