Panasonic CU-5E36QBU-5 Service Manual

Also see for CU-5E36QBU-5: Operating instructions

4213. Protection Control13.1 Freeze Prevention control (Cool) When received freeze prevention signal from indoor unit, the compressor frequency changes according to indoorheat exchanger temperature. When indoor unit request capability OFF due to freeze condition, immediately the capability supply to targetedindoor unit stops.13.2 Dew Prevention control (Cool) When received dew prevention signal from indoor unit, which according to indoor intake temperature and indoorheat exchanger temperature the compressor frequency changes.13.3 Electronic Parts Temperature Rise Protection 1 (Cool) This control prevents electronic parts temperature rise during cooling overload condition. Start conditions:o Outdoor ambient temperature is at protection region as shown in figure below:o Outdoor unit total current is above 5.0A. Control contento Outdoor fan speed is adjusted accordingly. Control stop conditiono When outdoor ambient temperature is back to normal region. During this control, outdoor fan speed does not reduce for Quiet operation.13.4 Electronic Parts Temperature Rise Protection 2 (Cool) This control prevents electronic parts temperature rise during cooling/dry operation. Start conditions:o Total current is at protection region as shown in figure below: Control contento Outdoor fan speed is adjusted accordingly. Control stop conditionso When total current is back to normal region. During this control, outdoor fan speed does not reduce for Quiet operation.