Guardian Technologies 5308, 4582 & 4987, 4583 Test 6 Wire Continuity, Test 7 Check Field Boost

Section 6

DIAGNOSTIC TESTS

86	15B	167	BLK	12.00
0	229	83	BLK
TERMINAL			TR2
BLOCK			TR1
(TB1)
	Figure 6-5. – Testing Wire 15B

86	15B 167	BLK	00.00
0	229	83	BLK

TB1	TR2
	TR1

J2-1J2-12

Test 6 - Wire Continuity

PROCEDURE:

1.Set a Voltmeter to measure resistance.

2.Remove the six pin connector from the Voltage Regulator.

3.Connect one meter test lead to Wire 0 in the six pin connector previously removed from the Voltage Regulator. See Figure 6- 11. Be careful not to damage the pin connectors with the test leads.

3.Connect the other test lead to the ground terminal in the control panel. The meter should read continuity.

4.Connect one meter test lead to Wire 162 in the six pin connec- tor previously removed from the Voltage Regulator. See Figure 6-11. Be careful not to damage the pin connectors with the test leads.

5.Remove Wire 162 from the Excitation Circuit Breaker (CB1). Connect the other meter test lead to Wire 162. The meter should read continuity.

Results:

If continuity was NOT measured across each wire, repair or replace the wires as needed. If continuity WAS measured refer back to flow chart.

Test 7 - Check Field Boost

PROCEDURE:

1.	Set VOM to measure DC voltage.
2.	Disconnect the six pin connector from the Voltage Regulator.
3.	Disconnect Connector C1. See Page 17 for connector location.

J2 HARNESS CONNECTOR

MAKE SURE THE TEST PROBE CONNECTOR IS MAKING CONTACT WITH THE CONNECTOR. DOUBLE CHECK TO MAKE SURE THAT THE TIP IS SHARP.

4.	Disconnect Wire 16 from the Starter Contactor Relay (SCR).
	See Figure 6-13. This will cause the unit not to crank when
	placed in the Start position.
5.	Connect the positive meter test lead to Wire 4 at the diode
	(D1), Wire 4 is soldered to the diode. See Figure 6-14. Connect
	the negative meter test lead to the ground terminal.
6.	Set the Start-Run-Stop Switch (SW1) to START. Measure the
	DC voltage. It should read approximately 12 VDC.

Figure 6-6. – Testing J2-1

RESULTS:

1.If the stepper motor fails any part of Step 5 replace the stepper motor.

2.If Step 7 fails repair or replace Wire 15B between the Start- Run-Stop Relay (SSR) and Terminal Block TB1.

3.If the stepper motor passes all steps replace the Printed Circuit Board.

7. Reconnect the Six Pin connector to the Voltage Regulator,

Reconnect the C1 connector, and reconnect Wire 16 to the

Starter Contactor Relay.

Results:

1.If 12 VDC was measured in Step 5 the field boost circuit is working refer back to the flow chart.

2.If field boost voltage was not measured refer back to the flow chart.

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