Graco Inc 313314B, 300E Electrical Troubleshooting, If check is OK, go to next check

Repair / Réparation / Reparación

Electrical Troubleshooting

	WHAT TO CHECK	WHAT TO DO
TYPE OF PROBLEM	If check is OK, go to next check	When check is not OK, refer to this column
Sprayer does not run at all	See flow chart, page 40.
Digital display is blank
Control board status light never
lights
Sprayer does not run at all	See flow chart, page 40.
Digital display shows dashes
and psi icon is not blinking

Control board status light blinks	WatchDog Activated	Reset Watchdog
once when switch is turned on
but then stays off
Sprayer does not run at all	Check transducer or transducer	1.	Make sure there is no pressure in the system (see
	connections		Pressure Relief, page 15). Check fluid path for
Digital display shows E=02
			clogs, such as clogged filter.
		2.	Use airless paint spray hose with no metal braid
			1/4 in. x 50 ft minimum. Smaller hose or metal braid
			hose may result in high-pressure spikes.
Control board status light blinks		3.	Set sprayer to OFF and disconnect power to sprayer.
2 times repeatedly
		4.	Check transducer and connections to control board.
		5.	Disconnect transducer from control board socket.
			Check that transducer and control board contacts
			are clean and secure.
		6.	Reconnect transducer to control board socket.
			Connect power, set sprayer ON and control knob
			1/2 turn clockwise. If sprayer does not run properly,
			set sprayer to OFF and go to next step.
		7.	Install new transducer. Connect power, set sprayer
			ON and control knob 1/2 turn clockwise. Replace
			control board if sprayer does not run properly.

34 313314B