TROUBLES POSSIBLE REASONS SOLUTIONS No action or video after power on 1.Cable wrong connection (DC power) reconnect it 2.Power supply failure change the power 3.Poor connection of the power cable reconnect it Can not control the PTZ 1.Protocol of PTZ and Dome camera are different(non-auto recognition) reset the protocols 2.Baud rate of camera and PTZ are different(non-auto recognition reset the baud rate 3.Address code error reset address code 4.RS-485 open circuit check RS-485 cable 5.RS-485 cable INT check RS-485 cable 6.RS-485 cable brokendown check RS-485 cable 7.RS485 cable reversed connection(non-auto recognition) reconnect it Unstable image 1.Video cable INT reconnect it 2.Power is not enough change the power Image flicked or camera reboot while rotating 1.Transformer aging resulted in power supply voltage not enoughchange the power source 2.Transformer placed too far away from camera attenuates the power supply measure the voltage with power on 3.Centralized power supply,voltage power is not enough measure the voltage with power on 4.Poor connection of the moduel and control main board reconnect them 5.Slip ring mulfunction contact your local supplier Indoor normal,outdoor no image 1.Fan or heater mulfunctionchange it 2.Power supply for heater is not enough in severe cold region measure the voltage with power on3.Ambient temperature exceeds the applicable range Remove failures No image diplayed 1.Video cable INT or brokendown reconnect it or change the cable 2.Power supply is not enough change the power 3.Poor connection of the module and the control main boardreconnect them 4.Module mulfunction replace it 5.Fan or heater brokendown replace it Camera fog 1.Built-in fan brokendown replace it 2.Built-in heater brokendown replace it 3.Improper installation of the sealing ring of the transparent cover reinstall it 4.Humidity enviroment,large temperature difference or too coldRemove failures Zoom failure 1.Poor connection of the module and the control main board reconnect them 2.Module failure change to a new module Characters display error 1.Video system of module mismatched that of the control main board reconnect it 2.Character chip of the control main board failure change the character chip