LG Single "A" Service Manual page 92

6.8 Check code Trouble shooting CH04
Display
Title
code
Drain pump
04
/ Float switch
Check Flow Chart
Check the level of
water (Float moves top
position)
Is it normal ?
Yes
Is the float
switch clean ?
Yes
Check the wire
connection (Open,
Soldered poorly)
Is it normal ?
Yes
Is the resistance of f
loat switch normal
(short) ?
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Only for training and service purposes
Cause of error
• Float switch open.
(Normal : short)
• Water over flow
No
Check Drain Pump
No
Clean float switch
No
Correct connection
Or re-soldering PCB
No
Change the float switch
- 91 -
Check point & Normal condition
• The connection of wire (Drain pump/ Float switch)
• Drain pump power input. (220V)
• Drain tube installation.
• Indoor unit installation. (Inclination)
CN-Float
❊ Drain pump check
Check the wire
connection (Open,
Soldered poorly)
Is it normal ?
Yes
Is the resistance of
Drain Pump? Normal
( about 400Ω ) ?
Yes
Is the drain
pump clean ?
Yes
Check drain tube
installation
5. Trouble Shooting
CN-Float
No
Correct connection
Or re-soldering PCB
No
Change the Drain Pump
No
Clean drain pump
LGE Internal Use Only