Graco ti25442a manual Troubleshooting, Problem, Cause, Solution, 334666B

Troubleshooting

Troubleshooting

Problem	Cause	Solution
The pot will not properly	The air supply is inadequate.	Make sure the air inlet pressure gauge
pressurize.		reads 100-125 psi. If the gauge does
		not read 100–125 psi, check the air
		compressor for proper setup.
	The Emergency Stop is engaged.	Disengage the Emergency Stop.
	Inadequate water supply to the	Make sure the water tank is full and the
	pump.	inlet ball valve is open.
	The pot pressure regulator is set	Increase the setting on pot pressure
	too low.	regulator.
	The pot bung cannot seal properly.	Clean all abrasive from the bung and
		seal. Make sure the bung spring is lifting
		and the bung is firmly against the seal. If
		cleaning does not solve issue, replace
		bung seal.
	The Auto-Vent valve will not seal.	See Cleaning the Auto-Vent Valve, page
		31.
	The pot pressure relief valve is	Decrease the pot pressure to 145 psi
	discharging water.	(10.3 bar, 1.03 MPa) or less. If the valve
		weeps or relieves at 145 psi, replace
		valve (Kit 17D785).
	The pot or pump is leaking	Make sure the abrasive ball valve and the
	pressure.	dump valve are closed. If pot pressure
		gauge still creeps downward. See
		Checking for Leaks, page 26.
	The pot pressure regulator is	Replace the pot pressure regulator
	malfunctioning.	assembly (17C132).
The blast pressure will not	The air supply is inadequate.	Make sure the air inlet pressure gauge
reach the desired set point.		reads 100-125 psi. If the gauge does
		not read 100–125 psi, check the air
		compressor for proper setup.
	The main air regulator is	See Repairing the Main Air Regulator,
	malfunctioning.	page 28 (EQ600 – Kit 17C131, EQ300
		– Kit 17C129).
	The blast air regulator is	Replace the blast air regulator (Kit
	malfunctioning.	17C625).

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