Guardian Technologies 4759 Test 69 Check Battery Charger Wiring, Test 70 Check Engine RUN Winding

DC CONTROL

PART 4

SECTION 4.4

DIAGNOSTIC TESTS

Figure 34. C2 Connector Pin Locations (Male Side)

4.Connect one test lead to Connector C2 Pin Location 1 (Wire 77). Connect the other test lead to the end of Wire 77 which was previously removed from the BCR. CONTINUITY should be measured.

5.Connect one test lead to Connector C2 Pin Location 2 (Wire 66). Connect the other test lead to the end of Wire 66 which was previously removed from the BCR. CONTINUITY should be measured.

RESULTS:

If CONTINUITY was NOT measured in Step 4 or Step 5, repair or replace defective wiring between Connector C2 and the battery charge relay.

TEST 69 - CHECK BATTERY CHARGER

WIRING

DISCUSSION:

The three pin connector on the battery charger connects the charger to ground and to battery power.

PROCEDURE:

1.Set the AUTO-OFF-MANUAL switch to OFF.

2.Disconnect the three pin connector from the battery charger.

3.Set a VOM to measure resistance.

4.Connect one meter test lead to Wire 13A at the three pin connector. Connect the other test lead to Wire 13A at Fuse F2. CONTINUITY should be measured.

5.Connect one meter test lead to Wire 0 at the three pin connector. Connect the other test lead to the ground terminal. CONTINUITY should be measured.

RESULTS:

1.If CONTINUITY was NOT measured in Step 4, repair or replace Wire 13A between the battery charger and fuse F2.

2.If CONTINUITY was NOT measured in Step 5, repair or replace Wire 0 between the battery charger and frame ground.

TEST 70 - CHECK ENGINE RUN WINDING

DISCUSSION:

The engine run winding provides an AC input through Wire 66A to the circuit board. This input is used for overspeed sensing. If the input is not received by the circuit board, immediate shutdown will occur.

PROCEDURE:

1.Set the AUTO-OFF-MANUAL switch to OFF.

2.Set a VOM to measure resistance.

3.Disconnect Connector C2 from the side of the control panel.

4.Disconnect Connector J1 from the circuit board.

5.Connect one meter test lead to Connector C2 Pin Location 3 (Wire 66A). Connect the other test lead to Connector J1 Pin Location 8 (Wire 66A). CONTINUITY should be measured.

6.Connect one test lead to Connector C2 Pin Location 4 (Wire 55). Connect the other test lead to a clean frame ground. CONTINUITY should be measured.

7.Re-connect connector C2 to the control panel, and re- connect connector J1 to the circuit board.

8.Set a VOM to measure AC Voltage.

9.Connect the positive meter test lead to Pin Location 8, Wire 66A of the J1 Connector on the circuit board. Connect the negative meter test lead to the ground terminal. Set the AUTO-OFF-MANUAL switch to MANUAL. When the generator starts observe the voltage output on the VOM. AC voltage should be 8-12 VAC.

10.Set VOM to measure frequency. 62- 63 HZ should be measured.

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