Troubleshooting Lev Problems; General Overview On Lev Operation - Mitsubishi Electric PURY-P200YLM-A(1) Service Handbook

[8-8 Troubleshooting LEV Problems ]

8-8

Troubleshooting LEV Problems

8-8-1

General Overview on LEV Operation

LEV operation
LEV are stepping-motor-driven valves that operate by receiving the pulse signals from the indoor and outdoor unit control
boards.
(1) Outdoor LEV (LEV5a and 5b), Indoor LEV and BC controller LEV
The valve opening changes according to the number of pulses.
1) Control boards (indoor unit and BC controller) and LEV (indoor unit LEV, and 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 boards (indoor unit and BC controller), LEV (BC controller LEV1 (applicable only to the GA1 and HA1 types), and the
outdoor unit LEV (LEV5a and 5b))
LEV
Blue
4
Red
6
M
Yellow
2
5
1
Orange
White
HWE1314A
Intermediate connector
Brown
2
5
4 1
Orange
3
3
2 Yellow
4
White
1 6
ø4
ø3 Orange
ø2
Yellow
ø1
White
- 322 -
Outdoor control board
DC12V
6
Red
5
Blue
4
3
2
1
Control board
DC12V
6
Red
5
Blue 4
3
2
1
Drive circuit
4
3
2
1
Drive circuit
ø4
ø3
ø2
ø1
GB