Panasonic WH-SHF09D3E8 Service Manual

Also see for WH-SHF09D3E8: Design handbook Operating instructions Service manual

Contents

Panasonic WH-SHF09D3E8 Service Manual Manual pdf 62 page image

6213.1.6 Low Pressure Protection Control Purpose:o To protect the system operation. Detection period:o After compressor on for 5 minutes. Detection conditions:o When detection of Tem above 30°C.o Calculation of average evaporation temperature (Tem).o Use outdoor low pressure sensor.o Tem use the value calculated for discharge temperature setting value After detection:o Compressor stops restart again after 3 mins.o When abnormalities continuously generated 60 times within 480 minuteso Protection is prohibited.o Error H42 will be displayed.13.1.7 High Pressure Sensor Control / Low Pressure Sensor Purpose:o To protect the system operation. Detection period:o After compressor on for 1 minute. Detection conditions:o When abnormal high voltage detection, 5V or when open circuit detection 0V for 5 seconds continuously. After detection:o When abnormality is detected continue 5 seconds, unit stop operation.o OFF/ON control panel LED will blink (H64 error occurs).13.1.8 Outside Temperature Current Control13.1.9 Extreme Low Temperature Control Purpose:- To improve the compressor reliability during cold start and after deice when running in extreme low outdoortemperature -20°C. Starting condition:o Heating operationo Outdoor air temperature < -10°Co Actual frequency ≥ 50Hzo Compressor discharge temperature < 20°C When the above condition is fulfilled, this control is activated.5Hz up every 30 sec. until it reaches the target frequency. Cancellation condition:o starting condition not fulfill.o Cancel the extreme low temperature control when compressor discharge sensor ≥ 60°C