LG General Wall Mounted-Inverter Type - Manual (Page 61)

Service Manual 61
Part 4 Trouble Shooting
6) Troubleshooting CH24, CH25
CN TRNAS1
CN PRESS
TRANS1
50Hz, DC12V
24
25
Press S/W Open
Input voltage
• Low / High press
S/W open.
• Abnormal Input voltage
(140VAC , 300VAC ).
• Check the connection of “CN_Press”.
• Check the components.
• Check the power source.
• Check the components.
Error
code
Title Cause of error Check point & Normal condition
Check Point
• CH 24
1. Check the connection of “CN_PRESS”
2. Check the install condition for over load.
3. Check the SVC V/V open.
4. Check the leakage of refrigerant.
• CH 25
1. Check the power source.
2. Check the components
(Trans1, B/Diode, Diode, Resistance)