Troubleshooting - Graco G3 Instructions Manual

Troubleshooting

Troubleshooting
Problem
Unit does not power on
Unit does not power on (DC models
only)
Unit does not power on (AC models
only)
Lubricant leaks past seal located on
the bottom of the reservoir
Unit not pumping during ON cycle,
but external controller functions
Follower plate is not going down
Pump takes several minutes before it
begins pumping at the highest pump
volume setting (no stroke adjust
spacers installed)
In an Injector System without sensor
feedback, unit does not vent prop-
erly
After wiring and installing equipment,
pump is not working (DC models
only)
30
Cause
Incorrect/loose wiring
Tripped external fuse due to internal
component failure
Tripped external fuse due to pump-
ing non-cold weather lubricant in
cold weather -13°F (-25°C)
Tripped internal power supply fuse
due to power supply failure
Reservoir retaining tabs are cracked
or broken
Reservoir is being pressurized during
filling
Failed motor
Air is trapped in the reservoir
between the follower plate and lubri-
cant
Pumping non-cold weather lubricant
in cold weather -13°F (-25°C)
Vent valve time needs to be config-
ured
Pump wired backwards
Solution
Refer to Installation instructions,
page 9.
Contact Graco Customer Service.
Replace lubricant with pumpable
lubricant, rated for environmental
conditions and application.
Replace fuse.
Contact Graco Customer Service.
Replace reservoir.
Ensure vent hole is not plugged.
If problem persists, contact Graco
Customer Service or your local
Graco distributor for assistance.
Replace unit.
Add grease following Load Pump
with Grease instructions, page 20.
Ensure air is purged.
Add 1 stroke adjust spacer and
adjust lube cycle time to accommo-
date the difference in pump volume
per stroke.
Adjust external vent valve control
time.
Rewire pump. See Wire and Instal-
lation Diagrams, page 14
332291P