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Outdoor LEV
The valve opening angle changes in proportion to the number of pulses.
(Connections between the outdoor unit’s MAIN board and SLEV, LEV1 (outdoor electronic expansion valve))
Pulse Signal Output and Valve Operation
LEV Valve Closing and Valve Opening Operations
✻
When the power is switched ON, a 520 pulse valve
opening signal is output to make sure the valve’s
position, so that it is definitely at point A. (The pulse
signal is output for approximately 17 seconds.)
When the valve operates smoothly, there is no
sound from the LEV and no vibration occurs, but
when the valve is locked, it emits a noise.
✻
Whether a sound is being emitted or not can be de-
termined by holding a screwdriver, etc. against it,
then placing your ear against the handle.
✻
If there is liquid refrigerant inside the LEV, the sound
may become lower.
Output pulses change in the following orders when the
Valve is Closed 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 1
Valve is Open 8 → 7 → 6 → 5 → 4 → 3 → 2 → 1 → 8
✻
1.When the LEV opening angle does not change, all
the output phases are off.
2.When the output is out of phase or remains ON con-
tinuously, the motor cannot run smoothly, but move
jerkily and vibrates.
Output State
12345678
ø1 ON OFF OFF OFF OFF OFF ON ON
ø2 ON ON ON OFF OFF OFF OFF OFF
ø3 OFF OFF ON ON ON OFF OFF OFF
ø4 OFF OFF OFF OFF ON ON ON OFF
Output (Phase)
No.
Driver Circuits
Outdoor MAIN Board
(Connectors CNLV1,
CNLV2)
Gray
Black
Yellow
Red
Orange
Valve Opening Angle (Flow Rate)
Valve
Closing
Valve Opening
Fully Open
480 pulses
Pulse Count
-
46
-