Appendix 2: Troubleshooting - Lorex SG7382 Instruction Manual

Appendix 2: Troubleshooting

Appendix 2: Troubleshooting
Error Possible Causes
Camera runs • Keyboard or DVR
Self-Test when first communication protocol is not the
powered on, but same as that of the camera
cannot be controlled
• Keyboard or DVR
communication baud rate is not
the same as that of the camera
• RS485 polarity error (positive
and negative wires are switched)
• RS485 faulty wiring connection
Camera control is • Mainframe is too far from
working, but not camera
smoothly
• RS485 has a disconnected wire
• Too many cameras are
paralleled in a series
Camera is powered • Power adaptor may be not
on, but there is no firmly connected to outlet
video output
• The voltage from the outlet is
too low
22
Solutions
• Make sure protocols on keyboard or DVR match
those of the camera
• Make sure baud rates on keyboard or DVR match
those of the camera
• Switch polarity of RS485 wires
• Check RS485 wiring
• Check wires for error and/or set terminal
resistance at the last camera
• Reconnect RS485 wire
• Install an RS485 distributor
• Check the connection between the power adaptor
and the outlet
• Check that the voltage to the camera is 12V DC; if
not, use an adaptor that is no more than 12V
otherwise it will overload the camera
±
10%,