Systemair SAVE VTR 300/B L - reason for "Rotor alarm"

"Rotor alarm" is caused by faulty relay.
How to fix it video: • How to fix Systemair S...

[@andycornish6612]

A late reply for anyone searching same problem. I have two VTR300, both were showing rotor faults. In my case it was a simple change of the reed switch. Every time the drum spins a magnet passes the reed switch and switches it closed. After 1000's of cycles the reed switch develops high contact resistance and becomes intermittent which confuses the controller sending it into fault mode. It is a 10 minute procedure to swap. You will get little help from System Air in identifying a replacement part, so this is part I used which comes in the same plastic housing with same lock screws. Set the gap 5-10mm. Gentech PS811 which I bought from Farnell (part number1006787). About £15. Now running fault free.

[@thanhnguyen-ky2yf]

Thank you so much, it did help me!!!

[@Shivan149]

Hi @stenlindvest508, how did you get that plug off in the first seconds of your video "rotor motor noise fix"? Just pull? I fear damaging it.

[@bjarneball]

Hei Jeg har denne modellen og nå har jeg fått rotoralarm for andre gang siden anlegget ble installert for 4,5 år siden. Når modellen har så tydelig svakhet som den har (naboen har også hatt alarm, du har, andre har), burde det ikke være mulig å lage en gruppesak og kreve at leverandør bytter anlegg til ny modell?

[@salemkhalifa6675]

Helt enig med deg. Har hatt samme problemet idag for 2. Gang

[@kenteriksen1191]

Hello Sten. This happens to me with the VR-400 DC version. Have not had any service man over yet but on phone he want to change the whole motor. What do you think? Anything i can do instead?

[@r0sbach]

Hei! Jeg skal bygge nytt hus, og har fått et tilbud på denne VTR300 som balansert ventilasjon. Ville du anbefalt denne til noen? eller har du hatt mye problemer?

[@stenlindvest508]

Hello! I have an old model of VTR 300/B. New model should have different type of electrical main board and it is probably more reliable. I have had this relay problem already two times. I would recommend this machine if you get new (latest) model.

[@r0sbach]

Thank you for the reply! I will check if they have updated this model so i hopefully dont get the same problems :).

[@mariusjacobsen5164]

I dont have this cover, the only way to make my ventilation system work is to turn the fuse off and on but still i have to do this alot

[@sanin4ik]

Good day! I have same problem. What was your way to fix it? is it replacing relay? Thanks!

[@stenlindvest508]

Hello, I replaced the whole main board. I got new from reseller.

[@sanin4ik]

@@stenlindvest508 Will contact mine then. Thanks and Merry Christmas!

[@NinJaFLiPP2k]

Jeg får opp rotoralarm på skjermen men rotoren går. Hva kommer det av og hvordan fjerner man denne alarmen? Rotoren fungerer jo

[@archanaparmar9680]

Hi Sten, I see that you have done a lot of workaround with rotor motor and system air. I have issue with rotormotor making noise. Need your guidance and assistance. Is it possible to have a chat with this regards? Thanks in advance.

[@stenlindvest508]

Hello! Noise problem can be probably fixed by changing capasitor of motor. I have ordered 10pcs. from Amazon and try to fix this problem soon. So as you see I have also noise problem now :) www.amazon.de/gp/product/B07PDS6CW1

[@archanaparmar9680]

@@stenlindvest508 Thankyou for your quick response. Here is the link to issue. kzbin.info/www/bejne/jKWpfKaFoM-Vf7s. Could you please have a look at it and suggest? Many thanks for the help.

[@stenlindvest508]

@@archanaparmar9680 You have little bit different rotor motor, but the sound seems to be the same like mine. Try to change capasitor of the motor if you can. It would be cheaper solution for some time :). New motor could be over 100€. You need to clean the rotor surface and belt from dirt also. It reduces sound level as well.

[@archanaparmar9680]

@@stenlindvest508 Thankyou. Do you know where is capasitor located? Need to take it out and order same type, right?

[@stenlindvest508]

@@archanaparmar9680 Could you send me the photo of the label on motor and also it would be good If you can unmount backside cover of motor and see what shape of capasitor you have there? [e-mail]

[@nikolaigustavsen6501]

Hello, I also have a rotor alarm on my VTR 300/B. I did the same as you did in the video and it started working again. But I guess it will stop working soon?

[@stenlindvest508]

In the video I showed that the rotor relay is faulty. When I tapped on it, the rotor started working. See my other video where I connected the relay using cables. Now it is very easy to change if something happens to the relay.

[@innorway9387]

Hello. How to fix this ?

[@stenlindvest508]

Hello! You can find a solution in this video kzbin.info/www/bejne/eqCqmaJve7Otf5o