4-12
Copyright 2017 Cummins Inc.
TROUBLESHOOTING PROCEDURE
The following tables are a guide to help you evalu-
ate problems with the generator set. You can save
time if you read through the manual ahead of time
and understand the system.
To determine the appropriate troubleshooting
procedure for the specific problem at hand, be
sure to refer to the “Indicators” column pro-
vided in each troubleshooting table.
Try to think through the problem. Go over what was
done during the last service call. The problem could
be as simple as a loose wire, an opened fuse or a
tripped circuit breaker. (Table 4-32 describes the
location and function of each fuse.)
Figure 4-2 shows the location of the components
within the control panel that are referenced in the
following troubleshooting procedures. Connector,
LED and switch locations for each circuit board and
module are provided in Section 3. The control wiring
and circuit board connections are shown in Section
7.
CAUTION
Always set the Run/Off/Auto (S12)
switch to the Off position and the Power On/
Standby (S5) switch to the Standby position be-
fore disconnecting or connecting harness con-
nectors. Otherwise, disconnecting the harness
connectors can result in voltage spikes high
enough to damage the DC control circuits of the
generator set.
CAUTION
Electrostatic discharge will damage
circuit boards. Always wear a wrist strap when
handling circuit boards or socket-mounted IC’s
and when disconnecting or connecting harness
connectors.
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