I've made a complete Generac error code guide now in PDF format with some other useful information in there for anyone who wants to keep a copy on hand as well! You can download the PDF version of this guide here: images/Generac-Error-Code-Fault-Guide-eCodes.pdf
Having read others' reports about this issue requiring a firmware update to solve, why, after five years, would this issue occur on a 14KW with an Evolution controller, when there's nothing wrong with the fuse and it's worked successfully for that period of time? Actually first occurred one day after the unit's fifth birthday!! When the firmware is proprietary to Generac, it seems strange that. Please paste your code into the box below: OK Cancel. To access the dealer menu/maintenance reset from the main menu press esc, up, up, esc, down, up, esc, up, enter. You can then navigate to the dealer edit menu. Additionally, what is error code 1505 Generac? The error code 1505 is a RPM loss alarm and will trigger a shutdown anytime it occurs and will not self clear.
This is a list of the Generac Evolution e-Codes (alarm codes) that you may see on the display. Under each is a brief description of what the problem is and the possible causes.
If you need more help, please post a new topic with your particular information so that we can help! Make sure to include as much information as possible about what the installation looks like and what the problem is and when it occurs.
PLEASE NOTE THAT THIS 2018/2019 UPDATED LIST WAS CUSTOM WRITTEN BY ME (CHRIS FLAGG), FOR THIS SITE AND IF SEEN ELSEWHERE WAS COPIED FROM THIS ORIGINAL POST...THIS LIST IS NOT TO BE COPIED WITHOUT WRITTEN PERMISSION
Controller Fault
ALARM
The controller has an internal problem and should be replaced. No error code number is given for this fault.
Overcrank 1100
ALARM
This is a more common error code. Basically this means that the controller is telling the engine to start, but it cannot start for some reason. The controller has verified that the engine is actually cranking, but not starting. This is most likely fuel or maintenance related... Check to make sure that the fuel supply is on and if on LP gas, the tank is not empty.
Overcrank 1101 (This ONLY pertains to 8 & 9kW units)
ALARM
The controller has limited the number of starts at 10 to prevent damage to the starter. Fuel and maintenance related items should be checked. Valves are normally a culprit of overcrank alarms...
Overspeed 1200
ALARM
This overspeed e-code is for prolonged overspeed (Hz is over set threshold). This means that for 3 seconds, the frequency (engine speed) was 72Hz or above on a 60Hz unit or 60Hz or above on a 50Hz unit (not a US unit). Most likely cause is a stepper motor or mixer assembly issue. Could have come unplugged, become jammed or anything else that may increase engine speed.
Overspeed 1205
ALARM
This overspeed e-code is for instantaneous overspeed (Hz is over set threshold). This means that the frequency (engine speed) was very high. 75Hz or above on a 60Hz generator, or 62Hz or above on a 50Hz model (again, not a US generator). The same causes as the above overspeed code. Stepper/mixer problems.
Overspeed 1207
ALARM
This is an uncommon overspeed alarm and is a backup to the normal overspeed monitors. This monitors the zero cross timing of the voltage regulator (AVR) to determine the alternator frequency. It's set for 150 Milliseconds of 4500 RPM or higher. It's only used if the normal ignition pulses are not seen by the controller from the 18 wire.
Low Oil Pressure 1300
ALARM
This is the normal shutdown alarm for low oil or low oil pressure and may be caused by a couple of things: 1. The oil level is low and should be checked and filled as needed (most common during extended outages). 2. The low oil pressure (LOP) switch is faulty and the oil pressure should be checked and the switch replaced. 3. Some internal problem with the engine not building oil pressure. This would require an oil pressure test to verify.
High Temperature 1400
ALARM
The high engine temperature switch has closed and shut the unit down for exceeding the engine temp high limit. The unit should be checked for debris blocking the vents that might be restricting airflow. If nothing is found, the high temp switch and its wiring should be checked.
RPM Sensor Loss 1501
ALARM
This RPM alarm is set when a 2 cylinder unit was already running and stalled or lost the RPM signal from the ignition coils. Possible causes could be a fuel issue, the LP tank is empty, 1 or both ignition coils are damaged, or the unit was overloaded quick enough that the engine stalled and set the alarm.
RPM Sensor Loss 1505
ALARM
This RPM alarm is set when a 2 cylinder unit is cranking. It's caused when the controller told the engine to crank, but did not get a signal back that the engine was actually turning. Possible causes are a dead or bad battery, bad starter or wiring to the starter, or ignition coil problems.
RPM Sensor Loss 1511
ALARM
This RPM alarm is set when a single (1) cylinder unit was already running and stalled or lost the RPM signal from the ignition coil. Possible causes could be a fuel issue, the LP tank is empty, ignition coil is damaged, or the unit was overloaded quick enough that the engine stalled and set the alarm.
RPM Sensor Loss 1515
ALARM
This RPM alarm is set when a single (1) cylinder unit is cranking. It's caused when the controller told the engine to crank, but did not get a signal back that the engine was actually turning. Possible causes are a dead or bad battery, bad starter or wiring to the starter, or ignition coil problems.
Underspeed 1600
ALARM
An e-code that's triggered when the engine speed is slowed to 55Hz for a 60Hz unit for 30 seconds (or 40Hz for a 50Hz unit). Most likely problem is that the unit is overloaded or something has tried to turn on that overloaded the unit. Could also be fuel related or a stepper motor throttle control problem .
Underspeed 1603
ALARM
This alarm is triggered when the engine never came up to its rated 3600 RPM speed during startup. Stepper motor and the fuel system should be checked for problems. Make sure the orange fuel selector knob is set to the correct fuel.
Overvoltage 1800
ALARM
Generac Error Codes List 2017
The alarm is set when the unit's rated voltage output is exceeded for a prolonged period of time. A voltage test should be done to determine the problem. Most likely a bad AVR (automatic voltage regulator) which is internal to the Evolution control board
Undervoltage 1900
ALARM
e-Code is displayed when the output voltage is below 80% of the unit's rated output for 10 or more seconds. Please note that if the installed firmware is below version 1.12 you should update the firmware before going further. Frost or debris on the slip rings can cause a bad connection to the brushes where version 1.11 and below would shut the unit down before attempting to 'clean' the slip rings during running. Version 1.12 and above will run the unit with excitation voltage for 4 minutes before shutting down for undervoltage.
Undervoltage 1901
ALARM
A sudden drop in voltage will set this alarm. This can also occur during a stall condition which may be fuel related and can throw troubleshooting in the wrong direction. All engine functions should be checked as well as voltage. Causes could also be a stator or rotor problem, brush problem, unit being overloaded, or wiring problems. Firmware v1.12 or higher should also be installed before going further.
Undervoltage 1902
ALARM
Fault is displayed when both zero crosses are missing from the controller's input for 1.5 seconds or more. Could be a faulty excitation winding, zero cross circuit, loose wiring, or field boost hardware problem. Same applies here, v1.12 or later firmware should be installed.
Undervoltage 1906
ALARM
Same basic alarm as above, however only 1 zero cross is missing for 1.5 sec instead of both. See Undervoltage 1902 above for causes and troubleshooting.
Wiring Error 2099
ALARM
The controller's wiring on the customer side is most likely miswired. This is normally caused when the high and low voltage wiring connections (194, 23, N1, N1 and T1) are confused during the installation. Normally this alarm won't appear after the initial install since that wiring doesn't normally change after the installation.
Overload Remove Load 2100
ALARM
Alarm is triggered when the unit is overloaded and the internal CT (current transformers) detected an overload condition. This should be 1 or both CT's that detected the problem. The loadshed modules (if in use) should be checked, load should be removed, or load shedding should be installed to prevent the overload from happening.
Overload Remove Load 2102 (This ONLY pertains to 8 & 9kW units)
ALARM
The unit re-cranks 5 times, when load is applied the engine stalls (0 RPM) and has low output voltage (< 180VAC) The unit is most likely overloaded and load should be removed to prevent damage. Inspect the stepper motor and linkage to make sure it's not binding or stuck. Also check for fuel problems such as pinched fuel lines.
Overload Remove Load 2103 (This ONLY pertains to 8 & 9kW units)
ALARM
The unit has attempted to run and accept load 10 times and could not due to an overload condition. Check connected loads for overloading. See above overload alarms for other troubleshooting...
Undervoltage Overload 2299
ALARM
The unit was overloaded and attempted to start with a large load still connected to the generator. The generator cannot ramp up the generator output to normal with a large load connected. The main breaker inside the generator or in the gray door on the side should be turned off while the unit is started and then once up to speed and steady, the breaker can be turned back on to re-connect load. If the engine struggles to accept the load, items should be turned off to decrease the load on the generator. This would only be something that would occur during an ongoing outage where the transfer switch was still connecting the load to the generator.
Stepper Overcurrent 2399
ALARM
The current flow measured in the stepper motor circuit was above spec. Check the stepper motor for operation and check resistances of the stepper coils.
Fuse Problem 2400
ALARM
Missing, blown, or damaged 7.5A ATO type fuse in the controller (located under the rubber USB port flap on the top of the Evolution Controller). This alarm was flashed out of the programming on versions 1.12 and above. If you see this alarm, upgrade the firmware in the controller to a current version (1.20 as of writing this)
Aux Shutdown 2800
ALARM
This only pertains to units with an external shutdown switch or switches installed. New WiFi units come standard with these switches, some (15kW and above) with 2. One located on the back side of the unit and one inside on the firewall. They must be on for the unit to run. If they are both on, check the wiring and connections for problems.
Generac Error Codes List
Low BatteryWARNING
The warning is triggered when the battery voltage drops below 12.1 volts for 60 seconds or more. Charger output should be checked as well as the battery should be load tested once charged. Battery could be bad or charger could be faulty.
Battery Problem
WARNING
This warning is triggered when the battery voltage is more than 16 volts or more than 600mA of charge current is detected at the end of an 18 hour charge cycle. Battery should be removed and tested. If bad, replace. Note that as of writing this, the only way I know how to clear this alarm is by removing a battery terminal from the battery, and then unplugging the T1 2-wire white colored connector under the controller. This will power cycle the controller and reset the alarm. If it returns, further investigation into the controller may be needed.
Charger Warning
WARNING
Warning is displayed when the battery voltage is below 12.5 volts at the end of an 18 hour charge cycle. Battery should be tested as well as the charger. Note that as of writing this, the only way I know how to clear this alarm is by removing a battery terminal from the battery, and then unplugging the T1 2-wire white colored connector under the controller. This will power cycle the controller and reset the alarm. If it returns, further investigation into the controller may be needed.
Charger Missing AC
WARNING
This is a very common alarm to see during install if the battery was installed before the charger was powered on, or during a power outage where the unit isn't running for some reason. It's displayed when the T1 wire (120V power to the battery charger circuit in the Evolution controller isn't live) If power is out and the unit isn't running this alarm will be triggered since the battery charger is now not getting power from the house. Eventually the battery will die if left for several hours without a charger input. If this is a new installation, all of the control wiring should be checked to make sure that one or more of the wires isn't loose, transposed, or missing completely... The T1 fuse should also be tested. Another issue could be if the unit had a cold weather breather heater (model 7103) installed which is powered by the T1 wire. If the heater had a problem or is shorted and blew the T1 fuse, you will see this alarm.
Service Schedule A
MAINTENANCE REMINDER
Triggered at the 2 year mark (date from which the unit was powered on) or 200 hours, whichever came first. Proper maintenance should be performed. Valves should be checked at this point and will usually require adjustment.
Service Schedule B
MAINTENANCE REMINDER
Triggered at the 4 year mark (date from which the unit was powered on) or 400 hours, whichever came first. Proper maintenance should be performed. At 400 hours the valves almost certainly need to be adjusted, probably before this!
Color legend for this list:
Displayed Alarm message/Warning message
e-Code number
Description and possible causes/fixesNote this is a follow up on the post linked below where we installed an external battery charger on this Generac generator. The Battery Tender we installed has been working well for over 4 years using the same battery that failed twice using the factory charger!
https://fettricks.blogspot.com/2015/06/substitue-battery-charger-for-generac.htmlThe most recent issue with the generator was a failure to complete its weekly self test. Upon inspection the OVER SPEED error light was on. You could still run the generator in Manual mode and it sounded like it was running normally.
My research indicated that, in addition to a genuine over-speed condition, this error can be caused when the sensor board doesn't have power so the sensor reading is not present, causing an erroneous Over Speed error. So I started looking for reasons that the sensor board might not be getting power. Let the sleuthing begin!
Danger Will Robinson! You should have a qualified generator service technician diagnose any issues with your generator. The voltage levels in the generator and associated switch gear are lethal. Forgetting to disconnect the power or touching the wrong spot at the wrong time can and will kill you. It is too easy to forget that you closed a breaker a few minutes ago. Really, have a technician do the work on your generator.
My research indicated that, in addition to a genuine over-speed condition, this error can be caused when the sensor board doesn't have power so the sensor reading is not present, causing an erroneous Over Speed error. So I started looking for reasons that the sensor board might not be getting power. Let the sleuthing begin!
Danger Will Robinson! You should have a qualified generator service technician diagnose any issues with your generator. The voltage levels in the generator and associated switch gear are lethal. Forgetting to disconnect the power or touching the wrong spot at the wrong time can and will kill you. It is too easy to forget that you closed a breaker a few minutes ago. Really, have a technician do the work on your generator.
Generac Generator Error Code List
Safety first, this meant putting the generator in OFF mode and turning off the power to the house. Even then I pretend that every circuit is still live and avoid touching any conductors. Belt AND suspenders type of caution is the only way to go when dealing with electronics that can kill you!
When everything was off, I open up the generator's electrical panel and the transfer switch panel to look for obvious issues like disconnected wires, loose wire terminals and blown fuses. I got luck and found a blown fuse in the top of the transfer switch. There had been thunderstorms in the area shortly before the generator failed it's first weekly test.
Fuse on Amazon
Fuse Puller on Amazon
The fuses arrived quickly, thank you Amazon, and I repeated the process of turning the generator off and turning off power to the house. I then used the fuse puller to remove the old fuse and install the new one. To be honest, I also wore rubber gloves when working with the fuses. Never bet your life that a power circuit is actually off.
We reconnected the house power, set the exercise time and the generator ran fine. It has now been over a year since the fuse was replaced and the generator has not missed a weekly self-test. It has also automatically started several times during actual power outages. And we still have a spare fuse!
Preview
I am doing some early testing for a battery voltage monitoring system that I put together for this generator. Below is a graph showing the battery voltage during the generator's weekly exercise. Here you can see the battery voltage drop during starting, then the voltage begins to recover while the generator is running and then the battery is topped off by the Battery Tender before dropping back to the standby voltage. I can also configure the system to send me an email or SMS when the voltage drops below a specific voltage (generally this happens during starting so I am notified of start events). My goal is to be able to detect battery deterioration (and indicate that the battery needs to be replaced) before a failure to start occurs. It is also reassuring to see the battery charger topping off the battery following the weekly self test.