Mitsubishi Electric PURY-RP200 Service Handbook page 244

[ IX Troubleshooting ]
-5- LEV
LEV operation
Indoor LEV, BC controller LEV1 and 3 (Linear expansion valve) are stepping-motor-driven valves that operate by receiving
the pulse signals from the indoor and outdoor unit control boards.
(1) Indoor LEV and BC controller LEV
The valve opening changes according to the number of pulses.
1) Control boards and the LEV (Indoor LEV, BC controller LEV1 (G1 type only), and LEV3)
LEV
Blue
4
Brown
6
M
Yellow
2
5
1
White Red Orange
Note. The connector numbers on the intermediate connector and the connector on the control board differ. Check the color of the lead wire
to judge the number.
2) Control board and the LEV (BC controller LEV1 (GA1 type only))
LEV
Blue
4
Red
6
M
Yellow
2
5
1
White Orange
3) Pulse signal output and valve operation
Output
(phase)
number
1
1 ON
2 ON
3 OFF
4 OFF
HWE10020
Intermediate connector
4
3
2
1
ø4
ø3
ø2
ø1
Output state
2 3 4
OFF OFF ON
ON OFF OFF
ON ON OFF
OFF ON ON
- 235 -
Brown
2
Red
5
Blue
1
Orange
3
Yellow
4
White
6
Brown
Blue
Orange
Yellow
White
Output pulses change in the following orders when the
Valve is closed; 1
Valve is open; 4
*1. When the LEV opening angle does not change,
all the output phases will be off.
*2. When the output is open phase or remains ON,
the motor cannot run smoothly, and rattles and vibrates.
Outdoor control board
DC12V
6
5
Drive circuit
4
4
3
3
2
2
1
1
Control board
DC12V
6
5
Drive circuit
ø4
4
ø3
3
ø2
2
ø1
1
2 3 4 1
3 2 1 4
GB