LG LMNH122LRA0 Service Manual page 116

Troubleshooting Guide
3) Troubleshooting CH04
Display
Title
code
Drain pump
04
/ Float switch
CN Float
Ω
0
Ω
Check the resistance
Check Point
1. Check the wire connection. (Open, Soldered poorly)
2. Check the resistance of float switch (Abnormal : Open, Normal : short)
3. Check the level of water
4. Check the volt. Of Drain pump power supply. (AC 230V)
116 Multi type Air Conditioner
Cause of error
• Float switch Open.
(Normal : short)
CN-Float
Repair the connection or change the PCB.
Repair or Change the main PCB.
Check point & Normal condition
• The connection of wire(Drain pump/ Float switch)
• Drain pump power input. (220V)
• Drain tube installation.
• Indoor unit installation. (Inclination)
Check the float switch.
CN-D/PUMP