Multi F Four-Way Ceiling Cassette Service Manual

- 59 -

Only for training and service purposes

LGE Internal Use Only

Part 5. Trouble Shooting

Display

code

Title Cause of error Check point & Normal condition

23 DC Link High / Low Volt

• DC Link Voltage is above

420Vdc

• DC Link Voltage is below

140Vdc

• Check Input Voltage

• Check PCB DC Link voltage sensor parts

5V_GND5V_GND5V_GND

DC_LINK

Recheck power and

installation condition

Yes

WARNING

Before checking PCB or each outdoor electric parts, wait for 3 minutes after the power is off. When measuring at standby state

of power supply, after checking the measurement mode of the meter, be careful of the short-circuits with other parts.