Common Generator Fault Codes & What To Do

AC Sensing Loss

The fault lamp illuminates yellow and the alarm horn sounds when the controller does not detect the nominal generator set AC output voltage after crank disconnect. The controller displays AC Sens Loss Warning.

Battery Charger Fault

The fault lamp illuminates yellow and the alarm horn sounds when the battery charger malfunctions. This fault feature requires an optional battery charger with a malfunction output for the lamp to function. Local display shows Batt Chg Flt Warning.

Low Battery Voltage

The fault lamp illuminates yellow and the alarm horn sounds when the battery voltage drops below a preset level for more than 90 seconds. The local display shows Low Battery Warning.

Low Engine Oil Level

The fault lamp illuminates yellow and the alarm horn sounds because of low engine oil level. This fault feature requires an option allow engine oil level sensor for the lamp to function. Local display shows Oil Level Low Warning.

Low Oil Pressure

The fault lamp illuminates yellow and the alarm horn sounds when the engine oil pressure approaches the shutdown range. The low oil pressure warning does not function during first the 30 seconds after startup. The local display shows Oil Press Low Warning.

Not in Auto (Generator Master Control Switches)

The fault lamp illuminates yellow and the alarm horn sounds when the generator set master control button is in the RUN or OFF/RESET mode. The local display shows Not In Auto Warning.

Overcrank

The fault lamp illuminates red, the alarm horn sounds, and cranking stops when the unit does not start within the defined cranking period. The local display shows Over Crank Shutdwn. See Section 2.3.1, Auto Starting, and Section 1.3.1, Status Event and Fault Specifications for cyclic crank specifications

Undervoltage

The fault lamp illuminates red, the alarm horn sounds, and the unit shuts down when the voltage drops below the undervoltage setting for the time delay period. The local display shows Volts (L1–L2, L2–L3, or L3–L1) Low Shutdwn. See Figure 2-7 for undervoltage specifications

What happens if I receive one of these warnings?

Please reset your generator for all but Low oil level and Low Oil Pressure please call our off

If you have either of these two code please shut generator off and contact our office at 612-284-1550.

To reset a Generac

  • Unlock and lift lid of generator
  • Push off on controller – some units you may need to push the enter button
  • Push the manual button – you may need to hit enter
  • If generator starts and runs let run for 5 min shut off and put into auto generator is now ready to run
  • If generator does start, please shut generator off and call our office for further assistance 612-284-1550

To reset a Briggs or GE

  1. Unlock and open lid of generator
  2. Turn generator off by pushing off on controller
  3. Once generator is off locate fuse under flap on controller that will ether be next to display screen or it will be under it and run full width of controller.
  4. Once you locate the fuse remove it from its slot and wait 30 seconds
  5. After 30 seconds replace fuse in slot and push manual button.
  6. If generator starts and runs let run for 5 min shut off and put into auto generator is now ready to run
  7. If generator does start, please shut generator off and call our office for further assistance 612-284-1550