USAfixTM - Repair Guide (RG) - Master Email RG
- Testing the potentiometer
 Level of Difficulty - HIGH  Estimated Completion Time - 5 minutes
TENNANT - 2550

Tools Required
Tool 
Screwdriver-phillips
Volt meter (True RMS capable)

Parts Required


Step Procedure & Parts & Tools
1 REMOVE THE 4 SCREWS HOLDING THE FRONT PANEL COVER.
Screwdriver-phillips

2 PULL THE PANEL COVER DOWN TO EXPOSE THE WIRING.

3 PUSH THE BUTTON ON THE TOP PANEL TO POWER MACHINE.

4 CONNECT THE VOLT METER PROBES TO THE DRIVE MOTOR WIRES LOCATED AT THE BACK, BOTTOM OF THE MACHINE.
Volt meter (True RMS capable)

5 TURN ONE OF THE HANDLES ALL THE WAY FORWARD AND HOLD WHILE PERFORMING NEXT STEP.

6 TURN THE SPEED KNOB (POTENTIOMETER) ALL THE WAY TOWARDS THE HANDLE. THE VOLT METER SHOULD READ 5 VOLTS. TURN THE SPEED KNOB ALL THE WAY FORWARD (AWAY FROM THE HANDLE). THE VOLT METER SHOULD READ 36 VOLTS. IF POTENTIOMETER DOESN'T FALL IN THIS RANGE, REPLACE THE POTENTIOMETER.
Volt meter (True RMS capable)