LG Multi V CRUN Series Service Manual page 215

• LEV failure check method
* Attention: Outdoor unit LEV and Indoor unit LEV are different in specification,
so the repair process may be different
Failure mode
Microcomputer 1.Disconnect the LEV connector form control board and
Driving circuit connect testing LED
failure
2. Main power ON, pulse signal is out from LEV for 17 sec.
If LEDs do not turn on, or are in on state continuously,
then driving circuit is abnormal
LEV locking 1.If LEV is locked, in no load state, the driving motor rotate,
and clicking sound always occurs
LEV Motor coil 1. Check the resistance between coil terminal
short or (red-white, red-yellow, red-orange, red-blue)
2. If the estimated resistance value is in 52 ± 3Ω
misconnection
then the LEV is normal
1. Check the resistance between coil terminal
(brown-white, brown-yellow, brown-orange, brown-blue)
2. If the estimated resistance value is in 150 ± 10Ω
then the LEV is normal
Full closing 1. Operate indoor unit with FAN mode and operate another
(valve leakage) indoor unit with COOLING mode
2. Check indoor unit(FAN mode) liquid pipe temperature
(from operation monitor of outdoor unit control board)
3. When fan rotate and LEV is fully closed, if there is any
leakage, then the temperature is down
If estimated temperature is very low in comparison with
suction temperature which is displayed at remote
controller then the valve is not fully closed
Diagnosis
1K LED
Checking Method for Key Components
Repair process
Check and replace
Indoor unit control
board
Replace LEV
Replace LEV
Replace LEV
If the amount of
leakage is much,
Replace LEV
Service Manual 215
Unit
Indoor
unit
Indoor
/ Outdoor
unit
Outdoor
unit
Indoor
unit
Indoor
unit