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21/03/2019 3:52 am
I have a 311 gem with a drive flashing !B1A
Also the fault on my service tool says precharge dc low
Can’t find what this means can someone help
Thanks
Also the fault on my service tool says precharge dc low
Can’t find what this means can someone help
Thanks
21/03/2019 9:07 am
After a full power down and reset of the MCSS, does the fault still exist?
23/03/2019 9:30 am
Whats the fault number?
23/03/2019 10:15 am
Most AC drives charge the DC buss through a resistance of some sort until it reaches a set voltage where the resistance is bypassed to fully charge the buss. Otis calls this precharge and once the parameter M1 pick V PU is reached, the M1 contactors in the drive picks to bypass the resistor and charge the buss all the way.
25/08/2022 12:13 am
Currently dealing with this same issue. I replaced the 4 capacitors as a starting point but to no avail. Any tips?
27/08/2022 8:32 am
The drive needs to be sent out for repair.
Last edited by Indirtwetrust; 08/27/22 12:35 AM.
28/08/2022 12:56 am
I can get these rebuilt. PM me with pics of data tag for quote.
29/08/2022 9:11 pm
Access electronics out of Waldorf MD does a good job on these. I have replaced several of these over the years.
301 -645-1733
301 -645-1733
05/09/2022 5:29 pm
!B1A
i need your help to solve this problem
There are almost no parts left on the power floor that we haven't replaced, but the fault continues.
i need your help to solve this problem
There are almost no parts left on the power floor that we haven't replaced, but the fault continues.