Troubleshooting
These troubleshooting procedures cover only the
most common problems. If you cannot solve a
problem with the information given here, contact your
local Nordson
R
representative for help.
Problem
Possible Cause
Corrective Action
Meter will not cycle
Blocked material path
Ensure material is passing through all hoses.
Dispense valve not opening
Ensure air is on. Inspect dispense valve for binding.
Inspect dispense valve piston for binding. Inspect
dispense valve piston O-ring for wear or damage.
Ensure there is sufficient air pressure. Ensure dispense
valve solenoid is functioning properly.
Ensure stroke
adjustment bolt is not fully tightened.
Inlet/outlet valve not opening
Inspect valve for needle/ball binding. Inspect dispense
valve piston for binding. Inspect dispense valve piston
O
−
ring for wear or damage. Ensure there is sufficient air
pressure. Ensure solenoid valve is functioning properly.
Linear servo actuator not
cycling
Inspect the power and controller connections are
properly fastened. Be sure there is sufficient power to
cycle the linear servo actuator shaft. Reference the
linear servo actuator equipment literature provided with
this manual.
Pressure sensor reading low
pressure
Inspect pressure sensor calibration. Inspect position of
the pressure sensor to ensure the to ensure the part
was installed properly. Ensure the pressure sensor is
properly functioning. Be sure there are no leaks from the
seal cartridge assembly.
Seal cartridge assembly
malfunction
Inspect for sufficient supply pressure. Inspect metering
rod for binding. Inspect bearing for binding. Inspect
metering rod for wear and debris.
Supply equipment not cycling
Ensure there is sufficient air pressure. Reference supply
equipment literature.
Meter
l
eakage
Loose fitting
Isolate leak and tighten fitting.
Material metering portion
failure
Ensure all fittings and gauges are properly tightened.
S
eal failure
Tighten packing nut on pump. Ensure there is sufficient
lubricant in the wet cup. Replace seal(s), if necessary.
Valve seal failure
Replace seal (s). Replace or repair scored or damaged
needle, if necessary. Replace or repair scored or
damaged sealing face, if necessary.
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