TP-5737 5/01 33Section 5 Decision-Makert 3+ Troubleshooting
Accidental starting.
Can cause severe injury or death.
Disconnect the battery cables before
working on the generator set.
Remove the negative (--) lead first
when disconnecting the battery.
Reconnect the negative (--) lead last
when reconnecting the battery.
WARNING
Disabling the generator set. Accidental starting can
cause severe injury or death. Before working on the
generator set or connected equipment, disable the generator
set as follows: (1) Move the generator set master switch to the
OFF position. (2) Disconnect the power to the battery charger.
(3) Remove the battery cables, negative (--) lead first.
Reconnect the negative (--) lead last when reconnecting the
battery. Follow these precautions to prevent starting of the
generator set by an automatic transfer switch, remote
start/stop switch, or engine start command from a remote
computer.
5.3.1 Troubleshooting
Use the following charts as a quick reference in
troubleshooting individual problems. Consult the first
chart for aid in locating the cause of blown fuses. In the
successive charts, generator faults are listed by specific
groups and correlated with possible causes and
corrective action. Before beginning any troubleshooting
procedure, read all safety precautions at the beginning
of this manual and those included in the text. Do not
neglect these precautions.
Note: If starting the unit by remote switch, verify proper
operation of the remote switch before
troubleshooting the controller. Test the remote
switch operation by placing the generator set
master switch in the AUTO position and running a
jumper between terminals 3 and 4 on the
controller circuit board. If the generator does not
start, proceed with the controller troubleshooting
procedure outlined in the following pages.
To quickly check the condition of the components
mentioned in the following flowcharts, use an ohmmeter
to read resistance between the designated terminal and
ground. See Figure 5-16. With the ohmmeter on the
R x 1 scale, a reading of less than one ohm (continuity)
indicates that the component may be inoperative.
Isolate the inoperative component and repair or replace
it.
Component
Connect between
ground and terminal:
Engine gauges Connector P2, pin 1
Crank (K1 relay) circuit Connector P1, pin 1
(Diesel) fuel solenoid circuit Connector P1, pin 7
Figure 5 -15 Checking P1 and P2 Connections
3-187
W
1
2
1. Ground connection
2. P2 connection
Figure 5 -16 Checking P1 and P2 Connections
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