Minuteman C8420-115_C8420-240 Ambassador 20 - Manual (Page 23)

Parts and Instruction Manual
Page 20
Electrical System A.C.
Solution Recovery (cont’d)
II. Pump motor does not run.
A. Check pressure switch for short circuit. By-pass the pressure switch by connecting
the two black leads to the switch to one another, if the motor then runs, replace the
pressure switch.
III. Machine fails to run when handle switch is activated.
A. Speed control maybe shorted out.
B. Speed control potentiometer may be defective.
I. Vacuum motor does not start.
A. Inspect the micro switch lever inside the electrical enclosure to make sure it is
functioning properly. As the scrub head is lowered the lever should activate
the switch. Bend the switch lever to adjust function if required.
B. Check motor carbon brush.
C. Check plugs on power cord.
FOR ALL THE ABOVE MAKE SURE ALL THE ELECTRICAL CONNECTIONS ARE SECURE. MAKE SURE THE CORD
TO THE WALL OUTLET IS SECURE. MAKE SURE THE GFCI IS NOT TRIPPED IF THE UNIT IS EQUIPPED WITH ONE
(LOCATED ON POWER CORD).