Mitsubishi Electric PAC-LV11M-J Installationshandbuch PDF herunterladen (Seite 24)

1) Summary of linear expansion valve (LEV) operation

The LEV is operated by a stepping motor, which operates by receiving a pulse signal from the controller board.

The LEV position changes in response to the pulse signal.

Controller board and LEV connection

Pulse signal output and valve operation

The output pulse changes in the following order:

When the valve closes 1 -> 2 -> 3 -> 4 -> 1

When the valve opens 4 -> 3 -> 2 -> 1 -> 4

When the valve position remains the same, all output signals will be OFF.

If any output signal is missing or if the signal remains ON, the motor vibrates and makes clicking noise.

(A) Brown (F) White

(B) Red (G) Control board

(D) Orange (I) Drive circuit

(E) Yellow (J) Linear expansion valve

Phase

number

Output pulse

1234

ø1 ON OFF OFF ON

ø2 ON ON OFF OFF

ø3 OFF ON ON OFF

ø4 OFF OFF ON ON

(G)

(H)

(I)

(J)

(A)

(B)

(C)

(D)

(E)

(F)

12VDC

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Mitsubishi Electric PAC-LV11M-J Installationshandbuch Seite 24