LG Multi V5 Service Manual page 133
Hide thumbs
Also See for Multi V5:
- Data manual (162 pages) ,
- Manual book (133 pages) ,
- Engineering manual (105 pages)
Table of Contents
Advertisement
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 75: Error Codes, continued.
Error Code
Master outdoor unit liquid pipe temperature sensor
1 1 3 1
error.
Slave1 outdoor unit liquid pipe temperature sensor
1 1 3 2
error.
Slave2 outdoor unit liquid pipe temperature sensor
1 1 3 3
error.
Master outdoor unit subcooling inlet temperature
1 1 4 1
sensor error.
Slave1 outdoor unit subcooling inlet temperature
1 1 4 2
sensor error.
Slave2 outdoor unit subcooling inlet temperature
1 1 4 2
sensor error.
Master outdoor unit subcooling outlet temperature
1 1 5 1
sensor error.
Slave1 outdoor unit subcooling outlet temperature
1 1 5 2
sensor error.
Slave2 outdoor unit subcooling outlet temperature
1 1 5 3
sensor error.
Master outdoor unit low oil level or oil level sensor
1 1 6 1
error.
1 1 6 2 Slave1 outdoor unit oil level sensor error.
1 1 6 3 Slave2 outdoor unit oil level sensor error.
Communication error between master outdoor unit
1 4 5 1
main board and external board.
Communication error between slave1 outdoor unit
1 4 5 2
main board and external board.
Communication error between slave2 outdoor unit
1 4 5 3
main board and external board.
Master outdoor unit compressor discharge superheat
1 5 0 1
not satisfied.
Slave1 outdoor unit compressor discharge superheat
1 5 0 2
not satisfied.
Slave2 outdoor unit compressor discharge superheat
1 5 0 3
not satisfied.
1 5 1 1 Master outdoor unit difference between high and low
pressure is too low.
1 5 1 2 Slave1 outdoor unit difference between high and low
pressure is too low.
1 5 1 3 Slave2 outdoor unit difference between high and low
pressure is too low.
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.
• 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.
• Master outdoor unit may have low oil levels.
• Master outdoor unit oil level sensor disconnected or shorted.
• Slave1 outdoor unit may have low oil levels.
• Slave1 outdoor unit oil level sensor disconnected or shorted.
• Slave2 outdoor unit may have low oil levels.
• Slave2 outdoor unit oil level sensor disconnected or shorted.
Master outdoor unit main board to external board communica-
tion failure.
Slave1 outdoor unit main board to external board communica-
tion failure.
Slave2 outdoor unit main board to external board communica-
tion failure.
Code indicates that based on current superheat measurements,
there is a high possibility of liquid refrigerant flooding back and
damaging the compressor.
• Outdoor unit compressor discharge superheat not satisfied for
• Code can only occur when the outdoor is operating in cooling
mode (all indoor units must be in cooling mode; error cannot
occur during simultaneous operation).
• After at least 10 minutes of compressor operation, the master
outdoor unit microprocessor will calculate the system's com-
pressor superheat. If at any time during compressor operation
where all indoor units in thermal on are in cooling mode and
there is a high probability that liquid could flood back to the in-
let of the compressor scroll, resulting in compressor damage.
• If error occurs 3 times within any 1 hour period of compressor
operation, the system will shut down and remain off. A manual
restart will be necessary.
Not enough pressure difference between high and low. Function
error of outdoor unit four-way reversing valve (defective, discon-
133
Advertisement
Table of Contents
Troubleshooting
