Miele W1903 User Manual page 46

Technical Information
W1918 /-30 /-26 /-66 /-86 Clothes Washers Electronic Check
1. Turn the appliance OFF.
2. Locate and unplug the ribbon cable connector from the Upper Electronic
Board.
3. Close the Door.
4. Set the program selector to the START position.
5. Turn the appliance ON.
6. Ensure the Ribbon Cable is secured to the Lower Electronics, only.
7. Counting from left to right, locate pins 9 and 10 on the unplugged ribbon
cable
connector.
8. Measure the DC voltage between pins 9 and 10. Voltage from 4VDC to
6VDC is
acceptable
9. Locate pins 12 and 13 on the unplugged ribbon cable connector.
10. Measure the voltage between pins 12 and 13. Voltage from 25VDC to 33
VDC is acceptable.
Are both voltages within tolerance?
Lower electronic is OK
11. Turn the appliance OFF.
12. Reconnect the ribbon cable to the Upper Electronic.
13. Locate pins 10 and 11 on the Lower Electronic Ribbon Cable Connector.
14. Turn the appliance ON.
15. Measure the voltage between pins 10 and 11. Voltage from 1.4VDC to
2.4VDC is acceptable.
Is the voltage within tolerance?
Both Electronics are OK /
Troubleshoot elsewhere.
YES
YES
46
W1900 Series Clothes Washers
NO
Replace the Lower electronic
NO
Replace the Upper Electronic