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Part 5. Trouble Shooting

- 55 -

Only for training and service purposes

LGE Internal Use Only

Check the resistance

0Ω

CN Float

CN-Float

CN-D/PUMP

Drain pump

/ Float switch

• Float switch Open.

(Normal : short)

• The connection of wire(Drain pump/ Float switch)

• Drain pump power input. (230V)

• Drain tube installation.

• Indoor unit installation. (Inclination)

Display

code

Title Cause of error Check point & Normal condition

Check Point

1. Check the wire connection. (Open, Soldered poorly) ’ Repair the connection or change the PCB.

2. Check the resistance of float switch (Abnormal : Open, Normal : short) ’ Check the float switch.

3. Check the level of water

4. Check the volt. Of Drain pump power supply. (AC 230V) ’ Repair or Change the main PCB.

LG LMN078HVT User Manual

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