DuroMax
DuroMax Standby Generators Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E01
Generator will not start, control panel shows E01 shortly after cranking attempt
Low Oil Shutdown / Oil Pressure Fault
E02
Generator shuts down shortly after start, control panel displays E02
High Engine Temperature / Overheat Shutdown
E03
Generator cranks but does not start, E03 displayed on control panel
No Fuel / Fuel Supply Fault
E04
Generator stops and displays E04, no AC output at time of shutdown
Overspeed / Engine RPM Too High
E05
Generator shuts down with E05, engine speed drops before shutdown
Underspeed / Engine RPM Too Low
E06
Control panel shows E06, generator will not crank when start is requested
Starter Circuit Fault / No Crank
E07
Generator runs but control panel shows E07 and no AC output is available
No AC Output / Alternator Excitation Fault
E08
Generator runs but E08 is displayed and output voltage is too high
Overvoltage Protection Trip
E09
Generator runs but E09 displayed and output voltage is too low or unstable
Undervoltage / Weak Excitation
E10
Control panel shows E10, generator will not start in automatic mode
ATS Communication / Remote Start Signal Fault
E11
Generator shuts down with E11 after running under load for several minutes
Overcurrent / Output Overload Trip
E12
Control panel displays E12, generator shuts down immediately after start attempt
Low Frequency / Loss of Engine Speed Signal
E13
Generator displays E13 and refuses to start, especially in cold weather
Low Battery Voltage / Battery Protection
E14
Control panel shows E14, generator will not start on LPG/NG fuel
Gas Fuel Pressure / Regulator Fault
E15
Generator displays E15 and shuts down randomly during operation
Emergency Stop / Safety Circuit Activated
E16
Control panel shows E16, generator runs but frequency is out of range (not 60 Hz)
Frequency Out of Range / Governor Calibration Fault
E17
Generator control panel shows E17, unit will not enter AUTO mode
Configuration / Parameter Error
E18
Control panel shows E18, generator shuts down shortly after transfer to load
Reverse Power / Backfeed Detection
E19
Generator displays E19, engine cranks but stops without firing
Ignition System Fault
E20
Control panel shows E20, generator will not start and fuel smell is present
Flooded Engine / Excessive Fuel
Symptom
Black smoke from exhaust and strong fuel smell, engine lacks power
Rich Fuel Mixture
Symptom
Corrosion and rust visible on generator frame and electrical connections
Corrosion / Environmental Damage
Symptom
Excessive vibration of generator enclosure during operation
Vibration / Mounting Isolation Failure
Symptom
Generator battery repeatedly goes dead between outages
Battery Not Charging / Parasitic Drain
Symptom
Generator cranks but will not start, no error code displayed
General No‑Start Condition
Symptom
Generator emits loud popping sounds from exhaust and runs rough
Backfiring / Misfire
Symptom
Generator fails to run scheduled exercise cycle
Exercise Timer / Scheduler Malfunction
Symptom
Generator is leaking coolant from under the radiator or hoses (liquid‑cooled models)
Coolant Leak
Symptom
Generator is leaking fuel from the carburetor area
Fuel Leak at Carburetor / Fuel Bowl
Symptom
Generator makes high‑pitched whining or grinding noise from alternator end
Alternator Bearing Wear / Mechanical Noise
Symptom
Generator produces loud knocking or banging noise from engine
Internal Engine Knock / Mechanical Damage
Symptom
Generator runs but produces no AC power, no error code displayed
Loss of Excitation / Open Output Circuit
Symptom
Generator runs but some circuits in the house have no power during outage
Partial Power / Load Distribution Issue
Symptom
Generator shuts down after running for a while, enclosure feels very hot
Overheating Without Code
Symptom
Generator starts automatically during outages but does not transfer load
Failure to Transfer Load
Symptom
Generator starts then stalls after a few seconds, no code shown
Fuel Starvation After Start
Symptom
Generator will not start automatically during a utility outage, but starts manually
Automatic Start Failure (ATS Control Issue)
Symptom
Oil leaking under generator, small puddle forming on base
Engine Oil Leak
Symptom
Strong raw fuel smell around generator during operation
Fuel Vapor Leak / Incomplete Combustion
Symptom
Unusual burning smell or melted plastic odor from generator enclosure
Overheating Electrical Component
Symptom
Visible blue or white smoke from exhaust during operation
Oil Burning / Excessive Exhaust Smoke
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
Generator will not start, control panel shows E01 shortly after cranking attempt
|
Low Oil Shutdown / Oil Pressure Fault | View Details |
| E02 |
Generator shuts down shortly after start, control panel displays E02
|
High Engine Temperature / Overheat Shutdown | View Details |
| E03 |
Generator cranks but does not start, E03 displayed on control panel
|
No Fuel / Fuel Supply Fault | View Details |
| E04 |
Generator stops and displays E04, no AC output at time of shutdown
|
Overspeed / Engine RPM Too High | View Details |
| E05 |
Generator shuts down with E05, engine speed drops before shutdown
|
Underspeed / Engine RPM Too Low | View Details |
| E06 |
Control panel shows E06, generator will not crank when start is requested
|
Starter Circuit Fault / No Crank | View Details |
| E07 |
Generator runs but control panel shows E07 and no AC output is available
|
No AC Output / Alternator Excitation Fault | View Details |
| E08 |
Generator runs but E08 is displayed and output voltage is too high
|
Overvoltage Protection Trip | View Details |
| E09 |
Generator runs but E09 displayed and output voltage is too low or unstable
|
Undervoltage / Weak Excitation | View Details |
| E10 |
Control panel shows E10, generator will not start in automatic mode
|
ATS Communication / Remote Start Signal Fault | View Details |
| E11 |
Generator shuts down with E11 after running under load for several minutes
|
Overcurrent / Output Overload Trip | View Details |
| E12 |
Control panel displays E12, generator shuts down immediately after start attempt
|
Low Frequency / Loss of Engine Speed Signal | View Details |
| E13 |
Generator displays E13 and refuses to start, especially in cold weather
|
Low Battery Voltage / Battery Protection | View Details |
| E14 |
Control panel shows E14, generator will not start on LPG/NG fuel
|
Gas Fuel Pressure / Regulator Fault | View Details |
| E15 |
Generator displays E15 and shuts down randomly during operation
|
Emergency Stop / Safety Circuit Activated | View Details |
| E16 |
Control panel shows E16, generator runs but frequency is out of range (not 60 Hz)
|
Frequency Out of Range / Governor Calibration Fault | View Details |
| E17 |
Generator control panel shows E17, unit will not enter AUTO mode
|
Configuration / Parameter Error | View Details |
| E18 |
Control panel shows E18, generator shuts down shortly after transfer to load
|
Reverse Power / Backfeed Detection | View Details |
| E19 |
Generator displays E19, engine cranks but stops without firing
|
Ignition System Fault | View Details |
| E20 |
Control panel shows E20, generator will not start and fuel smell is present
|
Flooded Engine / Excessive Fuel | View Details |
| – |
Black smoke from exhaust and strong fuel smell, engine lacks power
|
Rich Fuel Mixture | View Details |
| – |
Corrosion and rust visible on generator frame and electrical connections
|
Corrosion / Environmental Damage | View Details |
| – |
Excessive vibration of generator enclosure during operation
|
Vibration / Mounting Isolation Failure | View Details |
| – |
Generator battery repeatedly goes dead between outages
|
Battery Not Charging / Parasitic Drain | View Details |
| – |
Generator cranks but will not start, no error code displayed
|
General No‑Start Condition | View Details |
| – |
Generator emits loud popping sounds from exhaust and runs rough
|
Backfiring / Misfire | View Details |
| – |
Generator fails to run scheduled exercise cycle
|
Exercise Timer / Scheduler Malfunction | View Details |
| – |
Generator is leaking coolant from under the radiator or hoses (liquid‑cooled models)
|
Coolant Leak | View Details |
| – |
Generator is leaking fuel from the carburetor area
|
Fuel Leak at Carburetor / Fuel Bowl | View Details |
| – |
Generator makes high‑pitched whining or grinding noise from alternator end
|
Alternator Bearing Wear / Mechanical Noise | View Details |
| – |
Generator produces loud knocking or banging noise from engine
|
Internal Engine Knock / Mechanical Damage | View Details |
| – |
Generator runs but produces no AC power, no error code displayed
|
Loss of Excitation / Open Output Circuit | View Details |
| – |
Generator runs but some circuits in the house have no power during outage
|
Partial Power / Load Distribution Issue | View Details |
| – |
Generator shuts down after running for a while, enclosure feels very hot
|
Overheating Without Code | View Details |
| – |
Generator starts automatically during outages but does not transfer load
|
Failure to Transfer Load | View Details |
| – |
Generator starts then stalls after a few seconds, no code shown
|
Fuel Starvation After Start | View Details |
| – |
Generator will not start automatically during a utility outage, but starts manually
|
Automatic Start Failure (ATS Control Issue) | View Details |
| – |
Oil leaking under generator, small puddle forming on base
|
Engine Oil Leak | View Details |
| – |
Strong raw fuel smell around generator during operation
|
Fuel Vapor Leak / Incomplete Combustion | View Details |
| – |
Unusual burning smell or melted plastic odor from generator enclosure
|
Overheating Electrical Component | View Details |
| – |
Visible blue or white smoke from exhaust during operation
|
Oil Burning / Excessive Exhaust Smoke | View Details |
No matching codes found
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