LG MULTI F Installation Manual page 48

TROUBLESHOOTING
Error Codes
Troubleshooting Using Error Codes - Continued
Table 23: Multi F / Multi F MAX (with or without LGRED) 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
DC Link Low Voltage (DC Link Voltage is <140VDC)
23
DC Link High Voltage (DC Link Voltage is >420VDC)
25
26 DC Compressor Position Error (Compressor failed to start properly)
27 PSC / PFC Fault; Input current to inverter compressor PCB is too high
29
32 Inverter compressor discharge pipe (D-Pipe) temperature is too high
35 Low Pressure Error; Pressure dropped below recommended limits
39 Communication Error between PFC MICOM and Inverter MICOM
40 CT Sensor Error; Thermistor is disconnected or has shorted out
41 Inverter compressor discharge pipe (D-Pipe) sensor is disconnected or has shorted out
43 High pressure sensor is disconnected or has shorted out
44 Outdoor air sensor is disconnected or has shorted out
45 Mid-pipe thermistor of outdoor unit condenser is disconnected or has shorted out
46 Outdoor unit suction piping thermistor is disconnected or has shorted out
48 Outlet piping (liquid) of condenser is disconnected or has shorted out
Combination ratio (capacity) is out of range; Total nominal indoor unit capacity is<50%
51
53 Communication failure between outdoor unit and indoor unit(s)
54 Outdoor unit is not wired properly (ex: reversed phase)
60 Outdoor unit printed circuit board (PCB) EEPROM check sum error
61 Condenser coil thermistor temperature is too high
62 Outdoor unit inverter compressor PCB heat sink temperature is too high
65 Heat sink thermistor is disconnected or has shorted out
67 Outdoor unit brushless direct current (BLDC) fan motor lock error
73
Refer to Service Manuals posted on www.lghvac.com for a full description of all error codes and workarounds.
48
Description
AC Low / High Voltage
Current to inverter compressor is too high
or >130% of the outdoor unit capacity
Outdoor unit PFC overcurrent (peak) error
Due to our policy of continuous product innovation, some specifications may change without notification.
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MULTI
MULTI
No. of Times Outdoor Unit LEDs
Blink
LED01 (Red) LED02 (Green)
2X 1X
2X 2X
2X 3X
2X 5X
2X 6X
2X 7X
2X 9X
3X 2X
3X 5X
3X 9X
4X -
4X 1X
4X 3X
4X 4X
4X 5X
4X 6X
4X 8X
5X 1X
5X 3X
5X 4X
6X -
6X 1X
6X 2X
6X 5X
6X 7X
7X 3X
F
F
MAX
Outdoor
Operation
Status
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF