How do you clear the FUS or FU5 message?

(All information here is copyrighted by Brian Keller, 2012).

Here’s the instructions for clearing the Irritrol RD-600 series sprinkler controller “FUS error” or “FU5 error” if it doesn’t go away easily.  (It’s usually caused by a shorted solenoid, wiring, or voltage surge, or controller circuit problem…) (Incidentally, FUS stand for Fuse, if you see a 5, it’s really an S)

General overview: The information below can help isolate the problem to being an issue with a valve, but keep in mind that the fuse message is often due to a problem with the system that we can repair.  Definitely use the troubleshooting information below to help determine if a valve(s) seems to be the problem.  If it’s not, just send it in for repair; we’re happy to help.

  1. Try clearing the FUS message using the instructions below and see if it comes back.
  2. If it comes back, check the fuse if you have one — here’s a link on how.
  3. If the fuse is good, and the message comes back,
    1. the suspected “problem valve” number will show up in the top of the LCD screen when the FUS message is displayed.
    2. Try removing the wire for that valve number and run the schedule again.
      1. If you have multiple numbers appearing, remove the wire for each of them, clear the message, and run the schedule without the valves connected.
    3. If the FUS message does not return with the wires disconnected, it’s likely a solenoid or valve wiring problem.  Reconnect the valve wires one by one until you find out which one causes the error to appear; this is your suspected bad valve/solenoid.
      Once identified, try swapping around the bad valve wires to another terminal and see if the problem “follows” the valve wire.  This will help confirm which one is bad. (The valve number shown with the FUS error will follow where you put that valve’s wire), If it follows the valve, check wiring and/or replace the solenoid.

      1. Solenoids are usually easy to replace, just turn the water off, disconnect the wires, unscrew the solenoid and replace it.
      2. You can get them from your local landscape supply store (E.g, SprinklerWorld, or other, but probably not HomeDepot or Lowes).
      3. If you want to pickup the parts first, take a picture of the valve to the store with you.
    4. If the FUS message returns with the same valve number even if you moved the valve to a new location, it’s unlikely that you’d have two solenoids fail at the same time and it is likely a circuit problem with the controller that we frequently repair; you can contact us here.

Set the dial to the Current Time position, press the + or – button

For full controller reset:
Older models can be reset by removing the battery and power from the controller – this may reset programming. Always try this method first, then the full factory default reset sequence.  All the details can be found in this DIY page: Reset Instructions
Newer models can be completely reset by doing the following.  This may remove all your programs:
1. While the controller is power-up, disconnect the
“Ribbon Cable” from the socket on the terminal board.
2. Disconnect the 9 volt battery.
3. Set the “PROGRAM” switch to “B”
4. Set the “MODE” Switch to Set Program (Middle) position between “OFF & RUN”.
5. Hold down the “MANUAL” button while reconnecting the ribbon cable.
6. Reset Current Time.
Important note: If the message keeps coming back and doesn’t appear to be a valve/wiring problem, it’s an indication of another real problem that we repair frequently.  Just let us know if we can help, you can reach us by going to the contact page.  We usually respond the same or next day.

18 thoughts on “How do you clear the FUS or FU5 message?

  1. Hello female here! This means help loll. I am a renter and trying to help a situation between the landlord and property management. We have a gcfi that I see is not working and wonder if that can be the issue with the box. The landscaper said that the sundial timer is broken and he can fix it but wanted a hefty bill and it didn’t add up. I checked the fuse as the fus(5) message was up and it’s fine. I reset the landscaping fuse in the main breaker box also. Please help I would like to fix this because it’s arizona and the plants are dying! It’s 120 degrees help!

    • Hello back at ya. if the GFCI is powering the controller, it could be the problem. If the GFCI is constantly tripped and you know it’s tied to the controller then you’ll have to fix that first. To know for sure, it’ll take some more questioning.
      I’m only available for the next day or two, so if you’d like to give me a call you’re able to be in front of the timer it would help. 623-252-2949, preferably between 7-8 AM or 6-9pm. We’ll get it figured out.

      Before calling, let me know the model number that appears above or below the Semi-Auto button of the controller. It’ll probably be an RD600 or RD600-R.


  2. I have the Irritrol 900, (06)…Display indicates FUS and the current time, flashing between each…Also, when trying to run in manual, after inputting a time and depressing “MAN”, the display goes to “OFF”…this happens regardless of the valve selection.

    • Hi Steve, thanks for posting. The problem you described is a classic symptom of a failing controller. I’d be happy to repair it for you if you’d like. I’ll drop you an email with repair details.

      Brian – aka the RainDial doctor

    • Hi Martin,

      You may have to provide more details – do you mean each valve is turning on at the same time? (e.g., valves 1,2,3,4,5,& 6 of a 6 station all come on at once?)
      There’s a DIY Irritrol RainDial troubleshooting menu on this site –

      Start there and look under that page for info about when valves come on when the are not supposed to and see if that helps. If you don’t have any luck, give me some more details.


    • Hi Issam,
      I don’t see an opn error with a normal rainDial timer, do you have a RainDial “Plus” module?
      The “opn” message indicates that the connection between the timer and the valves or motor is not connected. It could be a problem in the wire connections, back connector/terminal board, or the timer. I recommend you temporarily shut off power and remove the battery from the timer to reset it. Then, try running a schedule again and notice which valve causes the “opn” or open message. If it happens with every valve, it could be the pump.

      Basically, try to figure out which valve is giving the open message, then check the wiring for that valve closely for a bad connection.

      If you cannot find a problem, you can follow the “Removal instructions” page and send me the controller and timer module for repair.

      Let me know what you find,

  3. Hi. I have an RD-600 controller (just replaced one that went bad after a number of years) and am getting the dreaded FUS message (FUS 5). I switched the wire for the bad circuit from 5 to 6 and now get FUS 6, so I don’t think it’s the controller. I replaced the solenoid on the valve that I’m pretty sure is the one at fault (it’s the drip irrigation valve, and all the others work fine) but that didn’t help – I still get the FUS 6 message. Is it likely to be bad wiring within the value itself? Thanks.

    • Hi Craig,

      It seems like you’ve been through the entire system by now. I’d agree with your assessment. The FUS problem is something I repair frequently; I’d suggest sending it in. I repair that problem and also replace other parts that frequently fail in the first 5-10 year so it’ll be better than new.
      If you’re interested, just send it in – the “How to get it repaired” menu option has all the details, or drop me a note using the contact form.

      thanks for posting,

    • Hi Tom,

      Look on the DIY page – you’ll see an item that mentions OFn or OF followed by a number. That’ll tell what the message means on the Irritrol RD600 series controllers and how to deal with it.

      Thanks for posting,

  4. Perfecto, amigo!

    Thanks for the pertinent and well-founded advice!

    One suggestion: Rain Dial should consider adding a “RESET” button!


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