FAQ
211
A: Possible causes:
Audio function is not enabled.
The corresponding channel does not connect to the camera. Playback is not
continuous when the screen is blue.
13) Q: System time is not correct.
A: Possible causes:
Setting is not correct.
Poor battery contact or voltage is too low.
Crystal oscillator is poor.
14) Q: USB backup error.
A: Possible causes:
Too much data which occupies CPU resources. Please stop recording first and then
begin backup.
Backup device is not compatible.
Backup device is damaged.
The backup device features high power and needs separate power supply.
15) Q: Alarm function does not work.
A: Possible causes:
Alarm setting is not correct.
Alarm cable connection is not correct.
Alarm input signal is not correct.
There are two loops connected to one alarm device.
16) Q: Messy channel display.
A: Possible causes:
Incorrect selection of camera type. Auto switch is recommended.
The camera is damaged.
17) Q: Record storage time is not enough.
A: Possible causes:
Low camera quality, dirty lens, camera installed against the light, or iris not properly
adjusted caused large big rate.
SD card capacity is not enough.
Part of SD card is broken
18) Q: No 3G/4G dial-up. No dial-up IP,
A: Possible causes:
Check if the SIM card is normal.
Check if the SIM card is not in service.
Check if the 3G/4G antenna is connected as intended.