Jump to content

QSF 430L3 Relay board issue


dwijadas

Recommended Posts

Hi,

I have a burnt relay board of QSF 430L3. I have very little knowledge on them; I have attached pictures of the burnt board. pls check.

I am not sure which parts caused the heat that even the copper connector is melted in that area ?  I got extra SSR, I want to make sure if anything else is causing those SSR to heat up before I replace them.

Any tips/info on this will be highly appreciated.

thanks,

Sena

Link to comment
Share on other sites

This is quite common and is caused by the connection to the SSR failing due to the solder being old. If you have a spare SSR you should be able to cut away the carbonized board and rewire the copper tracks using some insulated copper wire. Cut out all the burnt area and check the other solder joints on the other SSR's before you reinstall the board

Link to comment
Share on other sites

I agree with moffy.

Because the SSR's are quite big and are not supported, due to vibration the solder joints eventually crack, and then start to ark which then generates heat and burns the board.

It's a good idea to remove the board say every 3 years and check all the solder joints are ok.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...