Generac Power Systems 20 kW LP, 10 kW LP, 13 kW NG, 7 kW NG, 9 kW NG Test 79 Test Exercise Function

Section 4.4

Diagnostic tests

Part 4

DC control

10.Connect one meter test lead to Wire 18 removed from the stud connector. Connect the other meter test lead to a clean frame ground. INFINITY should be measured. If CONTINUITY is measured, repair or replace Wire 18 between the stud connector and the J1 Connector.

Results:

Refer to flow chart.

Procedure: (Single Cylinder)

1.Set a VOM to measure resistance.

2.Remove Wire 18 from the in-line bullet connector. Disconnect the J1 Connector from the printed circuit board.

3.Verify the continuity of Wire 18. Connect one meter test lead to Wire 18 removed from the stud connector or bullet connector. Connect the other meter test lead to Pin Location J1-4. CONTINUITY should be measured. If CONTINUITY is not measured, repair or replace Wire 18 as needed.

Results:

Refer to flow chart.

Test 79 – Test Exercise Function

Discussion:

The following parameters must be met in order for the weekly exercise to occur:

• AUTO-OFF-MANUAL switch set to AUTO.

Procedure: 8kW

1.Set the AUTO-OFF-MANUAL switch to MANUAL. The generator should start. Set AUTO-OFF-MANUAL switch back to AUTO. Verify that AUTO-OFF-MANUAL switch has been in AUTO for weekly exercise to function.

2.Hold the Set Exercise switch until the generator starts (approximately 10 seconds) and then release. All of the red LEDs will flash for approximately 10 seconds and then stop. The generator will start and run for approximately 12 minutes and then shutdown on it’s own. The exerciser will then be set to start and run at that time of that day each week. If the unit does not start, replace the circuit board.

Procedure: 10kW-20kW

Note: Make a record of the date and time the generator is set to exercise.

1.Record the current date and time of the unit.

2.Press the “ESC” key till the main menu is displayed.

3.Press the right arrow key till a line is present under “EDIT”.

4.Press “Enter”.

5.Press the right arrow key until “EXERCISE TIME/DAY” is displayed.

6.Press “Enter”.

READY TO RUN

1 2 / 1 0 / 0 8 0 9 : 3 0 M o n

DATE AND TIME

MAIN

MENU

EDIT

Figure 47. The Date and Time, and Main Menu

Screens

7.Adjust exercise time to about 3 to 4 minutes ahead of the date and time noted in Step 1.

8.Press “ESC” until “READY TO RUN” is displayed. The AUTO-OFF-MANUAL switch must be in AUTO for the unit to exercise.

9.Watch the generator display and note the time. When the date and time reaches the time that was programmed for exercise, the unit will display "Running in Exercise" if the exercise feature is working properly.

Results:

1.In all models, if the unit starts in MANUAL, but fails to exercise without any ALARMS present, replace the printed circuit board.

Test 80 – Check Cranking and Running

Circuits

Discussion:

This test will check all of the circuits that are “HOT” with battery voltage and which could cause the Main Fuse to blow.

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