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Troubleshooting
Before starting any troubleshooting procedures, perform
the following procedure.
1. Relieve pressure. See Pressure Relief Procedure,
page 33.
2. Disconnect AC power from the machine.
Problem
Display Module completely dark
No or incorrect amount of material
dispensed from either side.
Piston stalled
Significant material leaking from
pump rear seal
Material dispensed not correct vol-
ume
334135B
3. Allow the machine to cool if the machine has a heat
Try the recommended solutions in the order given for
each problem to avoid unnecessary repairs. Verify all
circuit breakers, switches, and controls are properly set
and wiring is correct.
Cause
No power
Loose connection
Bad display module
Tank empty
Tank clogged
Air in material
Check valve malfunction
Piston worn or broken
Input air reduced or removed
Mixer blocked
Open Dispense Valve (ODV) adjust-
ment too late
Blocked check valve
Air cylinder failure
Pump shaft worn and/or shaft seal
worn
Machine air pressure has changed
since calibration.
Not enough material in one or more
tanks
Mixer has slight obstruction
Check valve malfunction
Piston worn or broken
control option.
Verify cable is plugged in.
Verify rear AC Power switch is ON.
Tighten all cables on Display Module.
Replace Display Module.
Fill tank with material.
Verify no obstruction in the tank.
Prime the machine until the air is
removed.
Remove; clean or replace check
valve.
Remove and replace piston if worn.
Reconnect input air line to machine.
Increase air pressure regulator
adjustment.
Replace static mixer.
Readjust the ODV setting to occur
sooner.
Remove check valve; clean and
replace.
Remove air cylinder and reinstall air
cylinder parts as necessary.
Remove pump shaft assembly, and
reinstall rear pump rebuild kit.
Readjust air pressure regulator to
value used when machine was cali-
brated, or recalibrate machine.
Check tank levels; fill and prime as
necessary.
Replace static mixer. Prime machine.
Remove check valve; clean or
replace as necessary.
Replace piston.
Troubleshooting
Solution
37
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