ABB | SACE Tmax XT
22 | © 2019 ABB | 1SDH002039A1002 - ECN000093027 - Rev. A
Management operations | 2 - Maintenance and troubleshooting
Continued from the previous page
Fault
Possible causes
Suggestions
The PIN is not
required
The PIN has been disabled or has
already been entered in the same
programming session
Operating condition correct; consult
chapter relating to the PIN
PIN error
PIN wrong or lost
Contact ABB or consult document
1SDH001501R0001
It is not possible to
perform the trip test
Trip coil is not connected properly
Check Trip coil connection and
messages on display
CB trip signal has not been reset
Press the reset pushbutton
The busbar current is greater than zero
Correct operating condition.
TRIP fail signaling:
Trip
Fail command (BF)
One or more of the following conditions:
• Trip coil not working
• status contacts not working
• faulty internal wiring
1. If closed, open CB in the manual
mode and check changed status.
2. Press iTest, check that the signal has
disappeared from the display and the
general status of the alarms.
3. Check the conditions of the wiring
and internal contacts
4. Working in safety conditions, close
the CB and perform a trip test via the
trip unit
Contact ABB if problems persist
The expected trip
does not occur
Trip excluded
Operating condition correct; enable trip
if necessary
Trip times different
than expected
Wrong threshold/time/curve selected
Correct parameters
Thermal memory enabled
Disable it if it is not necessary
Zone selectivity enabled
Disable it if it is not necessary
Incorrect neutral selection
Modify the neutral selection
Rapid trip with I3=Off linst trip
Correct operating condition with short
circuit at high current
High ground-fault
current, but no trip
occurs
Incorrect selection of the sensor
Set internal or external sensor
Function G inhibited owing to high
current
Operating condition correct (see
protection description chapter)
Opening data not
displayed
No auxiliary power supply and/or battery
low
Correct operating condition.