LG Error Code Search
Error code search offers information on the cause of the malfunction and the status of your air conditioner by entering the error code.
Disclaimer:
- This page provides a simple explanation concerning content relating to error codes and their possible causes. Please note that the content may slightly differ depending on the model.
2. It is always advised that you consult with an HVAC repair professional before attempting to provide any repairs yourself.
3. Precision Air assumes no responsibility for any accidents or troubles caused in the disassembly or repair of equipment performed according to the information on this page.
Caution:
If molded case circuit breakers or earth leakage circuit breakers have tripped, do not reset the breaker immediately without first checking for any problems with the insulation of equipment.
Resetting breakers without a check of insulation may cause damage to equipment.
LG Error Codes:
MODEL NUMBERS: LSN091HSV and LSN121HSV Indoor Units
1: Indoor unit return air thermistor has disconnected or has shorted out. HEATING BLINKS: 1X
2: Indoor unit inlet pipe thermistor has disconnected or has shorted out. HEATING BLINKS: 2X
5: Communication failure from indoor unit to outdoor unit. HEATING BLINKS: 5X
6: Indoor unit outlet pipe thermistor has disconnected or has shorted out. HEATING BLINKS: 6X
9: Indoor unit EEPROM error. HEATING BLINKS: 9X
10: Indoor unit fan has locked up (fan motor operation failure). COOLING BLINKS: 1X
12: Indoor unit middle pipe thermistor has disconnected or has shorted out. HEATING BLINKS: 2X / COOLING BLINKS: 1X
21: DC peak error / IPM fault; compressor DC voltage was too high. HEATING BLINKS: 2X / COOLING BLINKS: 1X
22: Current transformer2 (CT2) error; AC input current is too high. HEATING BLINKS: 2X / COOLING BLINKS: 2X
23: DC link voltage is too low. HEATING BLINKS: 2X / COOLING BLINKS: 3X
25: Voltage to the system is too low or too high. HEATING BLINKS: 2X / COOLING BLINKS: 5X
26: Inverter compressor has seized up or is not providing rotation. HEATING BLINKS: 2X / COOLING BLLINKS: 6X
27: Prospective short circuit (PSC) fault error; current to inverter compressor between AC and DC converter circuit is too high. HEATING BLINKS: 2X / COOLING BLINKS: 7X
28: Inverter compressor DC voltage is too high. HEATING BLINKS: 2X / COOLING BLINKS: 8X
29: Inverter compressor amperage is too high. HEATING BLINKS: 2X / COOLING BLINKS: 9X
31: Current to the current transformer (CT) thermistor is too low. HEATING BLINKS: 3X / COOLING BLINKS: 1X
32: Inverter compressor discharge pipe temperature is too high. HEATING BLINKS: 3X / COOLING BLINKS: 2X
40: Current transformer (CT) thermistor has disconnected or has shorted out. HEATING BLINKS: 4X
41: Inverter compressor discharge pipe thermistor has disconnected or has shorted out. HEATING BLINKS: 4X / COOLING BLINKS: 1X
44. Outdoor unit inlet air thermistor has disconnected or has shorted out. HEATING BLINKS: 4X / COOLING BLINKS: 4X
45. Outdoor unit condenser coil middle thermistor has disconnected or has shorted out. HEATING BLINKS: 4X / COOLING BLINKS: 5X
46. Outdoor unit suction line thermistor has disconnected or has shorted out. HEATING BLINKS: 4X / COOLING BLINKS: 6X
48. Outdoor unit coil outlet (liquid line) thermistor has disconnected or has shorted out. HEATING BLINKS: 4X / COOLING BLINKS: 8X
53. Communication failure from outdoor unit to indoor unit. HEATING BLINKS: 5X / COOLING BLINKS: 3X
60. Outdoor unit PCB EEPROM check sum error. HEATING BLINKS: 6X
61. Outdoor unit condenser coil temperature is too high. HEATING BLINKS: 6X / COOLING BLINKS: 1X
62. Outdoor unit inverter compressor PCB heat sink temperature is too high. HEATING BLINKS: 6X / COOLING BLINKS: 2X
63. Condenser coil pipe thermistor temperature is too low. HEATING BLINKS: 6X / COOLING BLINKS: 3X
65. Heat sink thermistor has disconnected or has shorted out. HEATING BLINKS: 6X / COOLING BLINKS: 5X
67. Outdoor BLDC fan motor lock error. HEATING BLINKS: 6X / COOLING BLINKS: 7X
MODEL NUMBERS: LSU091HSV and LSU121HSV Outdoor Units
21: DC peak error / IPM fault; compressor DC voltage was too high. GREEN: 2X / RED: 1X
22: Current transformer2 (CT2) error; AC input current is too high. GREEN: 2X / RED: 2X
23: DC link voltage is too low. GREEN: 2X / RED: 3X
25: Voltage to the system is too low or too high. GREEN: 2X / RED: 5X
26: Inverter compressor has seized up or is not providing rotation. GREEN: 2X / RED: 6X
27: Prospective short circuit (PSC) fault error; current to inverter compressor between AC and DC converter circuit is too high. GREEN: 2X / RED: 7X
28: Inverter compressor DC voltage is too high. GREEN: 2X / RED: 8X
29: Inverter compressor amperage is too high. GREEN: 2X / RED: 9X
31: Current to the current transformer (CT) thermistor is too low. GREEN: 3X / RED: 1X
32: Inverter compressor discharge pipe temperature is too high. GREEN: 3X / RED: 2X
40: Current transformer (CT) thermistor has disconnected or has shorted out. GREEN: 4X
41: Inverter compressor discharge pipe thermistor has disconnected or has shorted out. GREEN: 4X / RED: 1X
44: Outdoor unit inlet air thermistor has disconnected or has shorted out. GREEN: 4X / RED: 4X
45: Outdoor unit condenser coil middle thermistor has disconnected or has shorted out. GREEN: 4X / RED: 5X
46: Outdoor unit suction line thermistor has disconnected or has shorted out. GREEN: 4X / RED: 6X
48: Outdoor unit coil outlet (liquid line) thermistor has disconnected or has shorted out. GREEN: 4X / RED: 8X
53: Communication failure from outdoor unit to indoor unit. GREEN: 5X / RED: 3X
60: Outdoor unit PCB EEPROM check sum error. GREEN: 6X
61: Outdoor unit condenser coil temperature is too high. GREEN: 6X / RED: 1X
62: Outdoor unit inverter compressor PCB heat sink temperature is too high. GREEN: 6X / RED: 2X
63: Condenser coil pipe thermistor temperature is too low. GREEN: 6X / RED: 3X
65: Heat sink thermistor has disconnected or has shorted out. GREEN: 6X / RED: 5X
67: Outdoor BLDC fan motor lock error. GREEN: 6X / RED: 7X
