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Checking Key Components of Unit

- 45 -

Only for training and service purposes

LGE Internal Use Only

• EEV failure check method

Failure mode

Diagnosis Repair process Remark

Microcomputer

Driving circuit

failure

1.Disconnect the EEV connector form control board and

connect testing LED

2. Main power ON, pulse signal is out from EEV for 17 sec.

If LEDs do not turn on, or are in on state continuously,

then driving circuit is abnormal

Check and replace

unit control board

unit

EEV locking 1.If EEV is locked, in no load state, the driving motor rotate,

and clicking sound always occurs

Replace EEV

EEV Motor coil

short or

misconnection

1. Check the resistance between coil terminal

(red-white, red-yellow, red-orange, red-blue)

2. If the estimated resistance value is in 52 ± 3 Ω

then the EEV is normal

Replace EEV

1. Check the resistance between coil terminal

(brown-white, brown-yellow, brown-orange, brown-blue)

2. If the estimated resistance value is in 150 ± 10 Ω

then the EEV is normal

Replace EEV

1K LED

LG Therma V AHBW A0 Series User Manual

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