Generac Power Systems 16 kW NG User Manual

CONTROLLER DISPLAY

Running / Cooling Down

= 12 VDC ALWAYS PRESENT
= AC VOLTAGE
= GROUND FOR CONTROL PURPOSES
= 12 VDC DURING CRANKING ONLY
= 12 VDC DURING ENGINE RUN CONDITION
= DC FIELD EXCITATION
= 5 VDC TO LED

0

4

4

0

BA

6

11

22

6

2

2

REGULATOR

11

2
6
0
4

22

VOLTAGE

4

0

0

13

13

18

SP2

IM2

16

13

SCR

0

0

86

85

HTO

LOP

18

0

13

12V

BATTERY

SCR

SM

IM1

SP1

44

11

POWER

WINDING

33

22

WINDING

POWER

STATOR

4

0

56

0

SC

820

817
818
819

819

818

817

820

L2

L1

LED BOARD

4

3

2

1

4

ACTUATOR

GOVERNOR

14

14

90

OUTPUT

GENERATOR

240 VAC

NEUTRAL

INPUT

UTILITY

240 VAC

TRANSFER

+ BATTERY

GROUND

56

0

15B

23

23

0

0

FS

BATTERY WARMER

OPTIONAL

N1

00

22

33

11

44

CB

15B

14

0

0

CS

N2

N1

2

1

N2

N1

18

13

86

85

4

3

2

1

18

17

16

15

14

13

12

10

9

11

8

6 7

4

3

5

CB - CIRCUIT BREAKER, MAIN OUTPUT

HTO - HIGH TEMPERATURE SWITCH

FS - FUEL SOLENOID

LEGEND

SCR - STARTER CONTROL RELAY

SC - STARTER CONTACTOR

CS - CHOKE SOLENOID

LOP - LOW OIL PRESSURE SWITCH

SM - STARTER MOTOR

BA - BRUSH ASSEMBLY

IM_ - IGNITION MODULE

SP_ - SPARK PLUG

0

J3

J1

PRINTED CIRCUIT BOARD

TO

PCB

7.5 AMP FUSE

SELF RESETTING FUSE

CONTROLLER

J2

Page 114

The  “Load”  is  powered  by  the  standby  power  supply. The  circuit  board  continues  to  seek  an  acceptable  utility 
source voltage. On restoration of utility source voltage, the following events will occur:

•  On restoration of utility source voltage above 75 percent of the nominal rated voltage, a “retransfer time delay”

on the circuit board starts timing. The timer will run for about fifteen (15) seconds.

•  At the end of fifteen (15) seconds, the “retransfer time delay” will stop timing and circuit board action will open

the Wire 23 circuit to ground. The transfer relay (TR) will then de-energize.

•  When  the  transfer  relay  (TR)  de-energizes,  its  normally-closed  contacts  close.  Utility  source  voltage  is  then

delivered to the utility closing coil (C1), via Wires N1A/N2A, the closed TR contacts, Wire 126, limit switch XA1, 
and a bridge rectifier.

DC CONTROL