Panasonic CS-S18NKUA Service Manual

Also see for CS-S24NKUA: Manual Operating instructions

Panasonic CS-S18NKUA Service Manual Manual pdf 34 page image

3412.10 Cooling Overload Control• Pipe temperature limitation / restriction.o Detects the outdoor pipe temperature and carry out restriction / limitation below (Limit the compressoroperation frequency)o 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 riseprotection)12.11 Freeze Prevention Control• When indoor heat exchanger temperature is lower than 32°F continuously for 6 minutes, compressor will stopsoperation.• Compressor will resume its operation 3 minutes after the indoor heat exchanger is higher than 55.4°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 itsnormal operation.12.12 Freeze Prevention Control 2• Control start conditionso During Cooling operation and soft dry operation During thermo OFF condition, indoor intake temperature is less than 50°F or Compressor stops for freeze prevention controlo Either one of the conditions above occurs 5 times in 60 minutes.• Control contentso Operation stopso Timer LED blinks and “H99” indicated12.13 Dew Prevention Control• To prevent dew formation at indoor unit discharge area.• This control will be activated if:o Cooling mode or Quiet mode is activated.o Remote control setting temperature is less than 77°F.o Fan Speed is at CLo or QLo.o Room temperature is constant (±33.8°F) for 30 minutes.o Compressor is continuously running.• Fan speed will be adjusted accordingly in this control.o Fan speed will be increased slowly if the unit is in quiet mode but no change in normal cooling mode.