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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.

32 Inverter compressor discharge pipe temperature is too high. 3X 2X 40 Current transformer (CT) thermistor has disconnected or has shorted out. 4X — 41 Inverter compressor discharge pipe thermistor has disconnected or has shorted out. 4X 1X 44 Outdoor unit inlet air thermistor has disconnected or has shorted out. 4X 4X

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