Generac 20kW — 17

For the Generac 20kW.

Procedure

3.1 CONTROL PANEL INTERFACE
3.1.1 USING THE AUTO/OFF/MANUAL SWITCH (FIGURE 3.1) n With the switch set to AUTO, the engine may crank and start at any time without warning. Such automatic starting occurs when utility power source voltage droops below a preset level or during the normal exercise cycle. To prevent possible injury that might be caused by such sudden starts, always set the switch to OFF and remove the fuses before work- ing on or around the generator or transfer switch. Then, place a “DO NOT OPERATE” tag on the generator panel and on the trans- fer switch.
1. “AUTO” Position – Selecting this switch activates fully auto- matic system operation. It also allows the unit to automati- cally start and exercise the engine every seven days with the setting of the exercise timer (see the Setting the Exercise Timer section).
2. “OFF” Position – This switch position shuts down the engine. This position also prevents automatic operation.
3. “MANUAL” Position – Set the switch to MANUAL to crank and start the engine. Transfer to standby power will not occur unless there is a utility failure.
3.1.2 SETTING THE EXERCISE TIMER This generator is equipped with an exercise timer. Once it is set, the generator will start and exercise every seven days, on the day of the week and at the time of day specified. During this exercise period, the unit runs for approximately 12 minutes and then shuts down. Transfer of loads to the generator output does not occur during the exercise cycle unless utility power is lost. Figure 3.1 – 8/10/13/14/16/17 & 20kW Generator Control Panel Escape MAIN FUSE AUTO OFF MANUAL
7.5 AMP Enter INSTALLATION ASSISTANT Interconnect System Self Test Feature (follow the on-screen prompts) Upon power up, this controller will go through a system self test which will check for the presence of utility voltage on the DC circuits. This is done to prevent damage if the installer mistakenly connects AC utility power sense wires into the DC terminal block. If utility voltage is detected, the controller will display a warning message and lock out the generator, preventing damage to the controller. Power to the controller must be removed to clear this warning. Utility voltage must be turned on and present at the N1 and N2 terminals inside the generator control panel for this test to be performed and pass. NOTE: DAMAGE CAUSED BY MISWIRING OF THE INTERCONNECT WIRES IS NOT WARRANTABLE! This test will be performed each time the controller is powered up. Upon first power up of the generator, the display interface will begin an installation assistant. The assistant will prompt the user to set the minimum settings to operate. These settings are sim- ply: Current Date/Time and Exercise Day/Time. The maintenance intervals will be initialized when the exercise time is entered (Figure
3.1). The exercise settings can be changed at any time via the "EDIT" menu (see Appendix, "Menu System"). If the 12 volt battery is disconnected or the fuse removed, the Installation Assistant will operate upon power restoration. The only difference is the display will only prompt the customer for the current Time and Date. IF THE INSTALLER TESTS THE GENERATOR PRIOR TO INSTALLATION, PRESS THE “ENTER” KEY TO AVOID SETTING UP THE EXERCISE TIME. THIS WILL ENSURE THAT WHEN THE CUSTOMER POWERS UP THE UNIT, HE WILL STILL BE PROMPTED TO ENTER AN EXERCISE TIME. NOTE: The exerciser will only work in the AUTO mode and will not work unless this procedure is performed. The current date/time will need to be reset every time the 12 volt battery is disconnected and then reconnected, and/or when the fuse is removed. Low Speed Exercise 17 and 20kW units will run at 2,400 rpm. Operation

Source: manual:9f84685f-0bec-42e0-a4e9-5c2c50b4b67b.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.