Troubleshooting
6-2
Part 1079832_04
E 2015 Nordson Corporation
Applicator Heating Problems
Refer to this troubleshooting table if the applicator does not heat, underheats,
or overheats.
NOTE: Each heated component in a hot melt system (typically the grid, the
reservoir, each hose, and each applicator) is referred to as a heated zone.
The applicator's heated zones are the adhesive manifold and the heated air
manifold. Some applicators may have multiple adhesive manifold and heated
air manifold zones.
WARNING! Risk of personal injury or death. Allow only qualified personnel to
perform electrical installation, troubleshooting, or repair procedures. Before
performing any electrical procedure, review Section 1, Safety, and
disconnect and lock out electrical power to the system.
Problem Possible Cause Corrective Action
1. Applicator does not
heat
System power not on Verify that the system power is turned
on.
Loose electrical connection Verify that all electrical connections
(cordsets and cables) at the melter
and the applicator ends of the hose
are secure.
Broken or missing electrical pins Check for broken or missing pins at
all electrical connections. Repair or
replace damaged components.
Adhesive or heated air manifold
temperature setpoints too low
Adjust the temperature setpoints as
necessary. Refer to the melter or
temperature controller manual.
2. Applicator underheats
or overheats
System in standby or setback
mode
Take the system out of standby or
setback mode.
Adhesive manifold, heated air
manifold, or hose temperature
setpoints too low or too high
Adjust the temperature setpoints as
necessary. Refer to the melter or
temperature controller manual.
Failed heater, sensor (RTD or
thermocouple), or cable
Check the heaters, sensors, and
cables for the problem zone. Refer to
the appropriate procedures in
Section 11, Electrical System.
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