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LG Multi V Service Manual

LG Multi V
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Copyright © 2020 LG Electronics Inc.
All rights reserved. Only training and service purposes.
Self-diagnosis function
25
Input Voltage high/low
Error
No.
Error Type Error Point Main Reasons
Input voltage is over limited
value of the product (142 V
or less, 310 V or more)
1. Input voltage abnormal L1(L)-L2(N)
2. Outdoor unit Inv. PCB damage (input volt-
age sensing part)
3. L2(N) phase line disconnection
n Error Diagnosis and Countermeasure Flow Chart
Yes
Yes
Recheck power and installation condition
Yes
Are there any power wire
connections normal?
No
Yes
1. Check L1(L)-L2(N) wiring conditions
Rewire them if abnormality found.
Is input voltage normal?
No
Check
L1(L) – L2(N) phase voltage is 220 V(±10 %) or 240 V(±10 %)
Check connection condition and wiring if power is
abnormal
Is Inv. PCB
bridge diode joining condition normal?
No
Check joining condition of Inv. PCB and bridge diode
joining again if abnormality found
Yes
Is DC_Link Wire connection
condition normal?
No
1.Check Inv. PCB P,N connector
connection condition
2.Check Inv. PCB P,N connector
connection condition
3. Check wire disconnection and wiring
Reassemble if abnormality found
Inv. PCB LED display error
No
Replace Inv. PCB

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LG Multi V Specifications

General IconGeneral
TypeVRF (Variable Refrigerant Flow)
Compressor TypeScroll
RefrigerantR410A
Energy EfficiencyHigh
Control SystemCentralized and individual control options
Indoor UnitsMultiple types available (e.g., ceiling cassette, wall-mounted, ducted)

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