Siemens SENTRON 3WA1 Manual page 546

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