Today we moved all the electronics in their final place with AO workstation.
After that we started testing the electronics simply switching on everything without the ASM connected in order to see if everything works or not and…
AAAAARRRGHHHH: one power supply seems not work. A strange noise like “clic-clic” at few Hertz appeared and in the meanwhile the MasterBCU is loosing power.
At this point we analyze what we knew about the status of the system:
- it was kept switched off for months so an hardware piece broken is unlikely
- it was perfectly working the last time in the clean room
- no one touched/refurbished it
- moreover the MasterBCU power supply is blinking as well.
Since we have one single phase from the three phase line supplying one single AC/DC power converter, the failure of the AC/DC power converter can be caused by something missing in the line. The MasterBCU behavior confirms that: his power come directly from the power line without passing from the AC/DC power converters.
So only one thing is really different from the clean room and the telescope…. THIS!
And here we found the problem: in the three phase wall box the NEUTRAL WAS MISSING so the system cannot work.
The telescope guys fixed it in a couple of hours and now everything works well!
OK! now next step connect the ASM and we will see….!