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DEFINING COMMON ERROR CODES

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1Defining Commom ERROR CodesStandard Wall-Mounted High-Efficiency Single Zone Systems LS091HSV System (LSN091HSV Indoor Units / LSU091HSV Outdoor Units)LS121HSV System (LSN121HSV Indoor Units / LSU121HSV Outdoor Units) DEFINING COMMON ERROR CODESLSN091HSV and LSN121HSV Indoor UnitsError CodeDescriptionNo. of Times Indoor Unit LEDs BlinkLED1 (Heating LED)LED2 (Cooling LED)1Indoor unit return air thermistor has disconnected or has shorted 2Indoor unit inlet pipe thermistor has disconnected or has shorted 5Communication failure from indoor unit to outdoor 6Indoor unit outlet pipe thermistor has disconnected or has shorted 9Indoor unit EEPROM 10Indoor unit fan has locked up (fan motor operation failure). 1X12Indoor unit middle pipe thermistor has disconnected or has shorted peak ERROR / IPM fault; compressor DC voltage was too high. 2X1X22 Current transformer2 (CT2) ERROR ; AC input current is too DC link voltage is too Voltage to the system is too low or too 5X26Inverter compressor has seized up or is not providing rotation.

45 Outdoor unit condenser coil middle thermistor has disconnected or has shorted out. 4X 5X 46 Outdoor unit suction line thermistor has disconnected or has shorted out. 4X 6X 48 Outdoor unit coil outlet (liquid line) thermistor has disconnected or has shorted out. 4X 8X 53 Communication failure from outdoor unit to indoor unit. 5X 3X

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