LG Multi V Service Manual

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All rights reserved. Only training and service purposes.
Self-diagnosis function
Is input voltage normal?
No
Yes
Yes
Yes
Recheck power and installation condition
Check
L1(L)-L2(N) phase are 220 V(±10 %) or 240 V(±10 %)
(for 1 phase model)
→ Check connection condition and wiring if power is
abnormal
Is inverter PCB assembly
power connection normal?
No
Check connection from terminal block to inverter PCB
assembly
→ wiring again if abnormality found
Is inverter PCB assembly normal?
No
Check inverter PCB assembly IPM normality
→ Replace inverter PCB assembly
23
Inverter Compressor DC
Link Low Voltage
Error
No.
Error Type Error Point Main Reasons
DC Voltage isn't charged
after starting relay on
1. DC Link terminal misconnection/terminal
contact fault
2. Starting relay damage
3. Condenser damage
4. Inverter PCB assembly damage
(DC Link voltage sensing part)
5. Input voltage low
n Error Diagnosis and Countermeasure Flow Chart

LG Multi V Specifications

General

Type	VRF (Variable Refrigerant Flow)
Compressor Type	Scroll
Refrigerant	R410A
Energy Efficiency	High
Control System	Centralized and individual control options
Indoor Units	Multiple types available (e.g., ceiling cassette, wall-mounted, ducted)