14 Pelco Installation Manual C1487M-H (01/01)

TROUBLESHOOTING

PROBLEM POSSIBLE CAUSE SOLUTION
Check to see if the red LED on the circuit
board in the back box is lit.
1. The red LED is not lit.
a. Fuse is bad.
b. 24 VAC power source is not con-
nected or back box is bad.
2. The red LED is lit.
a. Wiring is incorrect or is not fully
seated.
b. DIP switch settings are incorrect.
Fan connections are not fully seated.
Cameras are out of phase.
a. Check fuse on the circuit board. Replace fuse if
it is bad. To order a fuse from Pelco, specify the
part number FUS1.6-5X20FAST. This is a 1.6-
ampere fuse, 5 x 20 mm, fast blow.
b. Use a voltmeter to check if 24 VAC is getting to
the power connector on the circuit board. If NO,
check your power supply. If YES, return the back
box to the factory for repair.
a. Check all connections to the circuit board.
Make sure that all connections are fully seated
and the board is wired correctly.
b. Check the DIP switch settings on the dome
drive (refer to Tables C, D, and E). If the unit still
does not operate, turn off power and replace
the dome drive with a good unit, if you have a
spare. Check the switch settings on the substi-
tute dome drive before installing it. (If you do not
have a spare, return the dome drive and back
box to the factory.) If you substituted a dome
drive and the unit operates, the original
dome drive is bad (return the dome drive to the
factory). If the unit still does not operate,
then the circuit board is bad (return the back
box to the factory).
Make sure the connector for the fan is fully seated.
If the fan still does not operate, return the back box
and dome drive to the factory for repair.
If you are wiring more than one dome to the same
transformer, it is important to wire the power con-
nector in each dome the same way. That is, the
wiring from one side of the transformer must be
connected to the same connector on each dome.
WARNING: Make
sure you wire power
to the outer connec-
tors of the terminal
block and ground to
the middle connec-
tor. Otherwise, you
could damage the
dome.
DOME 1
POWER
DOME 2
POWER
DOME 3
POWER
Unit does not operate.
The controller is not
communicating with the
Spectra unit.
Fan does not operate.
Vertical roll on monitor
when switching between
cameras.