LG Multi V Service Manual

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Copyright © 2020 LG Electronics Inc.
All rights reserved. Only training and service purposes.
Self-diagnosis function
n Error diagnosis and countermeasure flow chart
1. Defect of high pressure sensor
2. Defect of indoor or outdoor unit fan
3. Deformation because of damage of refrigerant pipe
4. Over-charged refrigerant
5. Defective indoor / outdoor unit EEV
6. When blocked
- Outdoor unit is blocked during cooling
- Indoor unit filter is blocked during heating
7. SVC valve is clogged
8. PCB defect of outdoor unit
10. Indoor unit pipe temperature sensor defect
Error
No.
Error Type Error Point Main Reasons
Error happens
because of 3 times
successive compres-
sor off due to over-
increase of high pres-
sure by high pressure
sensor
Over-increase of dis-
charge pressure of
compressor
34
Is service valve opened ?
No
Open service valve
Are communication
cable / pipe connection
normal?
Yes
No
Is refrigerant
amount normal?
[refer refrigerant part]
Yes
No
Is fan normal?
(Indoor fan during heating
Outdoor fan during cooling)
Yes
No
Yes
Adjust refrigerant amount
Check and repair communication
cable / pipe connection
Replace related parts
(Refer to Error 105~107)
Is filter blocked
(Heating:indoor,
Cooling:outdoor
heat exchanger)?
No
Clean indoor filter (heating)
/outdoor heat exchanger (cooling)?
Is value of high pressure
sensor same as Manifold
value(Is it high actually)?
No
Replace sensor of high pressure
Yes
Yes
Check indoor unit LEV
Check indoor unit PCB
Check in/outdoor installation
condition

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)