Dear customer,

Could you please send us email to support@netrohome.com with your Netro account registered email?
We will have our technician look into this issue. 

When Netro controller finishes running a watering schedule, it will send a confirmation to the cloud server. In this way, the could server knows whether the schedules are correctly executed or not.

The exclamation mark means the cloud server did not receive the confirmation from the device. There are two possible causes:
1. the device is not powered up when it was supposed to be powered up to run that schedule. Therefore, the corresponding zone is not watered (what is why we use the exclamation to alert users)
2. the schedule run fine but it was during a temporary network outage or exception so that the confirmation cannot be delivered to the server. Wireless connection can be unstable for a short peroid time so it is not uncommon to have a glitch in the communication.
Please do a manual run test, see if there is water come out when your manual run start to water. 

Thanks
Wency, 
Netro Support