LG ARUN Series Service Manual page 128

Troubleshooting Guide
Error No. Error Type
107*
Master
Fan DC Link Low
11 ¡ 071
Voltage Error
Slave
12 ¡ 072
I Error Diagnosis and Countermeasure Flow Chart
Is wiring between fan motor
and PCB normal?
Yes
Is DC_Link voltage normal?
Yes
Is Fan PCB assembly normal?
Yes
Recheck power and
installation condition
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Error Point
Fan PCB DC link voltage supplied
below 380V
No
1. Check DC_Link Wire connection
2. DC_Link
¡ Replace wire if abnormality found
No
Measure DC_Link voltage
¡ Check inverter PCB if voltage is below 380V
No
Replace fan PCB assembly
DC voltage connection
DC Volt connected
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Main Reasons
1. Wrong wiring between inverter PCB and
Fan PCB
2. Fan PCB assembly defect
LGE Internal Use Only