Error No. 26 - LG Multi V5 Service Manual

Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service
WARNING
troubleshooting of the Multi V product.
Error No. Description
26
Outdoor unit in-
Master: 261
verter compressor
operation error.
Slave 1: 262
Slave 2: 263
Is the installation correct?
Yes
Are the power wiring
connections correct?
Yes
Is the resistance be-
tween each phase and the
Inverter compressor insulation
resistance correct?
Yes
Are the compressor wiring
connections correct?
Yes
Is the Inverter
compressor PCB assembly
correct?
Yes
Recheck power and installation.
Details
Inverter compressor start failure.
1. Check if piping is clogged or has been damaged.
2. Check if outdoor or indoor units are blocked.
No
3. Check if EEV is operating normally and the connections are cor-
4. Check the refrigerant pressure.
No
Check R(L1) / S(L2) / T(L3) wiring connections.
1. Check the resistance between each compressor terminal.
Temp.
No
U-V
V-W
W-U
Temp.
U-V
V-W
W-U
2. Check insulation resistance between compressor terminal and pipe
1. Check Inverter compressor PCB assembly, U,V,W connections.
No
2. Check if the wires have disconnected or were damaged.
3. Check compressor terminal connections for bad contacts.
Check if Inverter compressor PCB assembly and IPM are correct.
No
Due to our policy of continuous product innovation, some specifications may change without notification.
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1. Overload error: Piping is clogged, indoor or
outdoor unit is blocked, EEV is blocked, or
there is an overcharge in refrigerant.
2. Compressor insulation and / or motor has
been damaged.
3. Compressor wiring error.
4. Outdoor unit inverter PCB has been dam-
aged (CT).
rect.
JQC068MA
77°F 167°F
JQC068MB / JQC068MBA
77°F 167°F
ERROR CODES

Error No. 26

Causes
JQC048MA
Temp. 77°F 167°F
U-V
V-W
W-U
JQC048MB / JQC048MBA
Temp. 77°F 167°F
U-V
V-W
W-U
151