Error No. 105 - 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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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
105
Communication
error between fan
Master: 1051
PCB to inverter
Slave 1: 1052
compressor PCB.
Slave 2: 1053
Is the fan PCB commu-
nication LED (yellow) blinking
normally?
Yes
Is the inverter
compressor PCB
communication LED (yellow)
blinking normally?
Is the power to the
inverter 1 and / or inverter
2 terminals on the main PCB
below 13.5 V DC?
Yes
Is the fan PCB assembly
correct?
Yes
Recheck power and installation.
Inverter Compressor PCB
Connection
Communication Connection
Images here are representative of system components. Actual component appearance depends on model and system type.
Fan PCB did not receive signal from inverter
compressor PCB.
No
No
Yes
No
No
Fan PCB Communication
Due to our policy of continuous product innovation, some specifications may change without notification.
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Details
Check communication cable between inverter compressor PCB and fan PCB.
Check communication cable between inverter compressor PCB and fan PCB.
Check power supply to the inverter 1 and inverter 2 terminals on the main
PCB cable between inverter compressor PCB and fan PCB.
Check fan PCB
assembly.
Yes
ERROR CODES
Error No. 105
Causes
1. Inverter compressor PCB and fan PCB
connection is not correct.
2. Fan PCB power is not supplied.
3. Outdoor unit inverter compressor PCB and /
or fan PCB is / are defective.
4. Power supply PCB is not functioning prop-
erly: power to the inverter 1 and inverter 2
terminals on the main PCB is below 13.5 V
DC.
No
Replace inverter PCB assembly.
185
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Troubleshooting
