Kohler APM402 User Manual

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4.2 Controller Display and Voltage Regulation Troubleshooting Chart
Section or Publication Reference*
Controller Display and Voltage Regulator
See the
Section titled: Battery
See the
Section titled: Battery
See the
Section titled: Error Messages
See the
Section titled: Battery
Generator Service Manual
See the
Section titled: Voltage
Regulator Adjustments SiteTech O/M
See the
Section titled: Digital Display
SiteTech O/M
* 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
Recharge/replace battery.
Recharge battery.
Review the Error Message section.
Recharge/replace battery.
Troubleshoot alternator components. †
Readjust voltage regulation. †
Enable calibration in Generator Metering section.
Volt select
not enabled
Probable Causes
No/low battery charge.
Low battery voltage.
Controller firmware fault has occurred or pushbutton/ rotary selector dial entry error.
No/low battery charge.
Defective exciter winding.
Voltage regulation calibration incorrect.
Calibration not enabled.
Volt select not enabled
Trouble Symptoms
Display is black.
Display shows single segment.
Display shows an error message.
Display locks up.
Output voltage ramps
Output voltage unstable.
Unable to change voltage and current calibrations
Unable to find volt select menu

Kohler APM402 Specifications

General

Brand	Kohler
Model	APM402
Category	Controller
Language	English