Problem Solutions
Adhesive output too low
(Continued)
8. Adhesive formulations tend to be a factor in each
previously listed problems. Refer to Startup
Instructions (section 5.2), for cautionary notes.
System should be purged if formulation is incorrect.
Clean applicator nozzle or change to larger nozzle.
(Refer to section 9, Maintenance Tools.)
Adhesive output too high
1. Adjusting the flow control valve (F.C.V.) correctly
will produce the desired pumping performance of
your melt unit. (Refer to section 5.3.2 of this
manual.) If the F.C.V. is inoperable, replace or
repair it as specified in section 8.4. (Refer to
section 9 for pump kit information.)
2. Adjust the supply hose temperature controller
according to section 5.3 in this manual. Inadequate
supply hose heat can affect the performance of your
hot melt system. If problem persists, see Hose
Controller Replacement, section 8.2, and section 9
for hose temperature controller kits.
3. Adjust the tank temperature controller according to
section 5.3 of this manual. Inadequate tank
temperature can affect the performance of your hot
melt system. If the tank has reached an
overtemperature condition, try turning the controller
down. A failure of the solid state relay (closed
position) can cause the tank to reach over
temperature. Check the relay’s continuity – failure of
the relay is rare. If problem persists, replace the
faulty component (controller or relay). On units with
Standby, make sure Standby switch is disengaged
and in the Run position.
4. The pump motor is normally the last item to check
when troubleshooting. All motors have internal
thermal protection. Switch Off pump motor switch
and allow the motor to cool for approximately 20
minutes. Turn pump switch back On. If the motor
still fails to operate, continue troubleshooting.
Determine which pump motor is mounted in your
melt unit. (Refer to the motor I.D. plate.) Consult
factory for the properly rated pump motor for your
specific application.
© Copyright Astro Packaging 2009 KB30, KB50 and KB100 Series Hot Melt Units 19600-159 Rev. A 04/09/09 37
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