LG Multi V5 Service Manual

146
MULTI V 5 Outdoor Unit Service Manual
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
22
Master: 221
Slave 1: 222
Slave 2: 223
Outdoor unit
AC inverter board
input overcurrent
(RMS) error.
The three-phase input power current for the
inverter PCB assembly is >22A.
1. Overload: Pipe has been clogged, EEV is
defective, indoor or outdoor unit is blocked,
there has been an overcharge in refriger-
ant.
2. Compressor motor or insulation has been
damaged.
3. Input voltage is low.
4. Improper connections in the power wiring.
5. Inverter PCB assembly has been damaged
(input current sensor).
Error No. 22
Is the installation
correct?
No
Yes
Yes
Yes
Recheck power and installation.
Yes
1. Check the piping for clogs and damage.
2. Check if the indoor or outdoor unit is blocked.
3. Check if the EEV connection assembly is correct and operating
properly.
4. Check refrigerant pressure.
ĺ$GMXVWRUUHDVVHPEOHLIHUURUVDUHIRXQG
$UHWKH,QYHUWHU3&%DVVHPEO\
bridge diode connections correct?
No
&KHFNEULGJHGLRGHLQ,QYHUWHU3&%,*%70
ĺ5HDVVHPEO\LIHUURUVDUHIRXQG
Yes
,VWKHLQSXWYROWDJHQRUPDO"
No
Check
5a66a77a5SKDVHYROWDJHLVZLWKLQ
ĺ&KHFNFRQQHFWLRQVDQGZLULQJLISRZHULVLQFRUUHFW
Yes
,VWKH,QYHUWHU3&%DVVHPEO\
correct?
No
&KHFNIRU,QYHUWHU3&%DVVHPEO\,30HUURUV
ĺ5HSODFH,QYHUWHU3&% assembly.
$UHWKHUHVLVWDQFH
between each phase and
LQYHUWHUFRPSUHVVRULQVXODWLRQ
resistance correct?
No
1. Check resistance between each compressor terminal.
899::8
2. Check insulation resistance between compressor terminal and
SLSLQJRYHU0ȍ
ĺ5HSODFHFRPSUHVVRULIHUURUVDUHIRXQG
$UHWKHFRPSUHVVRU
wiring connections correct?
No
&KHFN,QYHUWHU3&%DVVHPEO\89:FRQQHFWLRQV
2. Check wiring for disconnections and damage.
3. Check compressor terminal connections for bad contacts.
ĺ5HDVVHPEOHLIHUURUVDUHIRXQG
JQC068MA
Temp. 77°F 167°F
U-V ȍ ȍ
V-W ȍ ȍ
W-U ȍ ȍ
JQC048MA
Temp. 77°F 167°F
U-V ȍ ȍ
V-W ȍ ȍ
W-U ȍ ȍ
JQC068MB / JQC068MBA
Temp. 77°F 167°F
U-V 0.1ȍ ȍ
V-W 0.1ȍ ȍ
W-U 0.1ȍ ȍ
JQC048MB / JQC048MBA
Temp. 77°F 167°F
U-V 0.1ȍ ȍ
V-W 0.1ȍ ȍ
W-U 0.1ȍ ȍ
Always apply heat
transfer paste to the new
inverter PCB heat sink
before installing. For
instructions, see “Re-
placing the Inverter PCB
Heat Sink” page later in
this section.
See the “Checking the Inverter
Insulated-Gate Bipolar Transis-
tor Module” and the “Checking
the Phase Diode Bridge”
pages in the “Troubleshooting
Main Components” section.

LG Multi V5 Specifications

General

Brand	LG
Model	Multi V5
Category	Air Conditioner
Language	English