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
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
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
3.Using the chart below ohm out the
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
3.Remove both Wire 0 from the
4.Remove Wire 0 from the
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