Section 6.2 A6060 CIRCUIT BOARD

GENERAL

The A6060 circuit board controls all phases of engine operation including cranking, starting, running and shutdown.

The circuit board interconnects with other compo- nents of the engine electrical system.

The board Is powered by fused 12 VDC battery out- put, available to the board via Wire 15.

Figure 1. A6060 Circuit Board

CIRCUIT BOARD CONNECTIONS

RECEPTACLE J1:

The A6060 circuit board mounts an 8-pin receptacle J1. An 8-pin connector plug connects to the A6060. This harness then connects to a 9-pin connector plug on the outside panel of the control box. This becomes the 9-wire harness that connects to the inverter. Signals from the A6060 circuit board control the func- tions of the inverter.

RECEPTACLE J2:

The A6060 circuit board mounts a 10-pin receptacle J2. A 10-pin connector plug connects to this recepta- cle to interconnect the board with other components and circuits.

This 10-pin receptacle is shown in Figure 2, along with a chart that Identifies each pin, wire and function.

Wire 14 connects to Terminal J2-9. This terminal and wire are electrically hot (12 volts DC) only when the engine is cranking or running. Battery voltage is deliv- ered to Terminal J2-9 when circuit board action ener- gizes a board-mounted run relay while cranking or running.

Wire 14 DC output is delivered to (a) the engine fuel pump and (b) the engine ignition system. If an option- al remote panel Is used, Wire 14 DC output will turn on a "RUN" lamp on that panel.

Wire 15 connects to Terminal J2-5. This Is fused bat- tery voltage. The Wire 15 circuit is electrically hot at all times (provided the unit battery Is connected).

 

 

Figure 2. Receptacle J2

PIN

WIRE

FUNCTION

 

 

 

1

Not Used

 

 

 

2

18

 

 

 

 

3

85

When grounded by Low Oil Pressure or High

 

 

Oil Temperature Switch, the circuit board will

 

 

shut down the engine

 

 

 

4

17

When Wire 17 is connected to ground by

 

 

holding Start-Run Stop Switch at START,

 

 

cranking will occur.

 

 

 

5

15

Fused battery voltage. The Wire 15 circuit is

 

 

electrically hot at all times (provided the unit

 

 

battery is connected).

 

 

 

6

0

Common frame ground.

 

 

 

7

90

Delivers 12 VDC to automatic choke solenoid

 

 

coil while cranking only.

 

 

 

8

56

Delivers 12 VDC to starter contactor while

 

 

cranking only.

 

 

 

9

14

Delivers 12 VDC (during cranking and run

 

 

ning) to (a) Engine Fuel System, (b) Engine

 

 

Ignition System and (c) Remote Panel Lamp

 

 

if so equipped.

 

 

 

10

Not Used

 

 

 

NOTE 1: - See "SHUTDOWN FEATURES” In Section 6.5 (Page 6.5-1).

RECEPTACLE J3:

The A6060 circuit board mounts a 6-pin receptacle J3. A 6-pin connector plug connects to the A6060. This harness then connects to Stepper Motor. Signals from the A6060 circuit board control the Stepper Motor operation. Refer to page 3.6-1 for test proce- dures.

(continued)

Page 6.2-1

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Generac Power Systems 941-2, 940-2 service manual Circuit Board Connections, Receptacle J1, Receptacle J2, Receptacle J3

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