Mitsubishi Electric MXZ-4C36NAHZ Technical & Service Manual page 118

(1) Operation summary of the linear expansion valve
LEV
2
1
M
4
1
5 3
<Output pulse signal and the valve operation>
Output
(Phase)
1 2 3
1
ON ON OFF
2
OFF ON ON
3
OFF OFF OFF
4
OFF OFF OFF
(2) Linear expansion valve operation
Open
Close
A
Close
B
Extra tightening (about 32 pulse)
OCH573E
Output
4 5 6 7 8
OFF OFF OFF OFF ON
ON OFF OFF OFF OFF
ON ON ON OFF OFF
OFF OFF ON ON ON
Open
500 pulse
Opening a valve
all the way
Pulse number
branch box controller board
12V DC
Red 1
[4
Blue 2
[3
Orange 3
Yellow 4
[2
[1
White 5
Connector LEV-A
LEV-B
LEV-C
LEV-D
LEV-E
A
B A
Drive circuit
[4
[3
[2
[1
B A