User Manual

Troubleshooting 35
7 Troubleshooting
7.1 Overview
To quickly identify problems, look for obvious signs such as burnt, missing, damaged, or loose parts, as
well as fluid obstructions and leakages. If a problem recurs, there may be other root causes. Table 7-1
through Table 7-3 facilitate troubleshooting based on symptom, set-up, and component. Refer to
Figure 9-1 to Figure 9-3 for part identification.
7.2 Safety First
Dispensing system operation involves heat, air pressure, fluid pressure, mechanical and pneumatic
devices, electrical power, and the use of hazardous materials. Refer to the Safety section of your
particular dispensing system manual prior to installing and operating your DJ-9500 Valve.
7.3 Troubleshooting the DJ-9500
 NOTE Refer to the Fluidmove User Guide for recovery procedures pertaining to Fluidmove.
Table 7-1 DJ-9500 Troubleshooting – Symptom Based
Symptom Possible Cause Recovery
No Fluid Jetted
Empty or Old (expired) fluid Replace fluid.
Clogged Nozzle Clean wetted components.
Air in fluid path Purge air through fluid path.
Fluid temperature too low/off
Verify heater is turned on and set at the
correct temperature. Verify electrical power
at the Jet connector. Verify proper Heater
element/RTD resistance.
Fluid pressure too low/off
Verify the proper air pressure is delivered
to the fluid syringe.
Solenoid not actuating
Manually actuate solenoid valve by
depressing the blue colored button on the
bottom of the solenoid. Verify electrical
signal to valve. Valve air pressure low or
off – set to proper value. Electrical cable or
pneumatic line damaged. Repair/replace.
Blocked pneumatic path
Check jet body. Remove stroke adjust
assembly, spring, button and needle
assembly.
Needle assembly not actuating
Stroke set to zero – set stroke to proper
value. Remove stroke adjust assembly,
remove fluid chamber, manually verify
needle assembly slides in the bearings.
Verify spring is installed. Valve air pressure
low or off – set to proper value. Valve
On/Off time set too low – set to proper
value (Minimums of 3ms ON and 3ms
OFF).
Stroke adjust was not properly
adjusted when first dispensed on
machine (Needle Hat Seal
inverted)
Remove stroke adjustment assembly and
needle. Reinstall using the proper tool.