EST EST3X - Page 209

Chapter 7: Service and troubleshooting
EST3X Technical Reference Manual 199
When you:
Response
Remove a detector
, and then
r
einstall a different detector
type in the same base.
• A system trouble displays on the LCD screen when the
detector is removed. The message shows the detector’s
label or address.
• The Signature loop controller remaps the loop
, replacing the
serial number of the old detector with the serial number of
the new detector, when mapping is enabled. All of the old
detector’s sensitivity an
d verification settings are transferred
to the new detector. The new detector will be operational
but a system trouble displays, indicating a device type
mismatch. To clear the trouble, the new detector type must
be assigned to the base using the 3-SDU and
the database
downloaded to the panel.
• The communication fault for the old detector remains
, when
mapping is disabled.
Remove a module or pull
station
, and then reinstall a
different module/pull station
type in the same location.
• A system trouble displays on the LCD screen when the
module/pull station is removed. The message shows the
device’s station label or address.
• The Signature loop controller remaps the loop
, replacing the
serial number of the old device with the serial number of the
new device, when mapping is enabled. The new device is
not operational. A system trouble displays, indicating a
device type mismatch. To clear the trouble, the new device
type must be defined using the 3-SDU and the database
downloaded to the panel.
• The communication fault for the old detector remains
, when
mapping is disabled.
• If a single address module is replaced with a dual address
module or vice versa, a map fault is generated by the
address count mismatch.
Signature data loop troubleshooting basics
The 3-SDC1 loop controller card provides one Class B or Class A signaling line
circuit that supports up to 125 detectors and 125 module addresses. The card
also provides resettable 24 VDC for powering conventional two-wire smoke
detector circuits on Signature Series modules. When a device is removed from
the loop, the loop controller recognizes the change and the control panel
processes the information.
Isolating loop and device problems
The process of isolating a problem on a Signature data loop is similar to that
used on a conventional fire alarm Initiating Device Circuit (IDC). An accurate and
complete wiring diagram of the loop installation is the best troubleshooting aid