071807 III. General Troubleshooting
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D. Excessive Vibration
1. Check the direct air fan for damage. Replace if necessary. (See II. Maintenance Procedures, J. Replacing the Direct Air Motor Fan)
2. The agitator/brushroll may be out of balance.
3. To test the agitator/brushroll for balance:
Models .4 and older:
1. Remove the agitator/brushroll and run the direct air motor.
2. If vibration stops with the agitator/brushroll removed, replace the agitator/brushroll and retest.
Models .5 and newer:
1. Remove the nozzle cover and install the hall sensor test plug. (If test plug is not installed, the direct air motor will only run 2 to
3 seconds and then shut off.)
2. Remove the agitator/brushroll and run the direct air motor.
3. If vibration stops with the agitator/brushroll removed, replace the agitator/brushroll and retest.
E. Agitator/brushroll Does Not Rotate
1. Check the condition of the belt. Replace if necessary.
2. Check the agitator/brushroll for excessive hair build-up. Clean agitator/brushroll if necessary.
Also see III. General Troubleshooting, B. Direct Air Motor Will Not Run
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