LG MULTI F LMU183HV Installation Manual page 93

F
MULTI
F
MULTI MAX
service troubleshooting of the Multi F / Multi F MAX product.
Table 45: Outdoor Unit Error Codes.
Error
Code
21 DC Peak (IPM Fault); Compressor DC voltage is too high
22 Current Transformer2 (CT2) error; Alternating current (AC) input is 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 open or has short circuited
41 Inverter compressor discharge pipe (D-Pipe) sensor is open or has short circuited
43 High pressure sensor is open or has short circuited
44 Outdoor air sensor is open or has short circuited
45 Mid-pipe thermistor of outdoor unit condenser is open or has short circuited
46 Outdoor unit suction piping thermistor is open or has short circuited
48 Outlet piping (liquid) of condenser is open or has short circuited
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 open or has short circuited
67 Outdoor unit brushless direct current (BLDC) fan motor lock error
73
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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ERROR CODE TABLES
No. of Times Outdoor Unit LEDs
Blink
LED01 (Red)
2X
2X
2X
2X
2X
2X
2X
3X
3X
3X
4X
4X
4X
4X
4X
4X
4X
5X
5X
5X
6X
6X
6X
6X
6X
7X
Outdoor
Operation
Status
LED02 (Green)
1X OFF
2X OFF
3X OFF
5X OFF
6X OFF
7X OFF
9X OFF
2X OFF
5X OFF
9X OFF
- OFF
1X OFF
3X OFF
4X OFF
5X OFF
6X OFF
8X OFF
1X OFF
3X OFF
4X OFF
- OFF
1X OFF
2X OFF
5X OFF
7X OFF
3X OFF
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