Purchased Used T15

[sbcal403]

Hello

Setails
Home Eclectic - 120v
Both devices are in the garage on different circuits. i have made sure.
Using low power mode on both devices. i have made sure
Using 14g cables for power cables
using serge protect 500jouls with 14g cable

I purchased a used t15 and s11.

I ran the s11 first 24 hours. no issues with other devices running at once dryer, AC washer. no space heaters in the house.

I then power on the  t15 and let it run together. everything is running fine for over 24 hours. in that time dryer, stove, AC all been on/off in the house

I am getting 38thz on slush pool.

Issue:
I wake up today and T15 is offline. the device does not power on. no fan spinning. nothing.

Troubleshooting
tried different power cable.
tried different wall outlet in the home away from garage.

I have verified the outlet is working with other devices iphone charger, volcano vap, laptop charger. outlet is working.
Breaker is not tripped
No power serge or have had them at my house. living hear for a while.

S11 is still running to this moment no issues

Research done
I fine maybe the power supply has entered power protection mode and need to be set to bitmain.

or is the power supply just died from it being an old unit?

please advice would be great.

[1714103228]

1714103228

[1714103228]

1714103228

[1714103228]

1714103228

[philipma1957]

Don't be insulted.  I just wrote the problem below.

You can not run a t15 on 120 volt you killed it.

You wasted money.

You are at fault.

This is as simple as I can write it.

You could order a psu from bitmain.

APW8
OUT1   DC Voltage   16.32V-20.04V
Rated Current(220V input)   95A
Rated Power (220V input)   16.32V/1550W-20.04V/1850W
Ripple & Noise   <1%
Source Regulation   <1%
Load Regulation   <1%
Setup, Rise Time   <2S
Power off Protection Trip Time   >10mS
OUT2   DC Voltage   12.3V
Rated Current(220V input)   5A
Ripple & Noise   <1%
Voltage Accuracy   12.2V-12.4V
Source Regulation   <1%
Load Regulation   <1%
Setup, Rise Time   <2S
Power off Protection Trip Time   >10mS

Input   Voltage Range   200-240V AC.  [note specs. you killed it off]

Frequency Range   47-63Hz
Power Factor   >0.99(full load)
Leakage Current   <1.5mA（220V 50Hz）
Protection   Low-voltage Input   80-89V AC
Output Short Circuit   Yes
Output Overcurrent   95-130A
Overheat Protection   Yes
Environment   Operating Temperature   -20-60℃
Operating Humidity   20%-90%RH(non-condensing)
Altitude   < 2000m
Structure   Dimensions   204.8SSS*157*42.5mm
Weight   1.7kg
Cooling Mode   force-air cooling
Noise   67dBA

So if you buy the replacement you need 200-240volt input.

Sorry for your loss of money.

Edit :

I checked the s11

Oh some more news
the link for the s11

APW8
OUT1   DC Voltage   10V-11V
Rated Current(220V input)   95A
Rated Power (220V input)   16.32V/1550W-20.04V/1850W
Ripple & Noise   <1%
Source Regulation   <1%
Load Regulation   <1%
Setup, Rise Time   <2S
Power off Protection Trip Time   >10mS
OUT2   DC Voltage   12.3V
Rated Current(220V input)   5A
Ripple & Noise   <1%
Voltage Accuracy   12.2V-12.4V
Source Regulation   <1%
Load Regulation   <1%
Setup, Rise Time   <2S
Power off Protection Trip Time   >10mS

Input   Voltage Range   200-240V AC.  [odds are you will kill the s11 running on 120 volts]
Frequency Range   47-63Hz
Power Factor   >0.99(full load)
Leakage Current   <1.5mA（220V 50Hz）
Protection   Low-voltage Input   80-89V AC
Output Short Circuit   Yes
Output Overcurrent   95-130A
Overheat Protection   Yes
Environment   Operating Temperature   -20-60℃
Operating Humidity   20%-90%RH(non-condensing)
Altitude   < 2000m
Structure   Dimensions   204.8SSS*157*42.5mm
Weight   1.7kg
Cooling Mode   force-air cooling
Noise   67dBA

You will soon kill the s11 psu. running it on 120 volts.

[favebook]

You beat me to it phil... I was just writing the same answer.

Also, similar problem happened here:
https://bitcointalk.org/index.php?topic=5260960.0

So, feel free to watch that thread sbcal403.

[sbcal403]

The previous owner never has an issue running them on 120v. he said he did for over 9 months then got 240v

could it be just the Ps time to go?

[Pendrak]

And you believe him over the company who made then?

If i where you i just run to the S11 and disconnect it.

[philipma1957]

Okay lets try to explain it.

They have a max amp rating and they  are designed to do about 1600 watts on low.

so

1600/240 = 6.67 amps

1600/200 = 8.00 amps

1600/120 = 13.33 amps

they rate to 12.5 amps

so if you provide 115 and you friend provides  125

1600/115 = 13.91 amps not close enough to 12.50 amps

1600/125 = 12.80 amps close enough to 12.50 amps that the gear may live.

If you are in USA it is summer  YOU could be as low as 110 or 108

If the power is far from the main breaker you can sag to 105

so 1600/105 = 15.32 amps

But your money your gear you can buy a psu from bitmain and try it agin.

Or run it on 220-240 volts.

[sbcal403]

ok so let me clarify more

i have an older model
s11
19thz on high power and 17thz on low power mode
19.5thz @1365 watts
17thz@1120

So i have a power meter on it the s11 and i see on power on it goes up to 1450 watts then lowers to 1140 watts and stays
its goes to 9.7amps

also on the bitmain website it says under power supplies support
1. Generally if your miners requires more than 1200 watts the socket must deliver 220v.

Google says
yes i can make sure its on 15 amp circuit and nothing on it with 14g cable.

Modern circits are 15amp and max load of 1800watts

thanks for the help so far.

[mikeywith]

Both T15 and S11' PSUs are rated at 1850w on 220v so that's a max of 8.5 amps, 1120w on 120v is 9.3ams, so you are already pushing over the limit by a small factor, but still I think it's only a matter of time before you toast it, antminer T15 probably consumes a bit more than it even at lower power mode, so about 10 amps or more, more than what the PSU could handle.

Long story short, the PSU is toasted and you should STOP running the other miner on 110/120v.

[NotFuzzyWarm]

Modern circits are 15amp and max load of 1800watts

Yes -- and no. Unless they are dedicated runs to high power equipment be it a miner, microwave/toaster oven, the 15a ratings are given assuming 'typical household or office' loads. That means that hairdryers pulling 1,800w are fine - assuming they are not pulling that for more than a few hrs at a time per day but a much lower constant load is expected.

A standard rule of thumb is to never load a circuit to more than 80% of its rating. For 15A circuit it is a max of 12A that is safe.

[philipma1957]

Both T15 and S11' PSUs are rated at 1850w on 220v so that's a max of 8.5 amps, 1120w on 120v is 9.3ams, so you are already pushing over the limit by a small factor, but still I think it's only a matter of time before you toast it, antminer T15 probably consumes a bit more than it even at lower power mode, so about 10 amps or more, more than what the PSU could handle.

Long story short, the PSU is toasted and you should STOP running the other miner on 110/120v.

Don't bother he knows better than you or me.
His gear and his money. Not ours.
Brownouts in the summer never happen where he lives.
So it will work.
When it stops working it will be because it is old and not because it was  abused.

[mikeywith]

Don't bother he knows better than you or me.

Not to sound mean, but both you and I wouldn't run APW8 on 110v, so it looks like we might actually know a little bit more than what we think we know.

His gear and his money. Not ours.

Indeed, but I really hate to see someone toast their mining gears, the feeling I get when I check my hashrate and it's lower than it was yesterday is tragic to say the least, it hits me really hard, although by now I should have become immune to that, sadly I simply am not, and I am certain that most of you guys have the same feeling, so I would really INSIST on helping him save the remaining mining gear.

[philipma1957]

Some days I just get tired mean and ornery.  I guess being a 63 year guy does that.

Almost every companies gear is stretched near the limit.
So why push it just a little bit more?
In order for the gear to make money it has to keep working.
Breaking it makes it a loser.
It is not like a nice hash hot coin is out there paying 4 fold or 5 fold correct price.

[NotFuzzyWarm]

Some days I just get tired mean and ornery.  I guess being a 63 year guy does that.

Heh heh, welcome to the NotFuzzyWarm club  
Sometimes one has to be nean -- a 'nice' mean with comments not done out of arrogance but rather done just to very clearly drive home a point... In this case the need to pay attention to product ratings.

I have not bought any BM gear since the s9's but I would assume that the PSU's for the T15 & S11 has the AC input power ratings on it, no? Odds are the label says something along the lines of "AC power input 200-240VAC". AC power rating tags are pretty much universally required on anything that plugs into a powerline socket. If it does have the label then why on earth would one chose to ignore what the ratings label states

[mikeywith]

In order for the gear to make money it has to keep working.

Exactly, unless something major was going on like btc suddenly shot to 100k and it's going back down to 10k in a few days, or the halving is a few days ahead, aside from that I see no reason why would anybody push his gears beyond the limit, let alone plug them into the wrong voltage.

I have not bought any BM gear since the s9's but I would assume that the PSU's for the T15 & S11 has the AC input power ratings on it, no?

They do, they "say" that on the PSU pretty loud and clear, and honestly speaking despite Bitmain hashboards' terrible quality - their PSUs are rock solid, you could ask anyone who has a large farm of bitmain gears and most certainly they will have a ton of working PSU sitting on the shelf doing nothing because they simply don't break, even the recent 17 series PSUs are somehow robust except for the low-quality fans they have which go bad too often, so in order to break a Bitmain's PSU you need to either have terrible luck or the intention to break them by running them way beyond their limits.

On a side note (which is somehow related to the topic anyway) and based on my experience with these 17 series, 80% of the time it's a faulty fan that stops the PSU - so make sure you have a few spare fans (they go for about $5 or less each and NO they are different from all other non 17 series fans).

[sbcal403]

Power Protection mode question

how do we know the power supply is toast vs in power protection mode?

from reading power protection mode cant occur in low power mode.

OUT 1
APW8_16.32V-20.04V EMC
DC Voltage   16.32V-20.04V
Rated Current(220V input)   95A
Rated Power (220V input)   16.32V/1550W-20.04V/1850W

OUT 2
DC Voltage   12.3V
Rated Current(220V input)   5A

Protection
Low-voltage Input   80-89V AC
Output Short Circuit   Yes
Output Over current   95-130A
Overheat Protection   Yes

so protection happens at 95A. in lower power mode it gets to max 15A. my breaker. in high out 1 it gets to 95A so i feel the only way it can happen is in high output mode.

can someone confirm

Thanks
sb

[favebook]

how do we know the power supply is toast vs in power protection mode?

After it turns off (due to power protection or being toast), when you unplug and leave it for few hours and turn on again, if it runs normally, it went into power protection mode and you are doing something wrong if you caused that.

However, if it does not turn on after few hours of sitting w/o power, it's toast, and it means you've killed it by doing something terribly wrong (like running 240v PSU on 120v).

Stop using your gear on 120v and sell it if you value your money. If you do not, just do what you want but do not blame Bitmain or someone else later for destroying all your PSUs and possibly whole units.

[Pendrak]

so protection happens at 95A. in lower power mode it gets to max 15A. my breaker. in high out 1 it gets to 95A so i feel the only way it can happen is in high output mode...

You are WRONG and confused, output current (Amp) has nothing to do with the input current (Amp), INPUT is AC current, OUTPUT is DC current, this output current (DC) have nothing to do with the input protection.

Your PSU is not in protection mode. The protection mode work with a circuit that monitor the input voltage and current and control a relay, if something happen (overcurrent, overvolt, etc) the circuit activate the RELAY and cut the input AC, somethimes this protection fail and, in this case the other protections (Varistor, Thermistor, Fuse, Condenser, Diodes, etc) do their work.

Again, put then working at 110V-125V IS WRONG, there is nothing more to think about it, stop looking for the fifth leg on a cat.

[Philipma1957cellphone]

... stop looking for the fifth leg on a cat.

I like the five legged cat. I smiled so thank you.

[mikeywith]

OUT 1
APW8_16.32V-20.04V EMC
DC Voltage   16.32V-20.04V
Rated Current(220V input)   95A
Rated Power (220V input)   16.32V/1550W-20.04V/1850W

This output powers the hash boards, all numbers you see here are DC, and based on INPUT of 220v, so at 220v input the power provides DC of 95A , so that's 16.32V*95A = 1550w , 20.04V*95A =1900w (not sure why they have 1850w) but doesn't matter.

OUT 2
DC Voltage   12.3V
Rated Current(220V input)   5A

This powers the fans and probably the control board (not pretty sure).

Protection
Low-voltage Input   80-89V AC

This is bullshit from Bitmain, they probably copied these data from the APW3/APW7 datasheet, don't trust them, trust the members who told you NOT to run your S11/T15 on 110-120volts circuit.