LG air conditioner indicator lamps and blink codes
Many units show a fault only by blinking lamps. Find the pattern you see, then open the code.
| Code | How it shows | Meaning |
|---|---|---|
| 1 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 1X Error Display LED (Indoor body operation LED): 3sec 3sec 3sec (once) | Indoor room temperature thermistor open/short; Indoor pipe temperature thermistor… |
| 2 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 2X | Indoor unit inlet pipe thermistor has disconnected or has shorted out |
| 5 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 5X | Communication failure from indoor unit to outdoor unit |
| 6 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 6X | Indoor unit outlet pipe thermistor has disconnected or has shorted out |
| 9 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 9X | Indoor unit EEPROM error |
| 10 | No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 1X | BLDC Motor Fan Lock (Indoor) |
| 12 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 2X No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 1X | Indoor unit middle pipe thermistor has disconnected or has shorted out |
| 21 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 2X No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 1X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 2X No. of Times Outdoor Unit PCB LEDs Blink LED2 (Red): 1X | IPM Fault (Compressor Over current) |
| 22 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 2X No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 2X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 2X No. of Times Outdoor Unit PCB LEDs Blink LED2 (Red): 2X | CT 2 (Max. Current) |
| 23 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 2X No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 3X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 2X No. of Times Outdoor Unit PCB LEDs Blink LED2 (Red): 3X | DC Link Low Volt |
| 24 | LED01G (Red): 2 times LED02G (Green): 4 times | Low / High Pressure |
| 25 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 2X No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 5X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 2X No. of Times Outdoor Unit PCB LEDs Blink LED2 (Red): 5X | AC Low / ACHigh Volts |
| 26 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 2X No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 6X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 2X No. of Times Outdoor Unit PCB LEDs Blink LED2 (Red): 6X | DC Compressor Position |
| 27 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 2X No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 7X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 2X No. of Times Outdoor Unit PCB LEDs Blink LED2 (Red): 7X | PSC Fault (Reactor) |
| 28 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 2X No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 8X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 2X No. of Times Outdoor Unit PCB LEDs Blink LED2 (Red): 8X | DC Link High Volts |
| 29 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 2X No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 9X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 2X No. of Times Outdoor Unit PCB LEDs Blink LED2 (Red): 9X | COMP Over Current |
| 31 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 3X No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 1X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 3X No. of Times Outdoor Unit PCB LEDs Blink LED2 (Red): 1X | Current to the current transformer (CT) thermistor is too low |
| 32 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 3X No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 2X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 3X No. of Times Outdoor Unit PCB LEDs Blink LED2 (Red): 2X | Discharge Pipe Temp. High (INV) |
| 33 | LED01G (Red): 3 times LED02G (Green): 3 times | Discharge Pipe Temp. High (Cons.) |
| 39 | LED01G (Red): 3 times LED02G (Green): 9 times | Communication Error |
| 40 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 4X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 4X LED01G (Red): 4 times | CT Circuit |
| 41 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 4X No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 1X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 4X No. of Times Outdoor Unit PCB LEDs Blink LED2 (Red): 1X | D-Pipe sensor INV. (Open/Short) |
| 44 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 4X No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 4X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 4X No. of Times Outdoor Unit PCB LEDs Blink LED2 (Red): 4X | Air sensor (Open/Short) |
| 45 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 4X No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 5X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 4X No. of Times Outdoor Unit PCB LEDs Blink LED2 (Red): 5X | Cond. Pipe Sensor (Open/Short) |
| 46 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 4X No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 6X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 4X No. of Times Outdoor Unit PCB LEDs Blink LED2 (Red): 6X | Suction Pipe Sensor (Open/Short) |
| 47 | LED01G (Red): 4 times LED02G (Green): 7 times | D-pipe Sensor Cons. (Open/Short) |
| 48 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 4X No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 8X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 4X No. of Times Outdoor Unit PCB LEDs Blink LED2 (Red): 8X | D-Pipe & Air Sensor (Open) |
| 51 | LED01G (Red): 5 times LED02G (Green): 1 times | Over Capacity |
| 52 | LED01G (Red): 5 times LED02G (Green): 2 times | Communication Error (Main micom ↔ Sub micom) |
| 53 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 5X No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 3X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 5X No. of Times Outdoor Unit PCB LEDs Blink LED2 (Red): 3X | Communication Error (Indoor ↔ Outdoor) |
| 54 | LED01G (Red): 5 times LED02G (Green): 4 times | Outdoor 3-Phase Power Supply Reverse Phase / Missing Phase |
| 60 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 6X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 6X LED01G (Red): 6 times | EEPROMCheck Sum |
| 61 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 6X No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 1X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 6X No. of Times Outdoor Unit PCB LEDs Blink LED2 (Red): 1X | Cond. Pipe Sensor Temp. High |
| 62 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 6X No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 2X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 6X No. of Times Outdoor Unit PCB LEDs Blink LED2 (Red): 2X | Heat Sink Sensor Temp. High |
| 63 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 6X No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 3X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 6X No. of Times Outdoor Unit PCB LEDs Blink LED2 (Red): 3X | Cond. Pipe Sensor Temp. Low |
| 65 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 6X No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 5X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 6X No. of Times Outdoor Unit PCB LEDs Blink LED2 (Red): 5X | Heat Sink Sensor (Open/Short) |
| 67 | No. of Times Indoor Unit LEDs Blink LED1 (Heating LED): 6X No. of Times Indoor Unit LEDs Blink LED2 (Cooling LED): 7X No. of Times Outdoor Unit PCB LEDs Blink LED1 (Green): 6X No. of Times Outdoor Unit PCB LEDs Blink LED2 (Red): 7X | Outdoor BLDC Fan Lock |
| 73 | LED01G (Red): 7 times LED02G (Green): 3 times | PFC Fault Error (S/W) |
| 105 | LED01G (Red): 6 times LED02G (Green): 5 times | Comms. Error (Main board ↔Fan board) |
Guides
- Air conditioner repair, stage by stage: from the call to the hand-over
The eight stages of an air conditioner repair: symptoms, safety, reading the code, narrowing down, measuring, repairing, test run, hand-over.