Graco Inc 313314B, 300E Step, What To Check, What To Do, Type Of Problem

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	Control is commanding motor to run	1. Remove pump and try to run sprayer. If motor runs,
	but motor shaft does not rotate.		check for locked or frozen pump or drive train.
Digital display shows E=05
	Possibly locked rotor condition, an		If sprayer does not run, continue to step 2.
	open connection exists between	2.	Set sprayer to OFF and disconnect power to sprayer.
	motor and control, there is a
	problem with motor or control board,	3.	Disconnect motor connector(s) from control board
	or motor amp draw is excessive.
			socket(s). Check that motor connector and control
Control board status light blinks
	With prime valve open and pressure		board contacts are clean and secure. If contacts
5 times repeatedly
			are clean and secure, continue to step 4.
	relieved, start and stop motor 15
	times using set point potentiometer	4.	Set sprayer to OFF and spin motor fan 1/2 turn.
	(pressure switch). If motor restarts
			Restart sprayer. If sprayer runs, replace control
	each time at no load, motor may be
			board. If sprayer does not run, continue to step 5.
	bad and must be tested (see Step
	1). If motor will not restart every	5.	Perform Spin Test: Test at large 4-pin motor field
	time, board is at fault. Replace
			connector. Disconnect fluid pump from sprayer. Test
	circuit board.
			motor by placing a jumper across pins 1 & 2. Rotate
			motor fan at about 2 revolutions per second. A cogging
			resistance to motion should be felt at the fan.
			The motor should be replaced if no resistance is felt.
			Repeat for pin combinations 1 & 3 and 2 & 3. Pin 4
			(the green wire) is not used in this test. If all spin test
			is positive, continue to step 6.
				Green Blue Red Black
			STEP 1:
				Green Blue Red Black
			STEP 2:
				Green Blue Red Black
			STEP 3:

36 313314B