F2-221 PowerOff after short period

[mds_iz]

I bought/installed the NAS F2-221 in September 2021 for a customer.
The plan was to automatic startup at 8:00 PM and shut down at 04:00 am.
I ran on the problem that the device switched off after some minutes after switching it on manually. I tried that some times.
I removed the option to automatic start up and shut down and the device ran with no break until last Friday (dec-04 '21).
Today at high noon I begged the customer via phone, to switch on the device. Now at 8:00 PM I tried to work with it from remote, but it switched off again.

Where can I begin to find the error? I have to drive about 200 km (124 mi) to visit the customer. So I can't try this and that and fiddle around.
I have several of that devices (F2-210/220/221) for my customers and one for myself. I never had such problem (ok, one time in the past I had configured the wrong time zone ).
Before you ask: The firmware is actual and original.

Thanks and greetings
Mark

[V8Triker]

There have been a few reports of "misbehaving" fans.
I would monitor the temperature, as that could be the root cause of your shutdowns.

The general solution is to set the fan to Medium, rather than Auto

[TMSupport]

{L_BUTTON_AT}mds_iz

Hi!
For TOS 4.2.18, in the fan smart mode, the device will automatically shut down when the hard disk temperature reaches 70°C. Please check the hard disk temperature. You can also set the fan mode to another mode.

[mds_iz]

Thanks for the replies.

I will try out and give a response.

Greetings - Mark

[titanrx8]

Also check the clock battery. Probably ok but might be losing the time.