Panasonic S-71WF3E - Protection Control (CU-2 WZ71 YBE5); Freeze Prevention Control (Cool); Dew Prevention Control (Cool); Electronic Parts Temperature Rise Protection 1 (Cool)

213
19. Protection Control (CU-2WZ71YBE5)
19.1 Freeze Prevention control (Cool)
 When received freeze prevention signal from indoor unit, the compressor frequency changes according to indoor
heat exchanger temperature.
 When indoor unit request capability OFF due to freeze condition, immediately the capability supply to targeted
indoor unit stops.
19.2 Dew Prevention control (Cool)
 When received dew prevention signal from indoor unit, which according to indoor intake temperature and indoor
heat exchanger temperature the compressor frequency changes.
19.3 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 11.6A.
 Control content
o Outdoor fan speed is adjusted accordingly.
 Control stop condition
o When outdoor ambient temperature is back to normal region.