MemberApril 27, 2015 at 7:47 am
Had a call to a Stannah 260 over the weekend – F1 500mA fuse.
Replaced the fuse and everything is powered are ready to go but as soon as you put in a call (either direction – arm or remotes) the fuse blows – not a pcb fault as this was proven by substitution.
The fuse supplies power through to the Ultimate limit switch and on through the rest of the primary switches before becoming the common feed to the left/right call/sends.
My problem is if the fault was a short in the primary circuits then the fuse should blow instantly. But as the call/send circuits are identical but separate would they both develop the same fault?
Ultimately I went through the wiring measuring for shorts to chassis on each of the plugs without any unexpected results. Put it all back together, and the fault has gone! I’m not happy to just leave it at that as it may reappear in time.
So any ideas?
MemberApril 27, 2015 at 4:01 pm
Sounds like a wire in the one of the chair looms could be intermittently going to ground, most likely the loom that goes through the boss assembly??? sounds like one of those pain in the ass faults that may not happen again for months and then you will get it twice in a week!!
MemberApril 27, 2015 at 11:10 pm
yes, it does, just the fact that it’s not blown the fuse till a call goes in. In either direction – if it had only been one direction it would have been a little more logical!
MemberApril 30, 2015 at 9:17 pm
If its a sarum seat check the looms at the base of both arms. Sounds like either the white or orange wires are finding earth.
MemberMay 7, 2015 at 8:10 am
I have had the exact same fault, it was as others have suggested the loom at the base of the arm. I stripped it and could see the cable occasionally going to earth when moving the arms up/down
MemberJune 6, 2015 at 8:27 pm
Common feed to the chair push or joystick shorting to earth. Unplug all wagos from ecu and check each wire with an insulation tester as a normal meter may not pick it up.
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