ITW Dynatec
D SERIES V6 DCL ASU Manuals
Troubleshooting Page 7-33
Revised 10/14
Problem Possible Cause
Pump doesn’t operate 1. Parent machine is not
in “Auto” mode, running.
hopper is at Ready
condition. 2. “Auto” motor is set at
zero (at controller keypad).
3. No incoming line
following signal.
Pump runs but there is 1. ASU is out of adhesive.
no adhesive output.
2. If pump has been serviced
and leads reversed, pump
will run backwards with
no output.
Low or inconsistent 1. Filter(s) clogged.
adhesive output.
2. Adhesive used is too
viscous.
3. Clogged hose.
4. Clogged applicators.
5. The fixed pressure relief
valve is opening.
Solution
1. Check parent machine.
2. Re-program pump.
3. Check for presence of 0 to 10 VDC
control signal at LINE and COMMON
terminals on V6 Base module. If signal
is not present, check connection at
tachometer drive connections. If control
signal is present there, the problem is
within the ASU.
1. Add adhesive to hopper.
2. Check pump wiring to schematic.
1. Remove and inspect filter basket
and primary filter.
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.
5. When fully closed (clockwise) and
all applicators are off, adhesive
pressure should be around 68 bar
(1000 psi). If it is significantly less,
the pressure relief valve should be
replaced.
Filter Basket
Primary Filter
Pressure
relief valve
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