Generac Power Systems 17 kW LP, 10 kW LP, 7 kW NG Test 56 Check Position Of Auto-Off Manual Switch

DC control

Part 4

Section 4.4

Diagnostic tests

Introduction

Perform these “Diagnostic Tests” in conjunction with the “Troubleshooting Flow Charts” of Section 4.3.

The test procedures and methods presented in this section are not exhaustive. The manufacturer could not possibly know of, evaluate and advise the service trade of all conceivable ways in which testing and trouble diagnosis might be performed. The manufacturer has not undertaken any such broad evaluation.

Test 56 – Check Position Of Auto-Off-

Manual Switch

DISCUSSION:

If the standby system is to operate automatically, the generator AUTO-OFF-MANUAL switch must be set to AUTO. That is, the generator will not crank and start on occurrence of a “Utility” power outage unless that switch is at AUTO. In addition, the generator will not exercise every seven (7) days as programmed unless the switch is at AUTO.

AUTO

OFF

MANUAL

Figure 1. AUTO-OFF-MANUAL Switch Positions

PROCEDURE:

With the AUTO-OFF-MANUAL switch set to Auto, test automatic operation. Testing of automatic opera- tion can be accomplished by turning off the Utility power supply to the transfer switch. When the utility power is turned off, the standby generator should crank and start. Following startup, transfer to the standby source should occur. Refer to Section 1.8 in this manual.

Following generator startup and transfer to the standby source, turn ON the utility power supply to the transfer switch. Retransfer back to the “Utility” source should occur. After an “engine cooldown timer” has timed out, generator shutdown should occur.

RESULTS:

1.If normal automatic operation is obtained, discontinue tests.

2.If engine does not crank when utility power is turned off, proceed to Problem 15 Flow Chart, Section 4.3.

3.If engine cranks but won’t start, go to Problem 17 in Section 4.3.

4.If engine cranks and starts, but transfer to “Standby” does not occur, go to Problem 7 in Section 3.3.

5.If transfer to “Standby” occurs, but retransfer back to “Utility” does not occur when utility source voltage is restored, go to Problem 8 in Section 3.3.

Test 57 – Try a Manual Start

DISCUSSION:

The first step in troubleshooting for an “engine won’t crank” condition is to determine if the problem is peculiar to automatic operations only or if the engine won’t crank manually either.

PROCEDURE:

1.On the generator panel, set the AUTO-OFF-MANUAL switch to OFF.

2.Set the generator main line circuit breaker to its OFF (or open) position.

3.Set the generator AUTO-OFF-MANUAL switch to MANUAL.

a.The engine should crank cyclically through it’s “crank-rest” cycles until it starts.

b.Let the engine stabilize and warm up for a few minutes after it starts.

RESULTS:

1.If the engine cranks manually but does not crank automatically, go to Problem 15, Section 4.3.

2.If the engine does not crank manually, proceed to Problem 16 in the “Troubleshooting Flow Charts”.

Test 58 – Auto-Off-Manual Switch

(V-Twin Only)

PROCEDURE:

1.Press the “ESC” key on the controller until the home page is reached.

2.Press the right arrow key until “Debug” flashes. Press “Enter” and the following screen will appear. See Figure 2, Screen 2.

3.Press “Enter” when “Inputs” is flashing.

4.With the Inputs Screen displayed, place the AUTO- OFF-MANUAL switch to the AUTO Position. If the controller reads an input from the switch, Input 7 will change from “0” to “1”.

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