LG AMNH076LQL0 Service Manual page 192

Troubleshooting Guide
8) Troubleshooting CH24, CH25
Display
Title
code
24
Press S/W Open
Input voltage
25
TRANS1
50Hz, DC12V
Check Point
• CH 24
1. Check the connection of "CN_PRESS"
2. Check the component of press switch.
3. Check the install condition for over load.
4. Check the SVC V/V open.
5. Check the leakage of refrigerant.
192 Multi type Air Conditioner
Cause of error
• Low / High press
S/W open.
• Abnormal Input voltage
(140Vac , 300Vac
• CH 25
1. Check the power source.
2. Check the components
❈ Trans1
- Primary resistance : 2.27kΩ ±10%
- Secondary resistance : 9Ω ±10%
Check point & Normal condition
• Check the connection of "CN_Press".
• Check the components.
Check the power source.
• Check the components.
)