Troubleshooting - Graco ToughTek MP Series Operation

Troubleshooting

Troubleshooting
Problem
The rotor/stator pump oper-
ates, but output is low
Pump does not operate
Pump is noisy when pumping
22
Cause
Pump pressure is too low, stator
is too loose.
Pump pressure is too high, stator
is too tight.
Stator is worn or damaged.
Rotor is worn or damaged.
Material hose is clogged.
Large pressure drop in material
hose.
Stator sleeve is too tight.
VFD overload fault.
Material hose is obstructed.
Dried material in pump assembly. Clean or replace the pump assembly.
Pumping water without dish soap
or a slick agent.
Pump is running with no material
or fluid in the hopper.
Solution
Tighten stator to achieve suitable pumping
pressure.
Loosen stator to achieve suitable pumping
pressure.
Tighten stator. If low output continues, replace
stator.
Tighten stator. If low output continues, replace
stator.
Clean or replace the material hose.
Reduce hose length and/or increase
diameter.
Evenly loosen the stator bolts to reduce pres-
sure. If the pump still does not operate when
bolts are loose, engage the jacking screw (JS)
to further open the stator sleeve. This should
reduce pressure enough to allow the pump to
run. Once running, re-tighten the stator bolts
to achieve appropriate pump pressure.
JS
Turn power disconnect switch to OFF and wait
one minute for VFD to reset. See "VFD over-
load fault," below, for possible causes.
Clean or replace the hose.
Add dish soap or a slicking agent to the water
Add material to hopper or shut off pump.
3A4789E