Symptom
Probable Cause
Corrective Action
Vacuum does not start.
No power to vacuum.
Ensure that 120 or 240 volts is being supplied at
the junction box in the vacuum, depending on the
power requirements of your model.
Fuse or fuses blown.
Check and replace fuses to the vacuum motors.
See Symptom
Vacuum motor fuses or fuses blown
for further action.
Switch settings on timer are not set correctly
(VS0 coin-operated or pushbutton operated
models).
See section 2.1 or 2.2 to ensure that the timer is
settings are correct.
Stop button stuck in depressed position
(pushbutton models)
Repair or replace stop button.
Vacuum does not stop.
Switch settings on timer are not set correctly
(VS0 coin-operated or pushbutton operated
models).
See section 2.1 or 2.2 to ensure that the timer is
settings are correct.
Timer or relay may not be working correctly.
Verify operation of timer or relay to ensure that it is
shutting off vacuum motors.
Circuit breaker trips.
Electrical supply, including breaker and wire size,
may not be sufficient to operate the electrical
requirements of the vacuum and any other
devices that may be operating on this same
circuit.
Contact a certified electrician to check and ensure
that breaker and wire size are sufficient for the
vacuum and any other devices operating on the
same circuit.
Vacuum motor fuse or
fuses blown.
Motor brushes may be bad or shorted.
To confirm the problem is with one or more
motors, use a clamp meter to measure the current
draw of the motor(s). If the current draw exceeds
the specifications of the motor(s) then replace the
motor(s) or motor brushes.
No or low suction.
Hose cut or clogged with debris.
Check hose for cuts or debris and repair or
replace as necessary.
Filter bags clogged.
Check filter bags and clean.
One or both of the motors may not be functioning
properly.
Check motor fuses. If fuse is blown see Symptom
Vacuum motor fuses or fuses blown
for further
action.
Clean out doors not closed tightly with latch.
Ensure that latch is holding doors closed tightly.
Latch can be adjusted if required.
Clean out door gaskets or motor gaskets worn.
Replace leaking gaskets. Ensure that motors are
held down securely by bracket or springs.
4.0 TROUBLESHOOTING