Graco Inc 300E What To Check, What To Do, Type Of Problem, If check is OK, go to next check

			Repair / Réparation / Reparación
	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	Check transducer or transducer	1.	Set sprayer to OFF and disconnect power to sprayer.
	connections (control board is not
Digital display shows E=03		2.	Check transducer and connections to control board.
	detecting a pressure signal).
		3.	Disconnect transducer from control board socket.
			Check to see if transducer and control board
			contacts are clean and secure.
Control board status light blinks		4.	Reconnect transducer to control board socket.
3 times repeatedly
			Connect power, set sprayer ON and control knob
			to 1/2 turn clockwise. If sprayer does not run,
			set sprayer to OFF and go to next step.
		5.	Connect a confirmed working transducer to control
			board socket.
		6.	Set sprayer ON and control knob to 1/2 turn
			clockwise. If sprayer runs, install new transducer.
			Replace control board if sprayer does not run.
		7.	Check transducer resistance with ohmmeter (less
			than 9k ohm between red and black wires and 3-6k
			ohm between green and yellow wires).

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