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Single Zone High Efficiency W
all Mounted Installation Manual
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TROUBLESHOOTING
Error Codes
Table 21: Single Zone Wall Mounted Outdoor Unit Error Codes
Error
Code
Description
No. of Times Outdoor Unit
LEDs Blink
LED1
(Plasma LED)
LED2
(Power LED)
21
DC Peak (IPM Fault); Compressor DC voltage was too high
2X
1X
22
Current Transformer2 (CT2) error; Alternating current (AC) input too high
2X
2X
23
DC Link Low Volt
2X
3X
25
AC Low/High Volt
2X
5X
26
DC Comp Position Error (not providing rotation), Locking
2X
6X
27
PSC Fault; Current to inverter compressor between AC and DC converter circuit too high
2X
7X
28
Inverter compressor DC voltage is too high
2X
8X
29
Inverter compressor amperage is too high
2X
9X
31
Current-to-current transformer (CT) thermistor is too low
3X
1X
32
Inverter Compressor Discharge Pipe (D-Pipe) Overheat
3X
2X
40
CT Sensor Error; Thermistor is disconnected or is shorted out
4X
-
41
D-Pipe Sensor INV is disconnected or shorted out
4X
1X
44
Outdoor Air Sensor is disconnected or shorted out
4X
4X
45
Middle thermistor of outdoor unit condenser coil is disconnected or shorted out
4X
5X
46
Outdoor unit suction line thermistor is disconnected or shorted out
4X
6X
48
Outdoor unit coil outlet (liquid line) thermistor is disconnected or shorted out
4X
8X
53
Communication failure from outdoor unit to indoor unit
5X
3X
60
Outdoor unit printed circuit board (PCB) EPROM check sum error
6X
-
61
Outdoor unit condenser coil temperature is too high
6X
1X
62
Outdoor unit inverter compressor PCB heat sink temperature is too high
6X
2X
63
Condenser coil pipe thermistor temperature is too low
6X
3X
65
Heat sink thermistor has disconnected or has shorted out
6X
5X
67
Outdoor brushless direct current (BLDC) fan motor lock error
6X
7X
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. The indoor unit error
codes, however, 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 for indoor or outdoor units.
Refer to Service Manuals posted on www.lghvac.com for a full description of all error codes and workarounds.