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Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service
WARNING
troubleshooting of the Multi V product.
Table 76: Error Codes, continued.
Error Code
4
2
1 Master outdoor unit low pressure sensor error.
4
2
2 Slave1 outdoor unit low pressure sensor error.
4
2
3 Slave2 outdoor unit low pressure sensor error.
4
3
1 Master outdoor unit high pressure sensor error.
4
3
2 Slave1 outdoor unit high pressure sensor error.
4
3
3 Slave2 outdoor unit high pressure sensor error.
4
4
1 Master outdoor unit ambient temperature sensor error.
4
4
2 Slave1 outdoor unit ambient temperature sensor error.
4
4
3 Slave2 outdoor unit ambient temperature sensor error.
Master outdoor unit heat exchanger pipe temperature
4
5
1
sensor.
Slave1 outdoor unit heat exchanger pipe temperature
4
5
2
sensor.
Slave2 outdoor unit heat exchanger pipe temperature
4
5
3
sensor.
4
6
1 Master outdoor unit suction pipe temperature sensor error.
4
6
2 Slave1 outdoor unit suction pipe temperature sensor error.
4
6
3 Slave2 outdoor unit suction pipe temperature sensor error.
Master outdoor unit inverter compressor2 discharge
4
7
1
temperature sensor error.
Slave1 outdoor unit inverter compressor2 discharge
4
7
2
temperature sensor error.
Slave2 outdoor unit inverter compressor2 discharge
4
7
3
temperature sensor error.
4
9
1 Master outdoor unit IPM temperature sensor error.
4
9
2 Slave1 outdoor unit IPM temperature sensor error.
4
9
3 Slave2 outdoor unit IPM temperature sensor error.
Master outdoor unit three-phase power is not connect-
5
0
1
ed properly.
Slave1 outdoor unit three-phase power is not connect-
5
0
2
ed properly.
Slave2 outdoor unit three-phase power is not connect-
5
0
3
ed properly.
5
1
1 Combination ratio is out of range.
Total indoor unit capacity exceeds allowable heat
5
1
2
recovery unit branch capacity. (Heat Recovery Systems
only.)
For detailed information on how to troubleshoot each error, see the Multi V Service Manual on www.lghvac.com.
Description
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.
ERROR CODE TABLES
Details
• Check the connection on the outdoor unit PCB.
• Sensor disconnected or shorted.
• Check the connection on the outdoor unit PCB.
• Sensor disconnected or shorted.
• Check the connection on the outdoor unit PCB.
• Thermistor disconnected or shorted.
• Check suction sensor in cooling mode; check hot gas sensor
located near the heat exchanger in heating mode.
• Check the connection on the outdoor unit PCB, then check if
thermistor is open or shorted.
• Thermistor disconnected or shorted.
• Check the connection on the outdoor unit PCB.
• Thermistor disconnected or shorted.
Master outdoor unit inverter compressor2 discharge temperature
sensor disconnected or shorted.
Slave1 outdoor unit inverter compressor2 discharge temperature
sensor disconnected or shorted.
Slave2 outdoor unit inverter compressor2 discharge temperature
sensor disconnected or shorted.
Master outdoor unit IPM temperature sensor disconnected or
shorted.
Slave1 outdoor unit IPM temperature sensor disconnected or
shorted.
Slave2 outdoor unit IPM temperature sensor disconnected or
shorted.
One or more of R(L1), S(L2), T(L3) input power line connections
is / are missing for the master outdoor unit.
One or more of R(L1), S(L2), T(L3) input power line connections
is / are missing for the slave1 outdoor unit.
One or more of R(L1), S(L2), T(L3) input power line connections
is / are missing for the slave2 outdoor unit.
The total of the nominal indoor unit capacity is less than 50% or
more than 130% of the nominal outdoor unit capacity.
Value of total indoor unit capacity exceeds allowable heat recov-
ery unit branch capacity specifications. After auto-pipe detection
is complete, wait 5 minutes, then verify connected capacity.
System will display error if:
• The heat recovery unit port addresses are all unique, but >54
Mbh single indoor unit connected; >54 Mbh total of multiple
IDUs connected.
• If 2 heat recovery unit port addresses are the same and the
ports are twinned; >108 Mbh total of multiple indoor units are
connected.
• If 3 heat recovery unit port addresses are the same and the
ports are all connected, or >162 Mbh total of multiple indoor
units connected.
• If the total connected IDU nominal capacity exceeds 192 Mbh
for a single heat recovery unit.
163
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