Siemens SENTRON 3WA1 - Page 546

Troubleshooting
8.2 Troubleshooting for the ETU600 electronic trip unit
3WA1 air circuit breaker
544 Equipment Manual, 02/2023, 92310000002-06
Fault
Indication on the
display
Cause
Remedy
INFO LED lights up red.
ETU Error, system,
contact Service
Error in application
processor
Replace the electronic
trip unit.
ETU Error, contact
Service
Error in analog
measuring circuit or
watchdog error
ETU Error, current
sensor [phase], contact
Service
Current sensor
Rogowski coil defective
Replace all current
sensors of the circuit
breaker.
ETU Error, limit
temperature exceeded,
check ETU
Upper/lower
temperature limit of
electronic trip unit
violated
Replace the electronic
trip unit.
ETU Error, VTM module,
contact Service
Error in voltage tap
module VTM
Can occur during
insulation testing of the
power distribution
equipment. Insert the
voltage tap module
(VTM) correctly or
replace if necessary.
ETU Error, firmware
update, contact Service
Error during firmware
update of electronic trip
unit
Repeat the update and
replace the electronic
trip unit if necessary.
Circuit breaker error,
system, contact Service
BIM error
SIEMENS Service
required, replace circuit
breaker if necessary.
ETU Error [protective
function parameter],
contact Service
Rotary coding switch of
electronic trip unit
defective
Turn the rotary coding
switch by 720° and
check whether this
rectifies the error, use
position e.SET if
necessary, replace the
electronic trip unit if
necessary.
Electronic trip unit error,
indication of trip cause,
contact Service
Indication of trip cause
faulty
Replace the electronic
trip unit.
Circuit breaker error,
end of service life
reached, replace the
main contacts
The circuit breaker has
reached the specified
number of mechanical
operating cycles.
Perform maintenance,
replace the main
contacts.
Circuit breaker error,
end of service life
reached, replace the
circuit breaker
The main contacts have
reached the end of their
mechanical service life.
Replace the circuit
breaker.