Please check the "ASIC Status"
If you have to many chips on yellow or red, then you get a lot of rejectet shares.
If this is the case, go to the settings page and click on "Save and restart miner".
Wait 5 mins, then check again the "ASIC Status". Normally it gets better after a restart.
If not, "Save and restart miner" again or choose the "Save and restart machine".
And yes, profit is very low right now.
You can check here:
https://www.asicminervalue.com/miners/dayun/zig-z1I Update to version to 20180930-overclocking
Change frequency to "1000" & auto_frequent:"1"
but result Not more change , Daily
22$ Profit , it's Normal ?
and
Rejected rates is very High, why ?

I using Nicehash Pool ,
Which Pool more profit ?
BTCI use 20180930
I't's good for overclocking and it's also stable.
in original website i found 3 version .
1- 20180930-stable
2- 20180930-overclocking
3- 20181015-stable
Which one is more profitable?

I want to use your advice
my version is20180926, Where i can find 20180930 or higher?
Change the value of auto_frequent from 0 to 1:
"auto_frequent":"1"Change the value of frequency from 900 to 950 or 1000:
"frequency":"900" or
"frequency":"1000"Only do this changes after you upgraded your firmware to version 20180930 or higher.
Version 20180930
https://drive.google.com/drive/folders/1Y1YXEgEnIFVnmzmD7PaTAMrVEDikTrfR