Multi F Installation Manual
71
Wiring
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
MULTI
F
MAX
MULTI
F
Error
Code
Description
No. of Times Outdoor Unit LEDs
Blink
Outdoor
Operation
Status
LED01 (Red) LED02 (Green)
21 DC Peak (IPM Fault); Compressor DC voltage was too high 2X 1X OFF
22 Current Transformer2 (CT2) error; Alternating current (AC) input too high 2X 2X OFF
23
DC Link Low Voltage (DC Link Voltage is <140VDC)
2X 3X OFF
DC Link High Voltage (DC Link Voltage is >420VDC)
25 AC Low / High Voltage 2X 5X OFF
26 DC Compressor Position Error (Compressor failed to start properly) 2X 6X OFF
27 PSC / PFC Fault; Input current to inverter compressor PCB is too high 2X 7X OFF
29 Current to inverter compressor is too high 2X 9X OFF
32 Inverter compressor discharge pipe (D-Pipe) temperature is too high 3X 2X OFF
35 Low Pressure Error; Pressure dropped below recommended limits 3X 5X OFF
39 Communication Error between PFC MICOM and Inverter MICOM 3X 9X OFF
40 CT Sensor Error; Thermistor is disconnected or has shorted out 4X - OFF
41 Inverter compressor discharge pipe (D-Pipe) sensor is disconnected or has shorted out 4X 1X OFF
43 High pressure sensor is disconnected or has shorted out 4X 3X OFF
44 Outdoor air sensor is disconnected or has shorted out 4X 4X OFF
45 Mid-pipe thermistor of outdoor unit condenser is disconnected or has shorted out 4X 5X OFF
46 Outdoor unit suction piping thermistor is disconnected or has shorted out 4X 6X OFF
48 Outlet piping (liquid) of condenser is disconnected or has shorted out 4X 8X OFF
51
Combination ratio (capacity) is out of range; Total nominal indoor unit capacity is<50%
or >130% of the outdoor unit capacity
5X 1X OFF
53 Communication failure between outdoor unit and indoor unit(s) 5X 3X OFF
54 Outdoor unit is not wired properly (ex: reversed phase) 5X 4X OFF
60 Outdoor unit printed circuit board (PCB) EPROM check sum error 6X - OFF
61 Condenser coil thermistor temperature is too high 6X 1X OFF
62 Outdoor unit inverter compressor PCB heat sink temperature is too high 6X 2X OFF
65 Heat sink thermistor is disconnected or has shorted out 6X 5X OFF
67 Outdoor unit brushless direct current (BLDC) fan motor lock error 6X 7X OFF
73 Outdoor unit PFC overcurrent (peak) error 7X 3X OFF
Error Codes
Table 45: Outdoor Unit Error Codes.
TROUBLESHOOTING