AOC 15 - Manual (Page 110)

12.0 Troubleshooting
NOTICE: Use of the material contained in this document is subject to the warning on page Iv and the disclaimer
on page v of this document.
DOC012R02 AOC 15/50 User Manual Nov 2001
102
12.6 Yaw Bearing
The yaw bearing allows the wind turbine to align itself with the wind. When the blades turn, the
turbine should yaw into the proper position with the rotor facing downwind from the rest of the
machine. If the wind turbine does not yaw correctly with respect to the wind, the yaw bearing
should be greased and visually inspected. It should also be checked to see whether it is level;
any necessary adjustments should be made via the anchor bolts at the tower base.
12.7 Troubleshooting Summary
The operator interface, illustrated in Figure 12.7-1, is located on the control enclosure. The
indicating lights assist the operator in determining system status, as well as major fault
indicators.
Symptom Potential Cause Resolution
Turbine does not start
1. Not switched on
2. No wind or wind speeds too high
3. Parking brake applied
4. Anemometers not operational
5. Control fault
6. Dynamic brake cooling
7. Transmission failure
8. Grid monitor not set for site
specifics
1. Switch on
2. Wait for proper wind
3. Release brake, check power
4. Check wiring and for icing
5. Clear fault
6. Allow brake to cool (20 min.)
7. Inspect transmission, oil level
8. Open grid monitor settings and
work back to establish set points
Turbine does not
connect to grid
1. Not enough wind speed
2. Speed sensor fault/set points
3. Too cold (oil viscous)
1. Wait for wind
2. Check wiring, sensor condition
and adjust set points
3. Need across-the-line start
Premature tip brake
deployment
1. Magnet and/or electrical
connection faulty
2. Misadjusted magnet and/or
catch-plate
3. Rotary transformer fault
1. Check wiring, leads. Test
magnet using 12v battery.
2. Check spacing between
magnet and catch-plate
3. Inspect, test transformer
Tip brake(s) does not
deploy
1. Iced or corroded
1. Clear debris
Parking brake does not
engage, hold rotor
stopped
1. Corroded or pressure spring
faulty
2. Pads worn
1. Try to apply manually.
Disassemble brake and check
springs and clean off corrosion
2. Check pads and replace if