Section 2 - Troubleshooting; System Control Panel(Scp) - Briggs & Stratton 076000NG Service & Troubleshooting Manual

SECTION 2 - TROUBLESHOOTING

SYSTEM CONTROL PANEL(SCP)

The System Control Panel (SCP) is a printed
circuit board that is integrated with the control
panel of the Home Standby System. It contains
all the logic circuits, operator controls, and
system displays necessary to operate, program,
and protect the generator. The system control
panel interprets and monitors electrical inputs
from related circuits throughout the standby
installation.
Before replacing the system control panel, all
other circuits must be tested to ensure proper
operation. When a failure has been traced to the
system control panel, the board must be
replaced as a complete assembly.
Functions of the System Control Panel:
• Battery Trickle Charge
• Set Exercise Timer (SET EXERCISE)
• Manual Start (MANUAL OVER-RIDE)
• Sensing Utility Voltage
• Automatic Start, in event of utility failure
• Automatic Engine Cool-Down Timer
• Fault Code Detection with Automatic
Shutdown
• Fault Indication Display (LED)
• Diagnostic Access Port (SERVICE
TOOL)
• Hour Meter
Power During SCP Fault Conditions
When the Home Generator System experiences
a fault condition, the automatic transfer switch
automatically defaults to UTILITY POWER.This
ensures that utility power is available to all
circuits in the home until the fault is corrected.
If the unit fails to exercise at its prescribed time,
check for a fault code on the generator control
panel display. If no fault code is shown, perform
the SET EXERCISE procedure.
How to ACCESS the System Control Panel
The system control panel is mounted behind the
face of the control panel (Figure 1,A).
1. Remove the control panel door.
Figure 1
2. Make sure the SYSTEM switch is set to
OFF.
3. Remove the 15 AMP fuse from the system
control panel.
4. Disconnect the negative (-) battery cable.
5. Disconnect 10-pin connectors from the
edge of the system control panel board.
6. Remove the four mounting screws (Figure
2, A) that secure the face of the control
panel, then carefully remove and tilt down
the panel to expose the board.
Figure 2
The system control panel is connected to its
various circuits through three connectors that are
mounted directly to the board (Figure 3), shown
tilted down.
2
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