Graco Inc ti14916a, 3A0243A important safety instructions Control Board Malfunction Steps

Troubleshooting

Control Board Malfunction (Steps)

	STEP 1.
BEEP	Turn engine
	OFF and set
	meter to
	continuity.

-

	ti14938a
+	Pump
	On/Off
-	Switch

To Ground

3900

To Engine

5900/7900

On/Off Switch

WatchDog

		STEP 2.				10-12 DC
	12 -20 AC	Turn engine
		ON. Set meter				V
	V	to AC volts and
						-
		connect wires
	-
		to control			ti14940a
ti14939a		board.
		Control				+
	-	Board		+		+
						Control
		J2	J1
Engine						Board
Generator
				To Clutch
				Field	Pinion	Drive
				+	Assembly	Housing
			Clutch Test Points
				J10
				LED
				D12
J2	J1
	Control
	Board				ti14943a
J3	J4			J5
				J9

Transducer

Premium Display Board

STEP 3.

Leave engine running and turn switch ON. Turn potentiometer to high and set meter to DC volts.

Clutch

Field

ti14942a

-

Control

Board

1-3 ohms

-

+

-+

STEP 4.

Turn engine OFF and unplug clutch wires. Set meter to Ohms.

Clutch

Field

Potentiometer

STEP 5.
Turn engine	Control
ON and turn	Board
switch ON.

J5

ti14941a

Clutch Test Points

3A0243A 9