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15).
Network connection is not stable.
Possible reasons are as followed:
1 Network is not stable.
2 IP address is conlicted.
3 MAC address is conlicted.
4 The net card of the DVR is bad.
16).
There is something wrong with the USB backup or writing a CD.
Possible reasons are as followed:
1 The rewritable machine and the hard disk are shared the same data
lines.
2 The data is too much. Please stop recording and backup.
3 The data exceeds the backup storage.
4 The backup equipment is not compatible.
5 The backup equipment is damaged.
17).
The keyboard can not control the DVR.
Possible reasons are as followed:
1 The serial port of the DVR is not set correctly.
2 The address is not correct.
3 When multiple transformers are connected, the power supply is not
large enough. Please give each transformer individual power supply.
4 The distance is too far.
18).
Alarm can not be recessional.
Possible reasons are as followed:
1 The setting of the alarm is not correct.
2 The alarm output is turned on manually.
3 The input machine is damaged or the connections are not correct.
4 There are some problems for speciic program edition, Please update the program.
19).
Alarm is not working.
Possible reasons are as followed:
1 The setting of the alarm is not correct.
2 The connection of the alarm is not correct.
3 The alarm input signal is not correct.
4 A alarm is connected with two loops synchronously.
20).
The remote controller is not working.
Possible reasons are as followed:
1 The remote control address is not correct.
2 The remote control distance is too far or the angle is too large.
3 The battery is used up.
4 The remote controller or the front panel of the recording machine is
damaged.
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