LG Multi V5 Service Manual page 130

ERROR CODE TABLES
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 72: 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. • Check the connection on the outdoor unit PCB.
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.
5 0 1 Master outdoor unit loss of phase.
5 0 2 Slave1 outdoor unit loss of phase.
5 0 3 Slave2 outdoor unit loss of phase.
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.)
130
Description
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Details
• Check the connection on the outdoor unit PCB.
• Thermistor shorted or opened.
• Check for 12 V DC between 12 V and GND (red to black) for 5
V DC.
• Check the Signal to GND (white to black) and use correct chart
from Troubleshooting section to compare with actual system
temperature.
• Check the connection on the outdoor unit PCB.
• Thermistor shorted or opened.
• Thermistor shorted or opened.
• Check suction sensor in cooling mode; check hot gas sensor
located near the heat exchanger in heating mode.
• Error can also occur if the system is operating in cooling at
extremely low temperatures with no low ambient kit.
• Check the connection on the outdoor unit PCB.
• Thermistor shorted or opened.
• Defective outdoor unit PCB.
• Check the connection on the outdoor unit PCB.
• Thermistor shorted or opened.
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, then >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, >162 Mbh total of multiple indoor units
connected.
• If the total connected indoor unit nominal capacity exceeds 192
Mbh for a single heat recovery unit.