AG900+ and AG900+S Applicators Customer Product Manual.pdf - 第22页

AG − 900+ and AG900+S Applicators 18 Part 1098464A  2009 Nordson Corporation Troubleshooting W ARNING! Allow only personnel with appropriate training and experience to operate or service the equipment. The use of untrai…

AG−900+ and AG900+S Applicators

 2009 Nordson Corporation

Part 1098464A

Maintenance

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! Halogenated hydrocarbon solvents are dangerous when used to

clean components in a pressurized fluid system. The use of halogenated

hydrocarbons in the system could result in an explosion. Refer to Safety.

CAUTION! Never heat system components with a torch or an open flame. Use

an electric oven with forced air circulation or a flameless electric heat applicator.

Do not heat plastic parts above 230 C (450 F).

To keep the AG-900+/AG900+S applicator operating efficiently, follow a preventive

maintenance schedule. Refer to Table 3.

Maintenance Schedule

Table 2: AG-900+ Applicator Maintenance

Interval Activity

Daily Keep the unit free of dust.

Monthly Inspect all hydraulic, pneumatic, and electrical connections, nozzle,

and all other exterior parts. Repair, replace, and clean these parts

as necessary. Inspect hoses for kinks, fraying, and cuts. Replace

hoses, if necessary. Check for air leaks. If found, inspect all joints

and connections using a leak detector fluid. Refer to Parts for

ordering information. NOTE: Thoroughly wet any area using a leak

detector fluid and give sufficient time to detect bubbles.

Every 6 Months Rebuild or replace the regulator (if used).

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.