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31 P/N 1048257_03  2018 Nordson Corporation PatternPro Edition 02/18 Troubleshooting WARNING: Risk of personal injury. This equipment contains pressurized hot melt material and high voltage circuits. Read the Safety inf…

P/N 1048257_03

 2018 Nordson Corporation

PatternPro

Edition 02/18

Inspect the Applicator Wiring

For details on inspecting the applicator wiring, refer to Replacing the RTD or

Heater in Repair.

P/N 1048257_03

 2018 Nordson Corporation

PatternPro

Edition 02/18

Troubleshooting

WARNING: Risk of personal injury. This equipment contains pressurized hot

melt material and high voltage circuits. Read the Safety information provided

in this document before completing any troubleshooting procedure. Failure to

observe safety messages and hazard‐avoidance procedures can result in

personal injury, including death.

Troubleshooting Table

The following table lists the applicator problems that are most likely to occur,

the possible causes of each problem, and steps for corrective action. Where

applicable, cross‐references are made to expanded diagnostic

procedures(DPs) provided later in this section or to other sections of this

manual.

Table 5 Troublehooting Table

Problem Possible Cause Corrective Action

1. No adhesive flow

from a single

applicator module

or from any module

on a multi‐module

applicator

Adhesive level low Add adhesive.

No input power Connect power to the melter and auxiliary

devices. Ensure that all disconnect switches or

circuit breakers are on.

Melter, hose, or applicator

temperature setting too low

Adjust the setting. Refer to the melter manual.

System not at operating

temperature

Verify that the READY light is on and the hot

melt material is molten.

Insufficient air pressure to

melter piston pump (piston

pump melters)

Flush the melter filter. Refer to the melter

manual.

Melter motor not operating

(gear pump melters)

Check the motor operation. Refer to the melter

manual.

No air supply to solenoid valve Check the plant air supply pressure.

Solenoid valve failed Check the solenoid valve and replace if

necessary. Refer to DP1.

Hose clogged Replace the hose.

Nozzle clogged Check the nozzle. Refer to DP2.

P/N 1048257_03

 2018 Nordson Corporation

PatternPro

Edition 02/18

Troubleshooting Table (contd)

Table 5 Troublehooting Table

(contd)

Problem Possible Cause Corrective Action

1. No adhesive flow

from a single‐ module

applicator or from any

module of a

multi‐module

applicator

(contd.)

Adhesive in air section of

module

Replace the O‐rings. Refer to Replacing the

Rotating Disk and applicator Module in Repair.

Module failed Replace the module. Refer to Replacing the

Rotating Disk and applicator Module in Repair.

Dirty or faulty triggering device Clean or replace the triggering device. Refer to

DP1.

Faulty encoder Test the encoder and replace if defective.

2. No adhesive flow

from some modules

in a multi‐module

applicator

Nozzle clogged Check the nozzle. Refer to DP2.

Module failed Replace the module. Refer to Replacing the

Rotating Disk and applicator Module in Repair.

3. Uncontrolled

adhesive flow from

module

Hydraulic pressure too high Decrease the system hydraulic pressure.

Hydraulic pressure too high

and applicator air pressure

lost (MiniBlue ll applicator

only)

Stop the melter pump and restore the air

pressure to the applicator.

Module failed open Replace the module. Refer to Replacing the

Rotating Disk and applicator Module in Repair.

Solenoid valve ported to

applicator body backwards or

failed open

Correct the solenoid valve porting or replace

the solenoid valve. Refer to Connecting the

Solenoid Valve.

4. Adhesive leaking

out of the disk

cavity

Damaged O‐rings Replace the O‐ring. Refer to Replacing the

Rotating Disk and applicator Module in Repair.