Graco Inc 233700 Pressure Control Repair, Digital Display Messages, Sprayer, Indication, Action

Pressure Control Repair

Digital Display Messages

Relieve pressure before repair; page 5. No display does not mean that sprayer is not pressurized.

DISPLAY	SPRAYER	INDICATION		ACTION
	OPERATION
No Display	Sprayer may be pressurized.	Loss of power or display	Check power source. Relieve
		not connected	pressure before repair or dis-
			assembly. Verify display is
			connected.
	Sprayer may be pressurized.	Pressure less than	Increase pressure as needed
		200 psi (14 bar, 1.4 MPa)
psi	Sprayer is pressurized. Power is ap-	Normal operation	Spray
	plied. (Pressure varies with tip size and
bar	pressure control setting.)
MPa
	Sprayer stops. Engine is running.	Exceeded pressure limit	Remove any filter clogs or
			flow obstructions. Make sure
			gun trigger is locked open if
			using AutoClean valve.
	Sprayer stops. Engine is running.	Pressure transducer faulty,	Check transducer connections
		bad connection or broken	and wire. Replace transducer
		wire.	or control board, if necessary.
	Sprayer stops. Engine is running.	High clutch current	1. Check clutch 7–pin bulk-
				head connector. Clean
				contacts.
			2.	Measure 1.2 ±0.2Ω
				(GMax 3900); 1.7 ±0.2Ω
				(GMax 5900) across
				clutch field at 70_F
			3. Replace clutch field as-
				sembly
	Sprayer stops. Engine is running.	High clutch temperature	1. If clutch is new, let spray-
	Display alternates E=06.			er cool down and then re-
				start
			2.	Inspect clutch. Replace
				clutch if there is excessive
				wear.
			3. Remove pump pin, sepa-
				rate pinion housing from
				clutch housing. Rotate
				rotor clockwise to check
				for excessive drag.
	Sprayer stops. Engine is running.	Pressure greater than	1. Flush paint from hose be-
		2000 psi (138 bar, 14 MPa)		fore operating Flush Timer
		while in Flush Timer Mode		Mode
			2. Verify AutoClean is acti-
				vated and gun valve and
				prime valve are open

After a fault, follow these steps to restart sprayer:

1.Correct fault condition

2.Turn sprayer OFF

3.Turn sprayer ON

16 309409