Panasonic CS-NZ9SKE Service Manual

Also see for CS-NZ12SKE: Operating instructions

Contents

Panasonic CS-NZ9SKE Service Manual Manual pdf 76 page image

7615.2 Protection Control for Cooling & Soft Dry Operation15.2.1 Outdoor Air Temperature Control The compressor operating frequency is regulated in accordance to the outdoor air temperature as shown in thediagram below. This control will begin 1 minute after the compressor starts. Compressor frequency will adjust base on outdoor air temperature.15.2.2 Cooling Overload Control Detects the Outdoor pipe temperature and carry out below restriction/limitation (Limit the compressor Operationfrequency). The compressor stop if outdoor pipe temperature exceeds 60°C. If the compressor stops 4 times in 20 minutes, Timer LED blinking (F95 indicated: outdoor high pressure riseprotection).15.2.3 Freeze Prevention Control 1 When indoor heat exchanger temperature is lower than 0°C continuously for 6 minutes, compressor will stopoperating. Compressor will resume its operation 3 minutes after the indoor heat exchanger is higher than 5°C. At the same time, indoor fan speed will be higher than during its normal operation. If indoor heat exchanger temperature is higher than 5°C for 5 minutes, the fan speed will return to its normaloperation.15.2.4 Freeze Prevention Control 2 Control start conditionso During Cooling operation and soft dry operation During thermo OFF condition, indoor intake temperature is less than 10°C 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” indicated15.2.5 Dew Prevention Control 1 To prevent dew formation at indoor unit discharge area. This control will be activated if:o 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. This control stopped if:o Compressor stopped.o Remote control setting changed (fan speed / temperature).o Outdoor air temperature and indoor intake temperature changed. Fan speed will be adjusted accordingly in this control.