AG900+ and AG900+S Applicators Customer Product Manual.pdf - 第23页

AG − 900+ and AG900+S Applicators 19  2009 Nordson Corporation Part 1098464A Problem Possible Cause Corrective Action 3. Applicator or swivel fails to heat. Loose connections Disconnect and lock out power . Remove heate…

AG−900+ and AG900+S Applicators

Part 1098464A

 2009 Nordson Corporation

Troubleshooting

WARNING! Allow only personnel with appropriate training and

experience to operate or service the equipment. The use of

untrained or inexperienced personnel to operate or service the

equipment can result in injury, including death, to themselves and

others, and damage to the equipment.

This section contains troubleshooting procedures. These procedures cover only the most

common problems that may be encountered. If the problem cannot be solved with the

information given here, contact Nordson for help.

Table 3: Troubleshooting Table

Problem Possible Cause Corrective Action

1. Applicator fails to

trigger.

Needle adjusted fully closed Turn the needle adjustment

knob at least two turns

counterclockwise or trigger

the applicator.

Low air supply pressure Verify that triggering air

pressure is 4.14−6.89 bar

(60−100 psi).

Air leaking at spare air supply

port

Check air ports for leakage.

Seal any leaks with PTFE

tape.

Air leaking at applicator body

weep hole

Replace piston cartridge

assembly.

Needle piston seal damaged Replace seal cartridge

assembly.

2. Applicator fails to

shut off.

Foreign material in nozzle

needle seat

Remove and clean nozzle tip.

Damaged needle return

spring

Inspect and replace spring.

Damaged nozzle Replace nozzle/needle set.

Air supply to applicator not

shutting off

Troubleshoot air supply

pressure system.

Material pressure too high Connect air-close kit P/N

1096469.

Air-close air pressure too low.

AG−900+ and AG900+S Applicators

 2009 Nordson Corporation

Part 1098464A

Problem Possible Cause Corrective Action

3. Applicator or

swivel fails to

heat.

Loose connections Disconnect and lock out

power. Remove heater cover

and inspect wires. Restore

any loose connections.

Open or shorted heater Measure cold resistance

across the heater with a

VOM. 0 ohms means the

heater is shorted. Infinite

ohms means the heater is

open.

Open or shorted RTD Measure cold resistance

across the RTD with a VOM.

0 ohms means the RTD

shorted. Infinite ohms means

the RTD is open.

Short circuit in the cordset Measure cold resistance

between connector pins and

green ground lead in the

heater module. 0 or very low

resistance means the cordset

shorted. Replace cordset.

4. Bead is too large

or too small.

Dispense pressure set too

high or too low

Adjust material supply

pressure (if applicable).

Turn regulator adjustment

screw (if installed). If the

bead is still too large or too

small, replace the regulator

spring or adjust needle stroke.

5. Bead is

dispensed with a

hammerhead

(large to small).

Regulator operating outside of

normal pressure range

Turn regulator adjustment

screw counterclockwise. (If

applicable)

Worn regulator seat Rebuild regulator (If

applicable). Refer to the

Repair section.

AG−900+ and AG900+S Applicators

Part 1098464A

 2009 Nordson Corporation

Repair

WARNING! Allow only personnel with appropriate training and

experience to operate or service the equipment. The use of

untrained or inexperienced personnel to operate or service the

equipment can result in injury, including death, to themselves and

others, and damage to the equipment.

WARNING! Disconnect equipment from line voltage. Failure to observe

thiswarning may result in personal injury, death, or equipment damage.

This section provides procedures for replacing AG-900+/AG900+S parts.

Replace the Needle/Nozzle

Disassembly

To disassemble your applicator to replace the nozzle/needle assemblies, perform the

following procedure:

1. Heated applicators: disconnect and lock out input electrical power from the applicator.

NOTE: Do not remove the module from the regulator body or applicator adapter body

unless applicator location prohibits easy access.

2. If location requires the AG900+/AG900+S module to be removed from the regulator or

adapter block to access components, do so by removing the two socket head screws

from the front of the module and pulling it free.

NOTE: Module must be pulled straight away to avoid damage to locating dowel pins

on back face of module.