Kohler APM402 User Manual

114 TP-6694 9/20
4.1 General Troubleshooting Chart
Section or Publication Reference*
Controller
Gen. S/M
W/D
Gen. S/M
See the
Section titled:
Specifications and Features, W/D
--
See the
Section titled:
Operations
See the
Section titled:
Operations, W/D, Gen. S/M
W/D, Gen. S/M
See
the Section titled:
General Troubleshooting Chart
* Sec./Section
—numbered section of this manual; ATS
—Automatic Transfer Switch; Eng.
—Engine; Gen.
—Generator Set; Alt.
—Alternator; I/M
—Installation Manual;
O/M
—Operation
Manual; S/M
—Service Manual; S/S
—Spec Sheet; O/S/M
—Operation/Service Manual; W/D
—Wiring Diagram
† Have an authorized service distributor/dealer perform this service.
Recommended Actions
Replace the controller.
Check the wiring.
Troubleshoot the controller.†
Check for continuity across
fuse. If fuse is blown,
troubleshoot the controller wiring and replace circuit board.
Replace the controller master control button circuit board.
Press the controller master control RUN or AUTO button.
Press the controller master control RUN button to test the generator set. Troubleshoot the auto start circuit and the time delays.
Replace the junction box sensing fuses. If the fuse blows again, troubleshoot the controller.
Review the controller display troubleshooting chart.
Probable Causes
Controller
circuit board(s) inoperative
Controller circuit board(s) wiring fault.
Controller fault.
Controller fuse blown
Controller master control buttons inoperative
Controller master control button in the OFF/RESET mode.
Engine start circuit open.
Voltage
regulation inoperative
Controller firmware error.
Trouble Symptoms
Exercise run time
and/or event records
inoperative
Displays error
message/locks up
x
Excessive or
abnormal noise
High fuel
consumption
Low oil pressure
Overheats
Lacks power
Stops suddenly
x
x
x
No or low output
voltage
x
Starts hard
Cranks but does not
start
x
x
x
Does not crank
x
x
x
x
x
x

Kohler APM402 Specifications

General

Brand	Kohler
Model	APM402
Category	Controller
Language	English