LG Universal System Air Conditioner Service Manual page 100

Troubleshooting Guide
11) Troubleshooting CH40
Display
Title
code
C/T
40
Sensor Error
Check Point
1. Check the input voltage.(200~240V)
2. Check the voltage of C01N at not operating.(0V)
3. Check the voltage of Figure2. red point at not operating.(2.5V)
100 Universal System Air Conditioner
Cause of error
• Initial current error
V
DC 2.5V
V
Check point & Normal condition
• Malfunction of current detection circuit.
(Open / Short)
• The voltage of "C01N" Is 4.0Vdc(25A) .
Figure 1.
Figure 2.