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Turning on heaters causes 15A fuse to blow
Posted: Mon Jun 10, 2019 4:41 pm
by chrisnasulea
Hello everyone,
I've just moved to a new house and brought my I3 Pro C with me. It was working perfectly before the move. The first time I tried to turn it on after hooking everything up it blew one of the 15A littlefuses on the board. I replaced the fuse, tried to turn on the heater for extruder 1 manually from Repetier Host and the fuse blew again.
I looked at various forums but I couldn't find anything useful.
Any thoughts?
Re: Turning on heaters causes 15A fuse to blow
Posted: Mon Jun 10, 2019 4:54 pm
by William
Hi, you can check if 1.the wiring on the motherboard is correct.
2. Whether the thermistor is detached or caused by poor contact.
Re: Turning on heaters causes 15A fuse to blow
Posted: Mon Jun 10, 2019 5:55 pm
by chrisnasulea
The printer was moved reasonably carefully from one apartment to the other so the wiring on the motherboard seems undisturbed.
Which thermistor are you referring to? There seems to be a bit of black colouring on the plastic surrounding the wires coming out of extruder 2. Maybe it was not there before, maybe it was.
- IMG_20190610_124535.jpg (278.55 KiB) Viewed 6710 times
Re: Turning on heaters causes 15A fuse to blow
Posted: Mon Jun 10, 2019 6:15 pm
by William
About the wiring of the hotbed and extruder and thermistor on the main board.
Re: Turning on heaters causes 15A fuse to blow
Posted: Thu Jun 20, 2019 9:35 pm
by _kaktus_
Hi chrisnasulea.
I haven't seen you here in a long time.
It's a pity you only look when you're forced to.
William is right about the 15A fuse circuit, there must be a short circuit somewhere.
Your observation can be helpful in diagnosing a fault.
First try to disconnect this circuit and check whether the fuse will be blown again. If not, you already know where to look for a fault
