Panasonic CS-RE9SKUA Service Manual page 64


The compressor will be stopped at outdoor air temperature ≤ -4°F. The unit still operate within the temperature
range.
15.2.2 Cooling Overload Control

Pipe temperature limitation / restriction.
Detects the outdoor pipe temperature and carry out restriction / limitation below (Limit the compressor
o
operation frequency)
The compressor stops if outdoor pipe temperature exceeds 145.4°F.
o
If the compressor stops 4 times in 20 minutes, Timer LED blinks ("F95" indicated: Outdoor high pressure rise
o
protection)
15.2.3 Freeze Prevention Control 1

When indoor heat exchanger temperature is lower than 32°F continuously for 6 minutes, compressor will stops
operation.

Compressor will resume its operation 3 minutes after the indoor heat exchanger is higher than 41.0°F.

At the same time, indoor fan speed will be higher than during its normal operation.

If the indoor heat exchanger temperature is higher than 55.4°F for 5 minutes, the fan speed will return to its
normal operation.
15.2.4 Freeze Prevention Control 2

Control start conditions
During Cooling operation and soft dry operation
o
 During thermo OFF condition, indoor intake temperature is less than 50.0°F or
 Compressor stops for freeze prevention control
Either one of the conditions above occurs 5 times in 60 minutes.
o

Control contents
Operation stops
o
Timer LED blinks and "H99" indicated
o
15.2.5 Dew Prevention Control 1

To prevent dew formation at indoor unit discharge area.

This control will be activated if:
Outdoor air temperature and Indoor pipe temperature judgment by microcontroller is fulfilled.
o
When Cooling or Dry mode is operated more than 20 minutes or more.
o

This control stopped if:
Compressor stopped.
o
Remote control setting changed (fan speed / temperature).
o
Outdoor air temperature and indoor intake temperature changed.
o

Fan speed, angle of louver (vertical airflow angle) will be adjusted accordingly in this control.
1. Fan speed will be increased slowly when control is activated until predetermine value.

Compressor frequency will be regulated accordingly.
Compressor ON
-0.4°F
Compressor OFF
Outdoor Air Temperature
64
-4°F