Is there significant vibration at the site, causing the instrument wiring terminals to loosen frequently?
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The compressor experiences significant vibration at the installation site; after operating for some time, the temperature-related wiring terminals become loose, especially those on the motor side. This problem occurs quite often. I was wondering if any other users in this forum have encountered such an issue? How to deal with it? Is there a one-time solution?
This kind of problem has never occurred; you can move the junction box to a place with less vibration or to a place where there is no vibration at all.
What is the spring washer on the strain relief nut for? You haven’t removed it, have you!
It is recommended that when selecting the temperature terminals on the motor itself, attention should be paid to their quality; moreover, if they are of the terminal type, spring washers must be used to prevent loosening.
It hasn’t happened; what kind of vibration could there be? There are no spring pads either. As the two people upstairs said, they should be there
1. Spring washer. 2. Connect the two wires directly; if that doesn’t work, weld them together
It might be resonating with the housing or casing. You can use the unit’s temperature probe and connect it in a location where there is less vibration, or you can simply twist the two wires together and then weld them
1. Switch to O-shaped wire lugs; after securing the screws, fix them in place with silicone glue. 2. Connect the wires directly by using 4.0-sized wire lugs to clamp them together, or weld the two wires together using a soldering iron
In addition to the method mentioned by Haiyou above, there is another approach that can be tried. During parking for maintenance, the terminal blocks inside the wiring box are removed. Rubber spring washers or paper rings can be placed behind the screws that hold the terminal blocks in place, or other solutions can be used; it is also possible to leave the terminal blocks floating, with the aim of slowing down and reducing the vibration frequency transmitted from the machine itself to the terminal blocks.
Is the thermometer wire plugged into the terminal holes of the thermometer and secured with a screw rod? Still on top of the screw head? I’ve encountered this before as well; when it’s inserted into the hole, there can sometimes be poor contact. Later, it was all changed to being pressed onto the screw heads, and hardly any loosening occurred. If it is a flexible cable, a Y-shaped or O-shaped connector is needed. If it’s a wired connection, just bend it by yourself.
Rival! 10th floor **What a wise choice!** Use an O-shaped wire nose to tie the wire. 10th floor **What a wise choice!** . .