Section 6

DIAGNOSTIC TESTS

Ground. 12 VDC should be measured. Reconnect Wire 13 to the SCR. If 12 VDC is NOT measured on Wire 13 Stop Testing and repair or replace Wire 13 between the Starter Contactor (SC) and the Starter Contactor Relay (SCR).

Note: Jumper leads may be used if necessary.

4.Set voltmeter to measure resistance.

5.Remove Wire 13, Wire 16, and Wire 17 from the Starter Contactor Relay (SCR)

6.Connect the meter leads across Terminal 87 and Terminal 30 of the SCR. See Figure 6-35.

1600.00

SCR

87

1586 87a 85

3017

13

Figure 6-35. – Starter Contactor Relay Test

7.Connect a jumper wire from Terminal 85 to ground. The relay should energize and the voltmeter should read continuity. See Figure 6-35.

8.Reconnect all Wires.

RESULTS:

If continuity was not measured in Step 7 replace the Starter Contactor Relay. If all steps passed refer back to flow chart.

TEST 27 - Check Start-Run-Stop Switch

(SW1)

PROCEDURE:

1.Set a voltmeter to measure resistance.

2.Remove all wires from the Start-Run-Stop Switch (SW1).

3.Using the chart below ohm out the Start-Run-Stop Switch. Connect one meter test lead to one terminal and the other meter test lead to the other terminal. With meter leads connected acti- vate the switch to Start, Stop or Run and follow the chart.

4.Reconnect all wires to the switch.

CONDITION

TERMINALS

 

 

RESULT

STOP

5,4

 

 

OPEN

STOP

5,6

 

 

CLOSED

STOP

2,1

 

 

OPEN

STOP

2,3

 

 

CLOSED

RUN

ALL CONDITIONS

 

OPEN

START

5,4

 

 

CLOSED

START

5,6

 

 

OPEN

START

2,1

 

 

CLOSED

START

2,3

 

 

OPEN

 

0

 

 

 

 

STOP

6

3

0

 

 

 

 

RUN

5

2

167

 

 

 

 

START

4

1

15

 

 

 

 

 

17

15

 

Figure 6-36.Start-Run-Stop Switch (SW1)

RESULTS:

If the switch fails any part of the test procedure replace the switch.

TEST 28 - Check Start-Run-Stop Switch

(SW1) Wiring

Procedure:

1.Set voltmeter to measure resistance.

2.Remove Wire 17 from the Starter Contactor Relay (SCR). Connect one meter test lead to Wire 17. Remove Wire 17 from the Start-Run-Stop Switch (SW1). Connect the other meter test lead to wire 17. Continuity should be measured.

3.Remove both Wire 0 from the Start-Run-Stop switch (SW1) it is located in two positions on the switch. Connect one meter test lead to one Wire 0 and connect the other meter test lead to the other Wire 0. Continuity should be measured.

4.Remove Wire 0 from the Start-Run-Stop switch (SW1) it is located in two positions on the switch. Connect one meter test lead to one Wire 0 and connect the other meter test lead to frame ground. Continuity should be measured.

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Guardian Technologies 4583, 5308 Test 27 Check Start-Run-Stop Switch SW1, Test 28 Check Start-Run-Stop Switch SW1 Wiring

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