Learning more about the exception types of Reolink NVRs will help you with your NVR working.

Applies to: Reolink NVRs

There are four exception types for Reolink PoE NVRs: 

Old UI (H3MB16, H3MB02, H3MB06, H3MB17)

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New UI (H3MB18, N2MB02, N3MB01, N5MB01, N6MB01, N7MB01)

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HDD Full: the hard disk is full.

HDD Error: the hard drive has an error.

Net Disconnected: the camera on a certain channel is offline.

IP Conflict: the IP address on one channel conflicts with another.

Note: You can configure the email settings to set the email alert for selected cameras (channels) when the selected camera (channel) meets the exception situation.

How to Set up E-mail via Reolink PoE NVR

How to Set Up Email Alerts via PoE NVR (New UI)

You may also want to know: 

How to Set up Exception Buzzer for PoE NVR

How to Set up Exception Buzzer for PoE NVR (New UI)