Maker Pro
Maker Pro

Motor controller problem

altafmirza988

Jun 8, 2015
1
Joined
Jun 8, 2015
Messages
1
Hi everyone.
Recently I got running machine with fault and trying to repair it. It switches on and everything seems to work fine (all the settings apart from motor) but when I press start button motor does not start and mcb switches off after few seconds showing E1 error on upper pcb. (E1 indicates motor or mcb problem). After pressing start button, LED (next to big capacitor) goes on. I have 300vdc on motor pinouts with motor disconnected but after few seconds it cutts off showing E1 error. When I connect motor I have about 6vdc and motor does not start showing E1. I have tested motor using 12vdc psu (as advised on some websites) and motor was working. I already replaced thyristor, IGBT and rectifier but still the same problem Any ideas where to start please?
 

Martaine2005

May 12, 2015
4,932
Joined
May 12, 2015
Messages
4,932
Hi, I am going to anticipate the questions you will be asked by the experts on here.
What model running machine. And to post a clear picture of both sides of the circuit board you are repairing.
 
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