Panasonic CU-4E23JBE Service Manual

Also see for CU-3E18JBE: Operating instructions Operating instructions Operating instructions Operating instructions Operating instructions

Panasonic CU-4E23JBE Service Manual Manual pdf 36 page image

3613 Protection Control13.1. Freeze Prevention control (Cool)• When received freeze prevention signal from indoor unit, the compressor frequency changes according to indoor heatexchanger temperature.• When indoor unit request capability OFF due to freeze condition , immediately the capability supply to targeted indoor unit stops.13.2. Dew Prevention control (Cool)• When received dew prevention signal from indoor unit, the compressor frequency changes according to indoor intaketemperature and indoor heat exchanger temperature.13.3. Electronic Parts Temperature Rise Protection 1 (Cool)• This control prevents electronic parts temperature rise during cooling overload condition.• Start conditions:- Outdoor ambient temperature is at protection region as shown in figure below:- Outdoor unit total current is above 5.5A• Control content- Outdoor fan speed is adjusted accordingly.• Control stop condition- 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:- Total current is at protection region as shown in figure below:• Control content- Outdoor fan speed is adjusted accordingly.• Control stop conditions- When total current is back to normal region.• During this control, outdoor fan speed does not reduce for Quiet operation.