LG Multi V5 Service Manual

150
MULTI V 5 Outdoor Unit Service Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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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. 25
Error No. Description Details Causes
25
Master: 251
Slave 1: 252
Slave 2: 253
Input voltage to
the outdoor unit
is too high or too
low.
Outdoor unit has an input voltage of <180V or
>253V (for 208-230V units), or an input voltage
of <414V or >528V (for 460V units).
1. Input voltage is abnormal.
2. Outdoor unit inverter PCB assembly is
damaged (input voltage sensor compo-
nent).
Does the Inverter PCB LED
display an error?
Recheck power and installation.
Yes
Is the input voltage
normal?
Yes
Replace Inverter PCB assembly.
Yes
Yes
No
Are the power wiring
connections correct?
No
Check R(L1) / S(L2) / T(L3) wiring connections.
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Check if R~S / S~T / T~R phase voltage is <180V or >253V
(for 208-230V units), or <414V or >528V (for 460V units).
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Are the Inverter
PCB assembly phase
bridge diode connections
correct?
Check the phase bridge diode and Inverter IGBT connections.
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No
No

LG Multi V5 Specifications

General

Brand	LG
Model	Multi V5
Category	Air Conditioner
Language	English