Section 3 - Operation

Liquid-cooled 15, 20 and 25 kW Generators

3.7CONTROL BOARD DIP SWITCH

SETTINGS

Located on the control board is an eight position DIP switch (see Figure 3.2). The eight different switches, are used to configure the control board for the spe- cific engine and governor being used and are pre-set at the factory.

If the DIP switch settings are not set correctly,

!the generator may not start or operate correct- ly.

240 VAC can be present within the control panel.

If it is necessary to select an alternate switch position, move the AUTO/OFF/MANUAL switch to the OFF position. Remove the 15 amp fuse in the generator control panel. Move the DIP switch position that needs to be changed to its new position. Wait five sec- onds, then re-install the 15 amp fuse.

The ON position is marked on the switch and is shown in Figure 3.2.

Switch Position 1 — Selects the generator alternator output frequency and is factory pre-set for 60 Hz.

Switch Position 2 — Selects the type of transfer switch and is factory pre-set for an automatic trans- fer switch (ATS).

Switch Position 3 — Selects the type of governor control used, and is factory pre-set for stepper motor operation.

Switch Position 4 — Selects the type of fuel being used and is factory pre-set for natural gas (NG).

Switch Position 5 — Selects the engine displacement and is factory pre-set for a 2.5 liter (2.5L) engine.

Switch Position 6 — Selects the number of engine cylinders and is factory pre-set for four cylinders.

Switch Position 7 — Selects the direction of rotation of the governor stepper motor and is factory pre-set for CCW rotation (rotation is observed looking at the stepper shaft as it moves from closed throttle to open throttle).

Switch Position 8 — Selects whether the control is in the Normal Mode of operation or Test Mode. In the Normal Mode of operation, pre-determined governor gains are used and the gain trimpots on the control board (Gain, Stability, and Differential) are not active and have no effect on the gains. In Test Mode the gain trimpots are active and can be adjusted. See Section 3.3.

3.8VOLTAGE REGULATOR

ADJUSTMENT

Four adjustment potentiometers are provided on the voltage regulator installed in the control panel (Figure 3.4). These are (a) voltage adjust, (b) gain, (c) stabili- ty and (d) underfrequency adjust. The voltage regula- tor potentiometers have been factory set and SHOULD NOT be adjusted. If however, adjustments are necessary, contact the local Dealer to implement the following procedure.

High voltage is present inside the control panel during this procedure.

1.Disconnect all electrical loads from the generator (initial adjustments are done under no-load con- ditions).

Figure 3.4 — Voltage Regulator

2.Connect an accurate AC voltmeter and AC fre- quency meter to the generator’s AC output leads.

3.On the voltage regulator, set the potentiometers as follows:

A.Turn the Voltage Adjust pot fully counterclock- wise (CCW).

B.Set the GAIN pot to its centered (mid) position.

C.Set the STABILITY pot to its centered (mid) position.

D.DO NOT adjust the UNDERFREQUENCY ADJUST pot.

4.Start the engine. Let it stabilize and warm up at no-load.

5.Verify that the three voltage regulator’s LED’s are ON.

6.Check the reading on the AC frequency meter.

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Generac 005031-0 (25kW), 005030-0 (15kW) owner manual Control Board DIP Switch Settings, Voltage Regulator Adjustment

005030-0 (15kW), 005031-0 (25kW) specifications

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