Error Nos. 44, 45, 46, 49, 153, And 154 - LG Multi V5 Service Manual
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Also See for Multi V5:
- Data manual (162 pages) ,
- Manual book (133 pages) ,
- Engineering manual (105 pages)
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ERROR CODES
Error Nos. 44, 45, 46, 49, 153, and 154
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.
Error No.
Description
44
Outdoor unit
Master: 441
ambient air tem-
perature
Slave 1: 442
sensor error.
Slave 2: 443
45
Outdoor unit heat
Master: 451
exchanger pipe
temperature
Slave 1: 452
sensor error.
Slave 2: 453
Outdoor unit
46
compressor
Master: 471
suction piping
Slave 1: 472
temperature
Slave 2: 473
sensor error.
49
Outdoor unit IGBT
Master: 491
/ IPM temperature
Slave 1: 492
sensor error.
Slave 2: 493
Is the sensor connected
to the PCB correctly?
Yes
Is the sensor value
correct?*
Yes
Replace corresponding
outdoor unit PCB.
Error No.
Description
Outdoor unit
153
upper heat ex-
Master 11: 531
changer
Slave 1 12: 532
temperature
Slave 2 13: 533
sensor error.
154
Outdoor unit lower
Master 11: 541
heat exchanger
temperature
Slave 1 12: 542
sensor error.
Slave 2 13: 543
162
Details
Disconnection or short circuit of outdoor unit
compressor discharge temperature sensor.
Disconnection or short circuit of outdoor unit
heat exchanger temperature sensor.
Disconnection or short circuit of outdoor unit
compressor suction piping temperature sensor.
Disconnection or short circuit of outdoor unit
IGBT / IPM temperature sensor.
No
Connect the sensor to PCB
correctly.
No
Replace the sensor.
Sensor resistance value may vary with the temperature.
See below for the resistance values according to temperature
Details
Disconnection or short circuit of outdoor unit
upper heat exchanger temperature sensor.
Disconnection or short circuit of outdoor unit
lower heat exchanger temperature sensor.
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.
Causes
1. Check the connection on the outdoor unit
PCB.
2. Thermistor shorted or opened.
1. Check the connection on the outdoor unit
PCB.
2. Thermistor shorted or opened.
3. Check suction sensor in cooling mode;
check hot gas sensor located near the heat
exchanger in heating mode.
1. Check the connection on the outdoor unit
PCB.
2. Thermistor shorted or opened.
Causes
1. Temperature sensor is not connected
properly.
2. Temperature sensor is defective (discon-
nected or short circuited).
3. Defective outdoor unit main PCB.
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Table of Contents
Troubleshooting
