Troubleshooting 6-7Part 237478_03 2012 Nordson CorporationDiagnostic Operational ChecksNOTE: This procedure is used to check for a clogged nozzle or a no‐flowcondition on H‐200 adjustable and CF‐200 wide pattern modules only. It isnot for use with reduced cavity modules. Refer to Table6‐1, TroubleshootingGuide, for other adhesive no‐flow fault conditions.Nozzle Operational Check1. Relieve hydraulic pressure. Refer to the Relieving Hydraulic Pressureprocedure in Section3, Installation.2. Ensure that the gun trigger safety is in the LOCKED position.CAUTION: Take care not to drop swirl nozzles when removing the retainingnut. Damage from dropping can cause the nozzle to produce an abnormalpattern.3. Loosen the nozzle retaining nut with a wrench, then remove the nozzleand retaining nut with a gloved hand.Figure 6‐3 Removing the Nozzle4. Trigger the gun.5. Slowly increase hydraulic and pneumatic pressure. Adhesive flows: nozzle clogged. Clean or replace. No adhesive flows: module or service block may be clogged. Returnto Table6‐1, Troubleshooting Guide, and review no‐flow faultconditions.
