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4063 Laser gas or PSU alarm

4063 Laser gas or PSU alarm

(OP)
Hi friends,
I have AMADA FO3015NT Laser machine,
i found in last week : 4063 Laser gas or PSU alarm so i contact AMADA and the send fanuc Engineer they give me this report.

Date: 21.06.16
 Visited for 4063 Laser gas or PSU alarm. Customer observed fire from PSU-1 at time of high volt ready.
 Visited and cold check PSU-1. Found not ok during cold check. Check matching Box-1 and found burn mark
on main bus bar.
 PSU-3 already swapped to PSU-1 by AMADA. Today fitted matching Box-4 to 1 and taken trial. Found DCI3 LED
on during SEQ26.
 Confirm problem with PSU-1, PSU-3 and Matching Box-1. Problem is occurred after heavy power fluctuation
and customer bypassed UPS.
 Request customer to check power condition and earthing. Right now 3-phase power check and found 220VAC
balance.
Date: 28.06.16
 Today visited and fitted new PSU and matching box at PSU-1 MB-1. Done base discharge and rated
power PSU tuning.
 Fitted new PSU at PSU-3, taken trial and found during base discharge adjustment DCI3 found glow.
 Checked MB-3 and found 1 coil is become black from bottom. Customer’s MB1 all coils are ok only
arc found at bus bar. Replaced bus bar from MB3 to MB1 and fitted MB1 at MB-3 place.
 Taken trial and found at PSU-3 base discharge adjustment found completed. During rated power
adjustment fund DCi1 and DCi2 LED glow together. Also MCB for PSU-3 found tripped.
 Checked PSU-3 and found sort at input 3-phase terminal. Confirm that Fanuc PSU which is fitted to
machine is found faulty now.
 We will arrange one more set of matching box and PSU and visit again. Right now bypassed PSU3
hand over machine for production.

Finally i want to know that if DCI 3 LED found in any PSU that means its foulty???.
We should replace it??
It can damage Match box??

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