Mitsubishi Electric PUHY-M200YNW-A1 Service Handbook page 293

[8-9 Troubleshooting Problems with Major Components on Hydro unit ]
Troubleshooting flow chart for solenoid valve body
Start
Check for pins not fully inserted on the connector
and check the colors of the lead wires visually.
Intermediate connector
Brown 2
Red 5
Blue 1
To
LEV 3
Orange
4
Yellow
6
White
OK?
YES
Pull out the connector from the board, and check
that the electricity runs with a tester.
The wiring side of CN05 and 07: Among 1, 3 and 5,
and among 2, 4 and 6
OK?
YES
Check the resistance between each coil
with a tester (between red and white,
red and orange, brown and yellow and
brown and blue), and check that the
resistance is 150 within 10%.
OK?
YES
38
- chapter 8
Control board
Brown 6
Red 5
Blue 4
3
Orange
2
Yellow
1
White
NO
Repair the fault.
NO
Repair the fault.
NO
Replace LEV.
When LEV is fully closed : tick sound
When LEV is fully open : no sound
Check the above.
OK?
YES
Check that no refrigerant
leaks from LEV.
NO
OK?
YES
Connect the LED for check,
which is as shown in the
right figure, to the board
connector, and check that
the LED keeps lighting for
10 seconds.
10 k
OK?
YES
Completed
NO
Replace LEV.
Replace LEV.
6
5
4
3
2
1
LED
NO
Replace the board in trouble.
BS_08_E