LG Multi V5 Service Manual page 152

ERROR CODES
Error No. 26, continued.
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.
Measure resistance between
compressor terminals.
Images here are representative of system components. Actual component appearance depends on model and system type.
Table 80: Error No. 26 Checkpoint Details.
Cause
Check Inverter PCB appearance
Measure 5V,15V line
Inverter PCB
IGBTM (Check IGBT)
Damaged
Inverter Drive Circuit
Figure 73: Two Compressor Additional Check Procedure (Same Capacity Inverter Only).
Standard Connection.
Example: Inverter 1, CH26
displayed.
Inv.1
Inv.2
- CH26
Comp.1 Comp.2
152
Compressor wiring connections.
Check
Check Point
Appearance
5V, 15V Resistance
P-U,V,W / N-U,V,W
(Check diode)
If Inverter 2 has CH26 displayed,
then Comp. 1 is defective.
Inv.1
Comp.1
Due to our policy of continuous product innovation, some specifications may change without notification.
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Checklist
Normal
Good
0.38V ~ 0.7V
Diode 0.38V ~ 0.7V
Cross Connections after Operation.
Inv.2
- CH26
or
Comp.2
Defective
Abnormal
Parts
Damage
Inverter PCB
Non-normal
Non-normal
If Inverter 1 consistently displays
CH26, then Inverter 1 is defective.
Inv.1
Inv.2
- CH26
Comp.1 Comp.2
App.
B1 (Power Off)