LG LA090HYV3 Installation Manual page 76

TROUBLESHOOTING
Error Codes
Single Zone Wall Mounted Outdoor Unit Error Codes
The Single Zone Wall Mounted outdoor unit error codes are visible on the outdoor unit, as well as from the indoor unit. However, the indoor
unit error codes are only visible from the indoor unit and will not display at the outdoor unit. When troubleshooting the system, be sure to
verify if the error codes that are being displayed are specific to the indoor or outdoor unit.
Table 26: Single Zone Wall Mounted Outdoor Unit Error Codes.
Error
Code
21 DC Peak (IPM Fault); Compressor DC voltage was too high
22 Current Transformer2 (CT2) error; Alternating current (AC) input too high
23 DC Link Low Volt
25 AC Low / High Volt
26 DC Comp Position Error (not providing rotation), Locking
27 PSC Fault; Current to inverter compressor between AC and DC converter circuit too high
28 Inverter compressor DC voltage is too high
29 Inverter compressor amperage is too high
31 Current-to-current transformer (CT) thermistor is too low
32 Inverter Compressor Discharge Pipe (D-Pipe) Overheat
40 CT Sensor Error; Thermistor is disconnected or is shorted out
41 D-Pipe Sensor INV is disconnected or shorted out
44 Outdoor Air Sensor is disconnected or shorted out
45 Middle thermistor of outdoor unit condenser coil is disconnected or shorted out
46 Outdoor unit suction line thermistor is disconnected or shorted out
48 Outdoor unit coil outlet (liquid line) thermistor is disconnected or shorted out
53 Communication failure from outdoor unit to indoor unit
60 Outdoor unit printed circuit board (PCB) EEPROM check sum error
61 Outdoor unit condenser coil temperature is too high
62 Outdoor unit inverter compressor PCB heat sink temperature is too high
63 Condenser coil pipe thermistor temperature is too low
65 Heat sink thermistor has disconnected or has shorted out
67 Outdoor brushless direct current (BLDC) fan motor lock error
Refer to Service Manuals posted on www.lghvac.com for a full description of all error codes and work-arounds.
76
Description
Due to our policy of continuous product innovation, some specifications may change without notification.
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No. of Times Outdoor Unit
LEDs Blink
LED1 LED2
2X 1X
2X 2X
2X 3X
2X 5X
2X 6X
2X 7X
2X 8X
2X 9X
3X 1X
3X 2X
4X -
4X 1X
4X 4X
4X 5X
4X 6X
4X 8X
5X 3X
6X -
6X 1X
6X 2X
6X 3X
6X 5X
6X 7X