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The phenomena from main component failure
ø1
ø3
ø2
ø4
M
Brown
Red
White
Red
Yellow Brown Blue
Orange
Red
Blue
Orange
Yellow
Valve
open
Angle
close
pulse
open
Full open
1 950 pulses
EEV
• Pulse signal output value and valve operation
• Output pulse sequence
- In valve close state: 4
’
3
’
2
’
1
’
4
- In valve open state: 1
’
2
’
3
’
4
’
1
* 1. If EEV open angle does not change, all of output phase will be OFF
2. If output phase is different or continuously in the ON state, motor will not operate smoothly and start vibrat-
ing.
• EEV valve operation
ø1
ON
ON
OFF
OFF
ø2
ON
ON
ON
ON
ø3
OFF
OFF
OFF
ON
ø4
OFF
OFF
OFF
OFF
Output(ø) No.
Output state
1
2
3
4
- At power ON, open angle signal of 2 000 pulses output and
valve position is set to
ⓐ
If valve operates smoothly, no noise and vibration occurs and
if valve is closed. noise occurs.
- Noise from EEV can be confirmed by touching the EEV sur-
face with a screw driver and listening the EEV noise.
- If liquid refrigerant is in EEV, the noise is lower.
