Troubleshooting
3A2347ZAA 49
System indi-
cates no errors
and correct
temperature
however mani-
fold and gun
are over the
temperature
setpoint
Incorrect RTD setting in
system.
1. Verify melter, hose, and manifold temperatures are all with in the
same range of the room ambient.
2. If the manifold temperature is either much higher or much lower than
the melter temperature then the RTD setting is not correct for the
RTD being used. Select correct RTD setting in the setup screen sys-
tem 2 before beginning.
NOTE: Failure to have the correct RTD value will cause the manifold
and gun to either under-heat or over-heat. Setting for RTD in the ADM
screens is lower than actual RTD value. Consult manufacturer for
actual RTD value.
No adhesive or
incorrect
amount of
adhesive out-
put when all
valves are trig-
gered
Plugged gun manifold
filter.
Replace manifold filter. Graco manifold filter in bottom of manifold or
inline filter on other manifolds.
Clogged hose. Flush or replace hose.
Solenoid valve. Check that correct voltage is input into valve solenoid. If voltage is cor-
rect, replace solenoid.
No signal from control
to solenoid.
If no voltage is present at solenoid, check control cable and remote
control device. Replace component.
Solenoid mufflers
plugged.
Replace solenoid mufflers.
No air to air solenoid. Re-establish air supply to solenoid.
Plugged system outlet
filter.
Replace Outlet Filter. See page 37.
If multiple valves are
triggered simultane-
ously, maximum pump
rate may be exceeded.
Stagger valve opening to reduce the maximum required flow rate to
below maximum pump rate.
Problem Cause Solution
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