Common Issues; Direct Air Motor; Direct Air Motor Will Not Run; Direct Air Motor Is Making A Squealing Sound - Riccar Radiance RAD.5 Service Manual

A. Direct Air Motor
A.1. Direct Air Motor will not run.
Check the following:
1. The main switch must be "ON" and the floor/carpet switch must be in the carpet position.
2. The tools activation dial/rotational valve handle must be in the tools "OFF" position.
3. The vacuum must be out of the upright position (controlled by the wing rocker switch) unless the nozzle cover is off.
4. The clean air motor must have 12 to 18 volts going to the PC board via the blue/yellow tap wire.
5. The headlights should be on. This assures that the fuses on the PC board are working and there is power in the tap wire. (See
Figure B. PCB Layout and Belt Idler Assembly)
NOTE: All the above conditions must be met on .4 and older models. .5 and newer models must also have the belt installed
belt for the hall sensor to work, other wise the direct air motor will come on for 2 to 3 seconds then shut "OFF".
A.2. Direct Air Motor is making a squealing sound.
Check for the following conditions:
1. The motor has been changed and the seals are out of place or the motor is not seated properly.
2. The bearings are damaged.
3. Hair or thread is wrapped around the motor shaft and the bearing under fan.
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I. Common Issues
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I. Common Issues