EST EST3X - Page 231

Chapter 7: Service and troubleshooting
EST3X Technical Reference Manual 221
Table 67: Signature Series module trouble messages
Device
Trouble message Possible cause Possible solution
Relay switched
The relay toggled from the
actual state
• Manually reset the relay
• Replace the module
Vector current too large
Devices on the loop are
drawing too much current
during the mapping
procedure
Place a temporary short across
the data loop (approximately
5 seconds)
Vector current too small
Devices on the loop are not
drawing enough current
during the mapping
procedure
• Reduce the loop resistance
• Replace the base
• Check for defective wiring
EEPROM
not initialized The EEPROM is not properly
programmed
Replace the module
EEPROM
write time out The EEPROM is bad Replace the module
A/D time out
The A/D converter is
defective
Replace the module
EEPROM
write verify fault The EEPROM is defective Replace the module
Line monitor trouble
The loop voltage is low Check the loop
Class A trouble
A short or open is detected
on the input or output circuit
Check input/output loop wiring
RAM not programmed
The RAM is bad Replace the module
Trouble Tables diagnostics
Trouble Tables display multiple categories of active device troubles. The active
troubles should be compared with a device’s trouble history (Device Trouble tab)
to determine any possible trouble pattern.
Click the Trouble Tables tab to resolve device troubles. Press F1 to open the
Trouble Tables Help topic that provides instructions and descriptions for the
information provided.
Refer to Table 66 and Table 67 for a list of trouble messages, their possible
causes and possible solutions.
Signature Series real-time statuses
The Signature Series status function is used to determine the real-time status of
a Signature data loop. This function is useful in isolating and correcting faults on
the loop.