EST EST3X - Page 226

Chapter 7: Service and troubleshooting
216 EST3X Technical Reference Manual
Problem
Suggested corrective action
Mapping was aborted by an external event,
such a
s a new start on a device (a map rebuild
was schedu
led)
Wait for automatic map reconstruction to
complete before continuing
Mapping supervision detected that the
supe
rvised device’s type changed (a map fault
was flagged
)
• Replace the device
• Correct the loop controller programming
Mapping aborted because a short or open
was
detected
on the loop wiring
• Check for an open or short on a Class A
loop
• Check for a short across the entire Class B
loop
• A reset may restart mapping
Panel startup
is not able to recreate the current
map
Wait for the automatic map reconstruction to
complete before continuing
Assign
ing a short address to a device failed,
possibly
causing duplicate short addresses and
mapping failures
• Review the Chain Response and Device
Response lists on the Device Chains tab to
identify the failed device
• Replace the device
• Check for a wiring fault
Mapping
is disabled Enable mapping
While mapping a c
hain from a device back to
the loop controller, the chain appears to have
two devices at the same location
• Check for faulty wiring or a faulty device
on
the loop
• Review the Chain Response and Device
Response lists on the Device Chains tab to
identify the conflict
More than 125 end
-of-line devices are detected
on the
loop
• Correct the wiring
• Remap the loop
• Reduce the number of T-taps
While mapping a chain from a device back to
the
Signature loop controller, a device displays
past the end of the c
hain
• Review the Device Chains list
to identify the
device
• Compare the serial numbers or addresses
with the actual wiring to identify the problem
Mapping detected a difference between the
device at the end
-of-line and the devices in its
chain
• Review the Device Chains lists to identify
the conflict
• Compare the serial numbers or addresses
with the actual wiring to identify the conflict
Device chain diagnostics
A chain is a list of devices connected between the Signature loop controller
module and a device being interrogated during loop mapping. The chains and