Section 3 Troubleshooting; Introduction; Initial Checks; Troubleshooting Chart - Kohler 17RES Manual

3.1 Introduction

Corrective action and testing in many cases requires
knowledge of electrical systems and electronic circuits.
Have an authorized distributor/dealer or trained service
technician perform testing and service.
Refer to the engine service manual for engine service
information. See the List of Related Materials for the
document part number.
If the troubleshooting procedures in this section identify
a failed part, refer to the parts catalog for replacement
part numbers. See the List of Related Materials in the
Introduction for the parts catalog number.

3.2 Initial Checks

When troubleshooting, always check for simple
problems first. Check for the following common
problems before replacing parts:
Loose connections or damaged wiring.
D
Dead battery.
D
Fault shutdown. Check for a fault code on the
D
controller display. Section 4.4 describes the warning
and shutdown fault codes.
Problem Possible Cause
Battery connections Check for reversed or poor
Generator
set engine
does not
Weak or dead
crank
battery
Open circuit in
engine/controller
connections
Blown controller
fuse F3
* ADC-RES controller only. The DC-RET controller settings cannot be adjusted in the field.
W/D = Wiring Diagram(s) (Section 7)
I/M = Generator Set Installation Manual
TP-6519 8/17
Test
battery connections.
Test the battery voltage.
Test battery according to battery
manufacturer's recommendations.
If battery is weak or dead, check
the battery charger.
Check battery charger fuse and
connections.
Check 120VAC power supply to
the charger.
Test charger operation.
Check for loose connections.
Check the wire harness continuity.
Use a test lamp or meter to check
fuse F3.
S/S = Generator Set Specification Sheet
Engine S/M = Engine Service Manual

Section 3 Troubleshooting

Blown fuses. Fuses on the controller junction box
D
protect the controller, SCR module, and optional
relay interface board.
located in the positive battery lead. Always check for
and replace any blown fuses before replacing other
components. Identify and correct the cause of the
blown fuse. See Figure 1-1 for fuse locations and
Section 5.13.2 for fuse part numbers.
Incorrect controller settings. Always check the
D
controller configuration settings before replacing the
controller. Section 4.5 contains the instructions for
checking and changing the controller configuration.
Inadequate fuel supply.
D
primary or secondary
connections to the fuel solenoid valve, a damaged or
closed fuel shutoff valve, an empty LP fuel tank, or
other problems with the fuel supply. Check the fuel
supply pressure to the generator set.
Section 5.12, Fuel Systems.

3.3 Troubleshooting Chart

Use the following table as a reference in troubleshooting
individual problems. Generator set faults are listed in
groups and include likely causes and remedies. The
simplest and most likely causes of the problem are listed
first; follow the recommendations in the order shown.
The reference column provides additional sources of
information in this and related manuals regarding the
problem and solution.
Corrective Action
Correct and tighten battery
connections.
Recharge or replace battery.
Tighten connections and replace
charger fuse if blown.
Connect 120VAC power to
charger.
Replace charger if necessary.
Tighten connections.
Replace harness or harness leads
if damaged.
Replace fuse; if fuse blows again,
check circuit and components.
O/M = Generator Set Operation Manual
A battery charger fuse is
Check for damaged
fuel regulators, loose
See
Reference
—
O/M
O/M
Section 5.15
Section 7
Section 5.13.2
Section 7
Section 3 Troubleshooting 25