Exercise; Faults; Warnings; Shutdowns - Kohler 6VSG Operation Manual

2.5

Exercise

The VSC controllers can be set to automatically run the generator set at the same time and day each week. Exercising the
generator set weekly or every two weeks is required to keep the engine and alternator in good operating condition.
When power is applied to the VSC controller (that is, when the battery is connected), you will be prompted to set the date an d
time, and then to set the exerciser. See the VSC Generator Set Controller section for more information.
An exercise can be started at any time using Kohler
programmed on the VSC controller.
Three exercise modes are available. During some exercise modes the engine speed increases and decreases. This is normal.
1. Unloaded Full Speed Exercise. The generator regulates the output load below 5% of capacity. The generator will stop
after 20 minutes.
2. Unloaded Cycle Exercise. The generator set engine speed varies during the 20-minute exercise according to the
following cycle:
a. The generator set regulates the output load below 5% of capacity for 11 minutes to warm up.
b. The output regulation is moved to the Genset Maximum Percent Capacity for 3 minutes to test ability to output
power.
c. The load limit is returned to 5% for 6 minutes to allow the generator to cool down before stopping.
3. Loaded Full Speed Exercise. The generator operates normally. Voltage is regulated to Voltage Regulator Average
Voltage Adjustment, and load is regulated to Genset Maximum Percent Capacity. The generator stops after 20 minutes,
regardless of the load on the generator.
2.6

Faults

The VSC controller displays fault messages for generator set warnings and shutdowns. Selected fault messages are shown in
the figure titled: Controller Fault Messages.
2.6.1

Warnings

The controller displays a fault message but the generator set does not shut down on a warning. The controller resets
automatically after a warning condition is corrected.
2.6.2

Shutdowns

Under a fault shutdown condition, the generator set shuts down automatically and the controller displays a fault message. The
OFF LED flashes. In some cases, the engine cooldown cycle runs before the engine shuts down. See the figure titled: Controller
Fault Messages.
Shutdown switches (such as the low oil pressure switch or high engine temperature switch) on the generator set will automatic ally
reset when the problem is corrected. However, the fault condition at the controller does not clear until the controller is reset.
The generator set cannot be restarted until the fault condition is corrected and the controller is reset. See Resetting The
Controller after a Fault Shutdown for instructions.
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OnCue Plus, or can start automatically according to the exercise schedule
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