ABB ACS800 Common Fault Codes – Summary

ABB’s ACS800 Variable Frequency Drive is powerful AC drive that can handle applications from 0.75 to 7500 horsepower with ease. Advanced harmonics mitigation technology provides a cost efficient solution to meet your most stringent power quality standards.

The ACS800’s highly flexible, highly programmable platform makes integrating the drive into just about every drive-motor application you can think of a breeze. The drive’s “Everything Inside” design makes it fantastic “plug-and-play” tool, but the drive really shines when it is tailor made for your most precise applications. The drive is suitable for use in process industries such as pulp and paper, metals, mining, cement, power, chemical, and oil and gas. The ACS800 can even be found powering offshore supply vessels in the Gulf of Mexico!

Because the ACS800 is such a valuable tool, it can be a headache when something goes wrong. With dozens of fault codes to parse and diagnose, it may be difficult to identify where your drive is encountering issues. To help you diagnose issues you’re having with the ACS800, we ran a five-part series covering the most common fault codes encountered on the drive.

Below you will find a list of each fault covered in the series, a brief description of each fault and a hyperlink to each part in the series. We encourage you to read each part in full, as they include important information on possible causes, troubleshooting techniques and suggested resolutions for each fault.




Part 1 – DC Overvoltage and Supply Phase

  • DC Overvoltage – The drive will display “DC OVERVOLTAGE (3210)” on the control panel. This fault occurs when the intermediate circuit DC voltage exceeds a certain trip point. This trip point varies, depending on the whether the drive is 400 or 500 V unit.
  • Supply Phase – The drive will display “SUPPLY PHASE (3130)” on the control panel. This fault code indicates an oscillating Intermediate DC BUS circuit voltage, typically caused by a missing phase, blown fuse or rectifier bridge fault.


Part 2 – Motor Phase and Underload

  • Motor Phase – The drive will display “MOTOR PHASE (FF56)” on the control panel. When the drive detects a motor phase fault, it is indicating a lost phase due to failure in the motor, motor cabling or within the drive itself. A mistake at parameter 30.16 may also cause the fault to trigger.
  • Underload – The drive will display “UNDERLOAD (FF6A)” on the control panel. This fault indicates that the motor load is too low, typically due to a problem in the driven load. A release mechanism may have been engaged, or airflow is restricted in the case of an HVAC blower.


Part 3 – Control Board Temperature and Slot Overlap

  • Control Board Temperature – The drive will display “CTRL B TEMP (4110)” on the control panel. This fault occurs when the control board temperature exceeds its max rated temperature, or 88°C. The drive will shut down to prevent catastrophic failure.
  • Slot Overlap – The drive will display “SLOT OVERLAP (FF8A)” on the control panel. This fault means the drive has two option modules operating with the same connection interface selection. The fault triggers when these modules conflict with each other.


Part 4 – Analog Input and Short Circuit

  • Analog Input < Minimum Function – The drive will display “AI < MIN FUNCTION (8110)” on the control panel. This fault indicates that the analog control signal is below the minimum allowed value. The fault is typically triggered by an incorrect signal level or a failure in the control wiring.
  • Short Circuit – The drive will display “SHORT CIRCUIT (2340)” on the control panel. This fault means the drive detects a short in the motor, along the motor cables or at the output inverter bridge.


Part 5 – Overcurrent and Heatsink Temperature

  • Overcurrent – The drive will display “OVERCURRENT (2310)” on the control panel. This fault triggers when the output current suddenly exceeds the trip limit. The limit is at a fixed point – 200% the drive’s rated output current. Generally, the motor load is at fault here.
  • Heatsink Temperature – The drive will display “ACS800 TEMP (4210)” on the control panel. This fault triggers when drive’s IGBT reaches its maximum rated temperature. The drive may not be able to handle the motor’s power, or the environment is simply too hot. In any case, this fault will shut down the drive.


If you have any questions about the ACS800 or drive fault codes, contact our experts today!


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    • The 7583 fault displays on the ACS850; we couldn’t find it on the ACS800. Do you have more information? If you have the ACS850, this code indicates that you drive-to-drive link configuration parameters are incompatible. You’ll need to verify your parameters in Group 57.

    • 2330 indicates Earth Fault on the output. Disconnect the motor and see if it will run open loaded, or if the fault changes to something else like output phase loss. You’ll also need to check the motor and motor with a megger to determine if you have a motor problem here. If its measures less than 10 megohms then you have a motor problem. Measures greater than 10 megohms? Than this may not be the cause of the Earth Fault and you’ll need to have the drive repaired.

      Reminder: disconnect the motor from the drive before you test with the megger to protect your equipment.

  1. Hi! on a ABB ACS800, we have this fault:
    2085 NC DC busbar Undervoltage ride through alarm (on the big display)
    +SC INV 4V (2340) – on Inverter Display.
    Can you help us, please?

    • So for the 2340 fault, this indicates an output short circuit fault. If you pull the motor leads and still get the fault when you run the drive, you’ll have to send your drive out for repairs.

      We are still looking into 2085 ride through fault, but it sounds like a problem with your line power. Some drives have the ability to keep running if the input line shuts off completely by going into decel mode to keep the bus charged. So depending on the amount of inertia in the load, the motor coupled to the drive can ride through input power loss for several seconds, even minutes in large HP applications.

      We’ll continue looking into the 2085 code but it’s most likely not a drive problem but an issue in your power system.

    • UNDERVOLTAGE is actually fault 3220. Check main input for all the phases and fuses, and if those check out then check the input rectifiers in the drive to see if the fault occurs there.

    • We’re having trouble finding this fault in our manuals for this drive. We would recommend calling ABB for assistance here at 800-HELP-365 or 262-785-3200.

    • The 5210 fault is a PPCC fiber optic link error to a board internal to the drive. If RMIO is powered externally you need to make sure the power supply is on. See parameter 16.09 to check for this. Also check to make sure all internal fiber optic cables are intact and seated. If everything looks ok, but parameter 3.19 doesn’t show any signals active, you will want to contact us directly.

  2. Morning. I have un fault (3130) Supply Fase, on ACS 800-11-100-7. With motor disconnected, e after supply line on, then make the start from pannel , the inverter is in fault. i have cecked all the components : resistor of charcing, diode, main contactor, ijbt line- and ijbt motor. I have also changed the impulse-card GINT, and the two control card RMIO-12, the two module RDCO-03 with optical fiber, an the another optical fiber but the problem is the same. I think that the ijbts bridge -line, is ok, because, not is current ( motor disconnected ). Thanks

    • You will need to check the input line fuses, or measure the line amps on each phase while running to see either of those are too low. This is a line power problem unless one of the IGBT’s is open or a gate pulse is missing.

  3. Hi. I have a ACS800-0020 drive that shows a “INV CUR LIM” warning. As it powers down it flashes a “DC BUS LIM” warning and then faults to a “DC UNDERVOLTAGE” fault (3220). My inputs show voltage at 389V between legs on a 380V system. Outputs are all over the place from 265V down to open leg. HZ are also showing on the display from 55 up to 88. System is also running two other ACS800-0070 drives that are running fine. Any help would be appreciated.

    • You cannot measure the output of a PWM type drive with a meter without proper filtering, or your measurements are going to jump all over because there are 2 different frequencies superimposed on one another. The undervoltage fault when powering down is not a concern. However for the other faults, double check the voltage settings in menu 99 & 98 if you haven’t done so already.

  4. Kindly assist
    acs 850-04-61A
    This drive is showing the following fault when switched on
    ACSM1 Speed
    ACSM1 motion
    ACS 850
    ACS 850 FA
    ACSM1 Regen
    only up and down scroll keys are functional on the keypad.

    kindly assist

  5. We have ACS 800 ABB VFD its showing fault code 04 ( Short circuit) we checked the motor and cable by IR and WR. Its perfect. Please let me know how we can run the ACS 800 without motor.

    • If your motor checks ok and you want to run the drive without the load/motor connected, you will have to make sure the drive is in SCALAR mode at parameter 99.04 first.

    • This is a “PPCC LINK xx” which is an internal optical link error. Check optical cables inside drive to make sure all are connected. You may have to contact our repair service team or ABB tech support if nothing is found unplugged.

    • This is a Ground fault, make sure the motor wiring is not longer than the maximum length allowed. Also try disconnecting the motor leads if the length is good, to verify fault will clear. If the fault persists without a motor, the problem could be missing input phase.

  6. Dear sir,

    I have 250KW ABB VFD drive and it is under breakdown.

    MODEL – ACS850-04-521A-5+J400
    S/N – 1114004628

    fault code is – 27.
    what the meaning of it and how could i resolve the same.

    Please reply asap.

    • Connection between the JCU Control Unit and the power unit of the drive is lost. You’ll need to check the connection between both units, and you’ll need to check parameter 95.01, which selects how the control unit is power.

    • If ambient temps are okay, check the motor power against the drive’s rated power. If the load is too large the drive’s internal IGBT will still get too hot.

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