Gear Pump Troubleshooting Guide - ITW Dynatec DYNAMINI Operation And Service Manual

Page 7-14
Revised 1/05

Gear Pump Troubleshooting Guide

Some of the procedures in the following Troubleshooting Guide require working
near hot adhesive. Be sure to wear protective gloves, safety glasses and clothing
and use proper tools for handling hot melt components.
Problem
Pump doesn't operate.
Pump runs but there is
no adhesive output.
Low or inconsistent
adhesive output.
Hopper screen
Output
filter
Output Manifold
WARNING
HOT SURFACE & ADHESIVE
Possible Cause
1. Motor on/off is off at the
controller keypad.
2. Hopper temperature is
below setpoint window.
3. No incoming electrical
power.
4. System is not ready.
1. ASU is out of adhesive.
2. If pump has been serviced
and motor leads reversed,
pump will run with no
output.
1. Filter(s) clogged.
2. Adhesive used is too
viscous.
3. Clogged hose.
4. Clogged applicators.
ITW Dynatec c. 2004
DYNAMINI ASU Manual #20-25
Solution
1. Check keypad switch.
2. Pump cannot operate until hopper has
reached ready condition. Verify that
hopper has reached ready. Re-program
hopper operating setpoint and tolerance
(hi/low) if necessary.
3. Check to see if ASU temperature
control is operating. If not, check
for presence of incoming supply
voltage.
4. Wait until temperature scale (F/C) light
is steady ON (not flashing).
1. Add adhesive to hopper.
2. Check motor wiring to schematic.
1. Remove and inspect filter basket and
hopper screen.
2. Verify that system components are
at appropriate temperatures and that
the selected adhesive is correct for
the application.
3. Inspect hose for kinks or internal
plugs of debris or char. Clean or
replace hoses as necessary.
4. Inspect applicators for plugged
nozzles or filters. Clean or repair
applicators as necessary.