Siemens Standby Generators Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
Advertisements
F01
Generator will not start in AUTO mode; controller shows F01 and inhibits crank attempts.
Emergency Stop Active / E‑Stop Circuit Open
F02
Generator attempts to start but stops after a few seconds; controller displays F02 Low Oil Pressure.
Low Oil Pressure Shutdown
F03
Generator cranks but fails to start; controller shows F03 Overcrank after several attempts.
Overcrank / Failure to Start
F04
Generator shuts down shortly after starting; controller displays F04 High Engine Temperature.
High Coolant Temperature / Engine Overheat
F05
Generator shuts down and controller shows F05 Overspeed; engine revs unusually high just before shutdown.
Engine Overspeed Protection Trip
F06
Generator shuts down with F06 Underspeed; engine sounds loaded and slow before trip.
Engine Underspeed / Loss of Rated Frequency
F07
Controller displays F07 Low Battery Voltage; generator may fail to crank or cranks slowly.
Low DC Battery Voltage
F08
Controller shows F08 High Battery Voltage; DC voltage reading is above normal and alarms persist.
High DC Battery Voltage / Overcharge
F09
Generator will not transfer load; controller displays F09 Low AC Voltage.
Low Generator Output Voltage
F10
Generator shuts down or refuses to transfer; controller shows F10 High AC Voltage.
High Generator Output Voltage
F11
Controller displays F11 Phase Imbalance; generator may continue running but alarms and may refuse to transfer.
AC Phase Voltage Imbalance
F12
Controller shows F12 Frequency Out of Range; generator may not transfer to load.
Generator Frequency Fault
F13
Controller displays F13 Loss of Sensing; generator may run but will not regulate voltage correctly.
Loss of Voltage Sensing to Controller/AVR
F14
Controller shows F14 Emergency Stop Input Active even though E‑stop button appears released.
E‑Stop Input Fault / Short to Ground
F15
Controller displays F15 Oil Level Sensor Fault; generator may not start or may ignore low oil level.
Oil Level Sensor Circuit Fault
F16
Controller shows F16 Coolant Level Low; generator may not start or may shut down shortly after start.
Low Coolant Level Detection
F17
Controller displays F17 Fuel Level Low; generator may still run but alarms and may be configured to shut down.
Low Fuel Level Warning/Shutdown
F18
Controller shows F18 Fuel Pressure Low; engine may stall or fail to start.
Low Fuel Supply Pressure
F19
Controller displays F19 Intake Air Temperature High; generator may derate or shut down.
High Intake Air Temperature
F20
Controller shows F20 Exhaust Temperature High; generator shuts down under load.
High Exhaust Gas Temperature
F21
Controller displays F21 Generator Overload; output breaker may trip or controller may shed load.
Generator Overload Condition
F22
Controller shows F22 Ground Fault; generator may trip off-line.
Ground Fault Detection
F23
Controller displays F23 Utility Voltage Fault; generator may start unexpectedly or refuse to transfer back to utility.
Utility Supply Voltage Out of Range
F24
Controller shows F24 Utility Frequency Fault; generator may not transfer to or from utility.
Utility Supply Frequency Out of Range
F25
Controller displays F25 CAN Bus Communication Error; some functions may be disabled.
Controller Communication Bus Fault
F26
Controller shows F26 EEPROM/Memory Error; settings may not be saved and generator may not start.
Controller Non-Volatile Memory Fault
F27
Controller displays F27 Starter Fault; generator does not crank when start is commanded.
Starter Circuit Failure
F28
Controller shows F28 Crank Disconnect Fault; starter remains engaged too long or disengages too early.
Crank Termination / Start Sequence Fault
F29
Controller displays F29 Air Filter Restriction; engine may smoke or lose power.
Air Intake Restriction
F30
Controller shows F30 Service Due; generator continues to run but indicates maintenance is required.
Scheduled Maintenance Reminder
Symptom
Controller display is blank or unreadable; generator does not respond to button presses.
Controller Power or Display Failure
Symptom
Coolant puddle under generator or visible coolant dripping from hoses or radiator.
External Coolant Leak
Symptom
Generator cranks but will not start; no error code displayed on Siemens controller.
No-Start Condition Without Logged Fault
Symptom
Generator emits blue smoke from exhaust, especially under load.
Oil Burning / Excessive Oil Consumption
Symptom
Generator emits excessive black smoke from exhaust during operation.
Rich Fuel Mixture / Incomplete Combustion
Symptom
Generator emits white smoke or steam from exhaust, especially on startup.
Coolant or Unburned Fuel in Exhaust
Symptom
Generator enclosure shows signs of water ingress; moisture or rust visible inside cabinet.
Water Ingress / Enclosure Seal Failure
Symptom
Generator is excessively noisy or produces unusual knocking, rattling, or grinding sounds during operation.
Abnormal Mechanical Noise
Symptom
Generator produces voltage but automatic transfer switch does not transfer load to generator during outage.
ATS Fails to Transfer to Generator
Symptom
Generator runs but does not produce any AC output voltage.
Loss of Excitation / Dead Alternator Output
Symptom
Generator runs but frequency is unstable, causing lights to flicker or motors to run erratically.
Frequency Instability
Symptom
Generator runs but output voltage is unstable or fluctuates under steady load.
Voltage Instability / Poor Regulation
Symptom
Generator starts but immediately shuts down after a few seconds; no specific error code shown.
Run-Then-Stop Condition Without Logged Fault
Symptom
Generator transfers load but then drops out and re-transfers back to utility repeatedly (hunting).
Unstable Transfer / Hunting Between Sources
Symptom
Generator vibrates excessively during operation, causing enclosure panels to shake.
Excessive Vibration
Symptom
Strong exhaust smell or visible exhaust fumes inside nearby building when generator runs.
Exhaust Fume Intrusion / Venting Problem
Symptom
Visible fuel leak from generator base or fuel lines; fuel odor around Siemens standby generator.
External Fuel Leak
Symptom
Visible oil leak under generator; oil spots on pad or inside enclosure.
Engine Oil Leak
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| F01 |
Generator will not start in AUTO mode; controller shows F01 and inhibits crank attempts.
|
Emergency Stop Active / E‑Stop Circuit Open | View Details |
| F02 |
Generator attempts to start but stops after a few seconds; controller displays F02 Low Oil Pressure.
|
Low Oil Pressure Shutdown | View Details |
| F03 |
Generator cranks but fails to start; controller shows F03 Overcrank after several attempts.
|
Overcrank / Failure to Start | View Details |
| F04 |
Generator shuts down shortly after starting; controller displays F04 High Engine Temperature.
|
High Coolant Temperature / Engine Overheat | View Details |
| F05 |
Generator shuts down and controller shows F05 Overspeed; engine revs unusually high just before shutdown.
|
Engine Overspeed Protection Trip | View Details |
| F06 |
Generator shuts down with F06 Underspeed; engine sounds loaded and slow before trip.
|
Engine Underspeed / Loss of Rated Frequency | View Details |
| F07 |
Controller displays F07 Low Battery Voltage; generator may fail to crank or cranks slowly.
|
Low DC Battery Voltage | View Details |
| F08 |
Controller shows F08 High Battery Voltage; DC voltage reading is above normal and alarms persist.
|
High DC Battery Voltage / Overcharge | View Details |
| F09 |
Generator will not transfer load; controller displays F09 Low AC Voltage.
|
Low Generator Output Voltage | View Details |
| F10 |
Generator shuts down or refuses to transfer; controller shows F10 High AC Voltage.
|
High Generator Output Voltage | View Details |
| F11 |
Controller displays F11 Phase Imbalance; generator may continue running but alarms and may refuse to transfer.
|
AC Phase Voltage Imbalance | View Details |
| F12 |
Controller shows F12 Frequency Out of Range; generator may not transfer to load.
|
Generator Frequency Fault | View Details |
| F13 |
Controller displays F13 Loss of Sensing; generator may run but will not regulate voltage correctly.
|
Loss of Voltage Sensing to Controller/AVR | View Details |
| F14 |
Controller shows F14 Emergency Stop Input Active even though E‑stop button appears released.
|
E‑Stop Input Fault / Short to Ground | View Details |
| F15 |
Controller displays F15 Oil Level Sensor Fault; generator may not start or may ignore low oil level.
|
Oil Level Sensor Circuit Fault | View Details |
| F16 |
Controller shows F16 Coolant Level Low; generator may not start or may shut down shortly after start.
|
Low Coolant Level Detection | View Details |
| F17 |
Controller displays F17 Fuel Level Low; generator may still run but alarms and may be configured to shut down.
|
Low Fuel Level Warning/Shutdown | View Details |
| F18 |
Controller shows F18 Fuel Pressure Low; engine may stall or fail to start.
|
Low Fuel Supply Pressure | View Details |
| F19 |
Controller displays F19 Intake Air Temperature High; generator may derate or shut down.
|
High Intake Air Temperature | View Details |
| F20 |
Controller shows F20 Exhaust Temperature High; generator shuts down under load.
|
High Exhaust Gas Temperature | View Details |
| F21 |
Controller displays F21 Generator Overload; output breaker may trip or controller may shed load.
|
Generator Overload Condition | View Details |
| F22 |
Controller shows F22 Ground Fault; generator may trip off-line.
|
Ground Fault Detection | View Details |
| F23 |
Controller displays F23 Utility Voltage Fault; generator may start unexpectedly or refuse to transfer back to utility.
|
Utility Supply Voltage Out of Range | View Details |
| F24 |
Controller shows F24 Utility Frequency Fault; generator may not transfer to or from utility.
|
Utility Supply Frequency Out of Range | View Details |
| F25 |
Controller displays F25 CAN Bus Communication Error; some functions may be disabled.
|
Controller Communication Bus Fault | View Details |
| F26 |
Controller shows F26 EEPROM/Memory Error; settings may not be saved and generator may not start.
|
Controller Non-Volatile Memory Fault | View Details |
| F27 |
Controller displays F27 Starter Fault; generator does not crank when start is commanded.
|
Starter Circuit Failure | View Details |
| F28 |
Controller shows F28 Crank Disconnect Fault; starter remains engaged too long or disengages too early.
|
Crank Termination / Start Sequence Fault | View Details |
| F29 |
Controller displays F29 Air Filter Restriction; engine may smoke or lose power.
|
Air Intake Restriction | View Details |
| F30 |
Controller shows F30 Service Due; generator continues to run but indicates maintenance is required.
|
Scheduled Maintenance Reminder | View Details |
| – |
Controller display is blank or unreadable; generator does not respond to button presses.
|
Controller Power or Display Failure | View Details |
| – |
Coolant puddle under generator or visible coolant dripping from hoses or radiator.
|
External Coolant Leak | View Details |
| – |
Generator cranks but will not start; no error code displayed on Siemens controller.
|
No-Start Condition Without Logged Fault | View Details |
| – |
Generator emits blue smoke from exhaust, especially under load.
|
Oil Burning / Excessive Oil Consumption | View Details |
| – |
Generator emits excessive black smoke from exhaust during operation.
|
Rich Fuel Mixture / Incomplete Combustion | View Details |
| – |
Generator emits white smoke or steam from exhaust, especially on startup.
|
Coolant or Unburned Fuel in Exhaust | View Details |
| – |
Generator enclosure shows signs of water ingress; moisture or rust visible inside cabinet.
|
Water Ingress / Enclosure Seal Failure | View Details |
| – |
Generator is excessively noisy or produces unusual knocking, rattling, or grinding sounds during operation.
|
Abnormal Mechanical Noise | View Details |
| – |
Generator produces voltage but automatic transfer switch does not transfer load to generator during outage.
|
ATS Fails to Transfer to Generator | View Details |
| – |
Generator runs but does not produce any AC output voltage.
|
Loss of Excitation / Dead Alternator Output | View Details |
| – |
Generator runs but frequency is unstable, causing lights to flicker or motors to run erratically.
|
Frequency Instability | View Details |
| – |
Generator runs but output voltage is unstable or fluctuates under steady load.
|
Voltage Instability / Poor Regulation | View Details |
| – |
Generator starts but immediately shuts down after a few seconds; no specific error code shown.
|
Run-Then-Stop Condition Without Logged Fault | View Details |
| – |
Generator transfers load but then drops out and re-transfers back to utility repeatedly (hunting).
|
Unstable Transfer / Hunting Between Sources | View Details |
| – |
Generator vibrates excessively during operation, causing enclosure panels to shake.
|
Excessive Vibration | View Details |
| – |
Strong exhaust smell or visible exhaust fumes inside nearby building when generator runs.
|
Exhaust Fume Intrusion / Venting Problem | View Details |
| – |
Visible fuel leak from generator base or fuel lines; fuel odor around Siemens standby generator.
|
External Fuel Leak | View Details |
| – |
Visible oil leak under generator; oil spots on pad or inside enclosure.
|
Engine Oil Leak | View Details |
No matching codes found
Advertisements