Dahua HCVR5104C User Manual page 578

5.10.3.5 Abnormality
It includes four types: HDD/Network/User/Device. See Figure 5- 94 through Figure 5- 97.
HDD includes: No disk, disk error, disk no space.
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Network includes net disconnection, IP conflict, and MAC conflict.
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User: It includes illegal login.
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Device: It includes device temperature alarm, fan alarm and etc.
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Figure 5- 93
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