Pelco ESPRIT ES3012 - Manual (Page 30)

30 Pelco Manual C306M-K (4/05)
TROUBLESHOOTING
Symptom: System does not operate.
1. Check system input voltage.
2. Check for proper positioning of input power select switch for the transformer (ES3012-5
models only).
3. The Esprit system is protected by a resettable overcurrent protective device located in
the transformer module. Whenever a fault condition is experienced in the system caus-
ing excessive current flow through the protective device, a change occurs that will pre-
vent current flow. The protective device will remain in this state as long as power is ap-
plied and the system fault remains. The protective device will reset itself after power
has been removed for a few minutes and will operate normally when the system fault
has been repaired.
4. Check the camera and lens power connections and video BNC connections.
Symptom: No control/sluggish control (Coaxitron)
1. Check for correct type and length of coax cable.
2. Check for correct coax termination (refer to the controller manual to determine proper
termination of video input). Normal load termination is 75 ohms. When looping through
VCRs or multiplexers, make sure the signal is terminated at the end device. Some ter-
mination symptoms and problems are listed below.
Symptom Problem
Extremely bright video No termination or high resistance
Over contrast or contrast
level of monitor needs to
be increased to maximum
for a good video image
Double termination (37.5 ohms)
3. If pan and tilt operation is sluggish, check the controller manual to make sure the con-
trol signal is set in the extended mode, not standard mode.
Symptom: No control (RS-422)
1. Check for correct cable type and length. The maximum cable distance for RS-422
communication over 24-gauge wire is 4,000 feet (1,219 m). Pelco recommends using
shielded twisted pairs, such as Belden 9843 or similar cable, that meets or exceeds
the basic requirements for EIA RS-422 or RS-485 applications.
2. Check for correct wire connections between transmitting device (such as the CM6700
Series matrix system) and Esprit system receiver. Correct connections are from the
transmitting device TX+ to Esprit system RX+ and from the transmitting device TX- to
Esprit system RX-.
3. Check for correct DIP switch settings.
4. Check that the video is terminated.
Symptom: Ground loops
Ground loops are indicated by seeing 60 Hz noise on the video.
1. Check for resistance between the grounds of the keyboard and the system. Ideally,
there should be zero ohms.
2. Remove the coax BNC connector and check for voltage between the BNC shield of
the controller and the BNC shield of the system. No voltage should be detected.
It is recommended that a Pelco GIT100 ground isolation transformer be installed to elimi-
nate the above problems.