Graco 334135B important safety instructions Troubleshooting, Problem Cause Solution

Troubleshooting

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.

3.Allow the machine to cool if the machine has a heat control option.

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.

Problem	Cause	Solution
Display Module completely dark	No power	Verify cable is plugged in.
		Verify rear AC Power switch is ON.
	Loose connection	Tighten all cables on Display Module.
	Bad display module	Replace Display Module.
No or incorrect amount of material	Tank empty	Fill tank with material.
dispensed from either side.
	Tank clogged	Verify no obstruction in the tank.
	Air in material	Prime the machine until the air is
		removed.
	Check valve malfunction	Remove; clean or replace check
		valve.
	Piston worn or broken	Remove and replace piston if worn.
Piston stalled	Input air reduced or removed	Reconnect input air line to machine.
		Increase air pressure regulator
		adjustment.
	Mixer blocked	Replace static mixer.
	Open Dispense Valve (ODV) adjust-	Readjust the ODV setting to occur
	ment too late	sooner.
	Blocked check valve	Remove check valve; clean and
		replace.
	Air cylinder failure	Remove air cylinder and reinstall air
		cylinder parts as necessary.
Significant material leaking from	Pump shaft worn and/or shaft seal	Remove pump shaft assembly, and
pump rear seal	worn	reinstall rear pump rebuild kit.
Material dispensed not correct vol-	Machine air pressure has changed	Readjust air pressure regulator to
ume	since calibration.	value used when machine was cali-
		brated, or recalibrate machine.
	Not enough material in one or more	Check tank levels; fill and prime as
	tanks	necessary.
	Mixer has slight obstruction	Replace static mixer. Prime machine.
	Check valve malfunction	Remove check valve; clean or
		replace as necessary.
	Piston worn or broken	Replace piston.

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