TECHNICAL & SERVICE MANUAL Ceiling Cassettes ... - Engvent.ru

8-2. SELF-DIAGNOSIS ACTION TABLEError Code Meaning of error code and detection method Case Judgment and actionP1Abnormality of room temperature thermistor(TH1)1 The unit is in three-minute resume preventionmode if short/open of thermistoris detected. Abnormal if the unit doesnot reset normally after three minutes.(The unit returns to normal operation, ifit has normally reset.)2 Constantly detected during cooling, drying,and heating operation.Short: 90: or moreOpen: -40: or less1 Defective thermistor characteristics2 Contact failure of connector(Insert failure)3 Breaking of wire or contact failureof thermistor wiring4 Defective indoor control p.c.board1–3 Check resistance value of thermistor.0: ······15.0k"10: ····9.6k"20: ····6.3k"30: ····4.3k"40: ····3.0k"If you put force on (draw or bend) the lead wirewith measuring resistance value of thermistorbreaking of wire or contact failure can bedetected.2 Check contact failure of connector.Put the power on again and check restartafter inserting connector again.4 Check room temperature display on remotecontrollerReplace indoor control p.c. board if there isabnormal difference with actual room temperature.There is no abnormality if none of abovecomes within the unit.Put the power off, and on again to operate.P2P4P5Abnormality of pipe temperature thermistor/Liquid(TH2)1 The unit is in three-minute resume preventionmode if short/open of thermistoris detected. Abnormal if the unit doesnot reset normally after three minutes.(The unit returns to normal operation, ifit has normally reset.)2 Constantly detected during cooling, drying,and heating (except defrosting)operation.Short: 90: or moreOpen: -40: or lessAbnormality of drain sensor (DS)1 Suspensive abnormality, if short/open ofthermistor is detected for 30 secondscontinuously.Put off compressor and indoor fan.2 Short/open is detected for 30 secondscontinuously during suspensive abnormality.(The unit returns to normal operation, ifit has normally reset.)3 Detect the following condition.• During cooling and drying operation.• In case that pipe temperatureroomtemperature