Centurion Standby Generators Error Codes

CONTROL BOARD FAILURE

Display is blank or frozen, or shows CONTROL BOARD FAILURE; generator does not respond to commands.

Main Control PCB Failure

ECU COMMUNICATION ERROR

Display shows ECU COMM ERROR or CAN BUS FAULT; generator may not start or may run with limited functionality.

Loss of Communication Between Engine ECU and Control Panel

EXCITATION LOSS

Generator runs but produces little or no voltage; control panel may show EXCITATION LOSS or FIELD LOSS.

Loss of Alternator Field Excitation

GENERATOR OVERLOAD

Generator runs, then trips with GENERATOR OVERLOAD or LOAD SHED fault; transfer switch may drop load.

Overcurrent / Overload Protection Trip

GENERATOR SHORT CIRCUIT

Immediate shutdown with SHORT CIRCUIT or FAULT CURRENT error when generator attempts to pick up load.

Output Short Circuit Protection Trip

GROUND FAULT

Control panel shows GROUND FAULT; generator may shut down or refuse to transfer load.

Detected Ground Fault on Output

HIGH COOLANT TEMP

Generator runs briefly then shuts down with HIGH COOLANT TEMP or HIGH TEMP fault; cooling fan may run loudly before shutdown.

Engine Overtemperature Shutdown

HIGH FUEL PRESSURE

Control panel shows HIGH FUEL PRESSURE or FUEL REGULATOR fault; engine may run rough or surge.

Excessive Fuel Pressure at Engine Inlet

LOW BATTERY

Control panel displays LOW BATTERY or BATTERY VOLTAGE LOW; generator may crank slowly or not at all.

Low DC Battery Voltage

LOW COOLANT TEMP / COLD START

Generator displays LOW COOLANT TEMP or COLD START warning and may crank longer than usual in cold weather.

Low Engine Temperature / Cold Start Condition

LOW FUEL PRESSURE

Generator starts then stalls under load and displays LOW FUEL PRESSURE or FUEL SUPPLY fault.

Insufficient Fuel Pressure to Engine

LOW OIL PRESSURE

Generator starts then quickly shuts down and displays LOW OIL PRESSURE fault, or will not start and immediately shows this code.

Low Oil Pressure Shutdown

NEUTRAL LOSS

Control panel indicates NEUTRAL LOSS or NEUTRAL FAULT; unusual voltages may be observed in the home.

Open or Loose Neutral Conductor

OVER FREQUENCY

Control panel shows OVER FREQUENCY; generator may sound like it is running too fast.

High Engine Speed / Overfrequency

OVER VOLTAGE

Generator runs but shuts down with OVER VOLTAGE fault; lights in the home may briefly brighten during transfer.

Generator Output Overvoltage

OVERCRANK

Generator attempts to start multiple times but fails to run, then shuts down and displays OVERCRANK fault.

Overcrank – Failed Engine Start

OVERSPEED

Generator starts but quickly shuts down and displays OVERSPEED fault; may sound unusually loud or high-pitched just before shutdown.

Engine Overspeed Protection Trip

PHASE IMBALANCE

On three-phase Centurion units, control panel shows PHASE IMBALANCE or VOLTAGE IMBALANCE; some loads may trip breakers.

Unequal Phase Voltage or Load

SENSOR FAILURE

Control panel shows SENSOR FAILURE or INPUT FAULT; generator may refuse to start or may shut down unexpectedly.

Failed Engine or System Sensor Input

SERVICE DUE

Control panel displays SERVICE DUE or MAINTENANCE REMINDER; generator still runs normally.

Scheduled Maintenance Reminder

SPARK FAILURE

Generator cranks normally but does not start; control panel shows SPARK FAILURE or IGNITION FAULT.

Ignition System Failure

STARTER FAULT

Control panel shows STARTER FAULT; generator may click but not crank, or starter may stay engaged.

Starter Motor or Solenoid Failure

STARTER LOCKOUT

Control panel displays STARTER LOCKOUT; generator will not crank even though battery is good.

Starter Circuit Lockout After Multiple Failed Attempts

UNDER FREQUENCY

Control panel shows UNDER FREQUENCY or RPM LOW; lights may dim and motors may sound strained when on generator power.

Low Engine Speed / Underfrequency

UNDER VOLTAGE

Generator runs but displays UNDER VOLTAGE fault; home loads may drop out or transfer switch may not engage.

Generator Output Undervoltage

Symptom

Corrosion on battery terminals and metal parts inside Centurion generator enclosure.

Corrosion and Oxidation Damage

Symptom

Generator cranks but does not start – no firing, exhaust smells like unburned fuel.

Crank-No-Start (Fuel or Ignition Issue)

Symptom

Generator runs but is excessively noisy – knocking, pinging, or metallic sounds from engine compartment.

Abnormal Engine Noise

Symptom

Generator starts but immediately stalls when load is applied from the transfer switch.

Stall Under Load

Symptom

Generator vibrates excessively during operation; enclosure panels rattle loudly.

Excessive Vibration

Symptom

Generator will not start at all – no crank, no click from starter, display may be on.

No-Crank Condition

Symptom

Rodent nests, chewed wires, or insect infestation inside generator enclosure.

Pest Damage to Wiring and Components

Symptom

Strong fuel gas smell around Centurion generator enclosure during or after operation.

Fuel Leak or Incomplete Combustion

Symptom

Transfer switch does not transfer to generator power during outage even though generator is running normally.

No Transfer to Generator

Symptom

Transfer switch remains on generator power after utility is restored; generator continues to run.

Failure to Re-Transfer to Utility

Symptom

Visible oil leak under generator, oil spots on pad or inside enclosure.

External Engine Oil Leak

Symptom

Water pooling inside generator enclosure or signs of rust and corrosion on components.

Water Ingress into Enclosure