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LG Multi V5 Service Manual

LG Multi V5
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185
Error Codes
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 CODES
Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service
troubleshooting of the Multi V product.
WARNING
Error No. Description Details Causes
105
Master: 1051
Slave 1: 1052
Slave 2: 1053
Communication
error between fan
PCB to inverter
compressor PCB.
Fan PCB did not receive signal from inverter
compressor PCB.
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.
Is the fan PCB commu-
nication LED (yellow) blinking
normally?
Check communication cable between inverter compressor PCB and fan PCB.
ĺ5HFRQQHFWRUUHSODFHZLULQJLIHUURUVDUHIRXQG
No
Yes
Is the inverter
compressor PCB
communication LED (yellow)
blinking normally?
No
Recheck power and installation.
Yes
Is the fan PCB assembly
correct?
Yes
No
Check fan PCB
assembly.
No
Replace inverter PCB assembly.
Yes
Check communication cable between inverter compressor PCB and fan PCB.
ĺ5HFRQQHFWRUUHSODFHZLULQJLIHUURUVDUHIRXQG
Communication Connection
Inverter Compressor PCB Fan PCB Communication
Connection
Images here are representative of system components. Actual component appearance depends on model and system type.
Error No. 105
Check power supply to the inverter 1 and inverter 2 terminals on the main
PCB cable between inverter compressor PCB and fan PCB.
ĺ5HFRQQHFWRUUHSODFHZLULQJHWFLIHUURUVDUHIRXQG
Is the power to the
inverter 1 and / or inverter
2 terminals on the main PCB
below 13.5 V DC?
Yes
No

Table of Contents

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LG Multi V5 Specifications

General IconGeneral
Compressor TypeInverter Scroll
RefrigerantR410A
Energy EfficiencyHigh
Heat RecoveryAvailable
Smart DiagnosisYes
TypeVRF (Variable Refrigerant Flow)
ControlCentralized Control
Power Supply380-415V / 3Ph / 50Hz

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