Graco Inc 310645K manual Troubleshooting, Pressure Relief, Problem Cause Solution

		Troubleshooting
	Troubleshooting
Pressure Relief, page 7
Problem	Cause	Solution
Sprayer won’t run or stops intermit-	Power switch not on	Turn switch on.
tently
	No power at wall outlet	Check outlet by plugging in another
		appliance. If appliance does not
		work, try another outlet.
	Wrong size generator	Use a 7500 watt or larger generator.
		Refer to Generator Requirements,
		page 8.
	Temperature too cold	Allow unit to warm up.
	Too many items on same circuit	Unplug other items from circuit.
	Internal thermal switch tripped	Self-resetting. Allow unit to cool down
		15 minutes and restart. Usually
		occurs when wrong size extension
		cord is used.
	Extension cord too long or wrong	Use a 12 gage extension cord or
	gauge	remove extension cord. Refer to
		Grounding and Electric Require-
		ments, page 7.
	Breaker tripped	Reset breaker.
Pump won’t pump material or low	Air lock	Open air valve on gun.
output
	Mix too thick	Add water to thin material. Use Mate-
		rial Thickness Gauge.
	Loose fittings	Check and retighten all fittings.
	Plugged gun	Relieve Pressure, page 7. Remove
		gun from hose. Clean gun.
	RotoFlex HD Pump worn out	Replace hose.
	Pump cold or material frozen in pump	Move pump to warm room and allow
		it to warm up or run hot water through
		sprayer.
	Sensor is bad	Replace, page 26
	Check air system for leaks	Remove shroud and examine for air
		leaks
	Loose wire	Remove shroud and examine wiring
	No air pressure	Rebuild compressor
Soft start won’t work/pump, always	Sensor is bad	Change sensor, page 26
loaded
	Air leak due to bad seal keeps valve	Replace seal
	open
	Normal soft start system delay	Release trigger for 10-15 seconds.
		Retry.
	Switch is not operating properly	Replace switch
	Damaged solenoid valve on cylinder	Check gun supply, hose and sprayer
		for leaks
	AIr leak

310645K 27