Quote from: manitu on October 27, 2014, 09:23:56 PM

Quote from: Tim.Shao19 on October 27, 2014, 07:09:06 AM

Quote from: manitu on October 24, 2014, 02:00:39 PM

Quote from: Tim.Shao19 on October 24, 2014, 03:12:42 AM

Quote from: manitu on October 23, 2014, 08:51:49 PM

Hi, yesterday I received an email about sending 3 new PSUs and information that other 7 will be shipped ASAP. I was really happy because I have had 3 miners without PSUs, but not for a long time. Nowadays I have 10 pcs S4 B1 and 10 pcs S4 B2 and a lot of S3+ miners.

Today morning when I arrived to work I smelled burnt stink. Employees were scared, called me and ran around. WTF I said for myself. I hoped that the reason for all arround was not caused by miners but I was not right. I looked at the miners and two of them were down. Immediately I switched off all breakers dedicated for miners. And yes, one miner had PSU burned down. It was very easy to find which miner was bad Sad

It was the fourth failed PSU. I checked all breakers and only one was switched off automatically.

When the smell disappeared from the building (after 2 hours) I started with switching on the breakers one by one. After that I switched on PSUs on S4s. But another one from B1 and also one from B2 could not start. Also fans were stopped. I tried to reconnect the power but nothing helped. I have not understood what happened. All miners were running more than one week continuously.
The PSUs do have really some problems. I hoped that PSUs in B2 were good, but....or today is only bad day for mining

Today status is 5 failed PSUs from 10 pcs from B1 and one failed PSU from 10 pcs from B2.

Truly sorry about that, Sir. This is Tim Shao from Bitmaintech. You may have received an email from info@bitmaintech.com asking you to specify the PSU type. And i wonder if you can provide some photos to show us the burned PSU, i'm not asking you to risk running the miner again. But it does help if we can glean some actual info from the affected customer and submit them to the PSU supplier, and this will also help us improve the product quality to prevent this from happening again. Thank you for your understanding.
I have the following questions:
1.
"I looked at the miners and two of them were down. Immediately I switched off all breakers dedicated for miners. And yes, one miner had PSU burned down. It was very easy to find which miner was bad"
Two were down, and one miner had PSU burned down? Which one was burned down? And what about the other one? Stop running? cannot power it up?
2.
And you mentioned in the following posts that your B2 has barcode on it and you are sure it's not from the defective batch, can you provide me your order id for this miner, or would you please send me a photo of it? Thanks.

Hi all, yes I have received the email. I am sure that the PSU is from batch 2 (have sticker and SN).
Answers for Tim.Shao19:
1. My miners are connected in pairs to single breaker(2xS4 to 1xC20 breaker). When one PSU burnt down and breaker for this miner went down also another miner switched off. Is it clear?
2. Order is 00120141014004349482tuQeQyd106EE from 2014-10-14 00:43:50.0. PSU SN:188A410120045 PSU don't have visible changes outside and also inside.

Hi there, we may have sent replacement PSUs to you, have u received any tracking no for the replacements? or you can provide me your email address or order id, then i will double check and keep you informed. And can you please provide any proof on your burned PSU if possible? (i know it may be difficult to tell the burned PSU from the appearance.) we need to glean some real info from customers and feedback with the PSU supplier rather than just claim that we got bad PSUs. Thanks.

Hi Tim.Shao19,
I sent you video with burned PSU last Friday. I really do not understand the purpose of that video you asked me for, as the burned PSU is not feasible to switch on, the fan is out of order. If there was a visible black burned component, I would have sent you a photo. But on this PSU are not visible changes.
Today I have received information from customs office that I have two shipments. One with 3 PSUs and second with 7 PSUs. I was really happy, but...
BITMAIN encloses invoice for 3*140=420USD and 7*140=980USD. The customs officer asked me for 280USD tax and 133USD duty. Great help Bitmain!!!
Now I have 5 days to submit relevant documents that the shipments include only "warranty replacement parts" and the invoices with ZERO values!
TIM, if you want to help me send me ASAP the invoices with zero vales and RMA documents that will be a prove for customs office. I refuse to pay any additional money your products related. I have spent a lot of time by the resolving problems with S4 miners.

may i know which country do you come from? and can i have more details on the RMA documents or customs clearance from your countries? the tax rate? Normally the replacement is listed as warranty part and should have waived the duties, even so, different countries may have different regulations. you can send an email directly to me: ting.shao@bitmaintech.com, thanks.