Graco 24T918 Instruction Manual page 49

Problem Cause
Unable to The InvisiPac system
achieve pub- monitors temperature
lished melt rate within aluminum mass
at the desired of melter (202). As melt
adhesive tem- rates exceed 20 lb/hr a
perature. system temperature
offset may be required.
ADM not dis- Main power circuit
playing when breaker off or power
system turned cord unplugged.
on
Cable on ADM
unplugged.
Connector on AWB
board not plugged in.
Bad 24VDC power sup-
ply.
ADM defective.
Main breaker Wrong setting in ADM
tripping breaker setup.
Internal short to ground
in system.
Too small of a circuit
breaker in main power
panel.
333347F
Solution
1. If the cycle rate is below (11 cpm - HM25, 22 cpm - HM50) and the
system is still running away increase the InvisiPac system
temperature in small increments over the current set point, leave
hoses and applicators at desired set point.
2. If the pump continues to runaway or dive continue increasing tem-
perature in small increments. Do not exceed maximum temperature
for the material being dispensed.
NOTE: A 50 amp breaker is required in order to maximize startup and
flow rate performance. Set the breaker size used in the Setup screens.
NOTE: Some materials are more difficult to melt than others, therefore
it may be impossible to process them at the published melt rate. The
InvisiPac system was tested to achieve continuous the published melt
rates when dispensing standard EVA packaging grade adhesives in
pellet form with an InvisiPac system temperature of 350°F and hose
and applicator temperatures of 350°F.
Turn main circuit breaker on or plug in power cord.
Reconnect ADM cable.
ADM cable should be plugged into J9 of the AWB board.
Check output on power supply should measure 24VDC, if no voltage
reading replace power supply.
Replace ADM.
Wrong breaker setting on ADM in the breaker setting in the setup
screen.
Unplug or disconnect power and measure between each leg of the
power to ground. There should be an open resistance reading.
Consult qualified electrician for proper size circuit breaker.
Troubleshooting
49