Page 7-14
Revised 1/05
ITW Dynatec c. 2004
DYNAMINI ASU Manual #20-25
Problem
Possible Cause
Pump doesn’t operate.
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.
Pump runs but there is
1. ASU is out of adhesive.
no adhesive output.
2. If pump has been serviced
and motor leads reversed,
pump will run with no
output.
Low or inconsistent
1. Filter(s) clogged.
adhesive output.
2. Adhesive used is too
viscous.
3. Clogged hose.
4. Clogged applicators.
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.
WARNING
HOT SURFACE & ADHESIVE
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.
Gear Pump Troubleshooting Guide
Output
filter
Output Manifold
Hopper screen
