Panasonic CU-5E36QBU-5 Service Manual

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

5715.2.5 H27 (Outdoor Air Temperature Sensor Abnormality)Malfunction Decision Conditions During startup and operation of cooling and heating, the temperatures detected by the outdoor intake airtemperature sensor are used to determine sensor errors.Malfunction Caused Faulty connector connection. Faulty sensor. Faulty PCB.Abnormality Judgment: Continue for 5 seconds.TroubleshootingCheck the outdoor intake air temperature sensor:- Plug out connector from the outdoor unit PCB- Measure the resistance of the outdoor intake airtemperature sensor- Defect in outdoor intake airtemperature sensor- Replace the outdoor intake airtemperature sensorYesFor safety reason and to prevent componentbreakdown, always switch off the power beforeremove and connect the component.Is the measured resistance of theoutdoor intake air temperaturesensor matches the valuespecified in its characteristic chart?NoCheck the connector connection:- Turn off the power- Check the connector connection- Connector poor contact- Correct the connectionNoIs the connectorconnection normal?- Defect in outdoor unit PCB- Replace the outdoor unit PCBYesSensor (Thermistor)CharacteristicsOutdoor Air SensorOutdoor Heat ExchangerSensor1212706050403020-10(14)0(32)10(50)20(68)30(86)40(104)50(122)100Resistance (kΩ)Temperature °C (°F)Caution