LG LSN120HSV4 - Page 76

Part 5. Trouble Shooting
- 76 -
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Check Point
1. Check the Input Voltage (L1~L2 ‘ 230V±10%)
2. Check Input Voltage Sensor output voltage (2.5Vdc±10%)
Is Inverter PCB Normal?
No
Replace inverter PCB assembly
Is input voltage normal ?
No
Check L1~L2 Voltage is 230V±15%
Yes
Recheck power and
installation condition
Yes
< Input Power Source Check Point >
L1
L2
n Error Diagnosis and Countermeasure Flow Chart
40
C/T
Sensor Error
• Initial current error
• Malfunction of current detection circuit.
(Open / Short)
• Check CT Sensor output voltage :
2.5Vdc ±5%
Display
code
Title Cause of error Check point & Normal condition
WARNING
Before checking PCB or each outdoor electric parts, wait for 3 minutes after the power is off. When measuring at standby state
of power supply, after checking the measurement mode of the meter, be careful of the short-circuits with other parts.
n Error Diagnosis and Countermeasure Flow Chart