Siemens SENTRON 3WA1 Manual page 547

Fault
INFO LED lights up yellow.
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
8.2 Troubleshooting for the ETU600 electronic trip unit
Indication on the
display
ETU Error, current
sensor [phase], contact
Service
ETU warning, battery
low, replace battery
ETU warning, clock not
set, set clock
ETU warning, limit
temperature reached,
check ETU
COM module warning,
limit temperature
exceeded, check module
Circuit breaker warning,
inspection required,
perform inspection
Circuit breaker warning,
maintenance required,
perform maintenance
ETU warning, frequency,
parameterize rated
frequency
IOM230 module warning,
module not found, check
wiring
IOM230 module warning,
error in module, contact
Service
IOM350 module warning,
module not found, check
wiring
IOM350 module warning,
fault in module, contact
Service
COM module warning,
module not found, check
wiring
COM module warning,
error in module, contact
Service
BSS200 module warning,
module not found, check
wiring
Cause
Current sensor energy
converter defective
Battery low
Time not set
90% of limit temperature
of electronic trip unit
reached
Ambient temperature
above 70 °C
Contact erosion of the
main contacts requires
inspection.
Maintenance required
due to number of
operating cycles.
Contact erosion of the
main contacts requires
maintenance.
Parameterized and
measured frequencies
do not match.
The IOM230 module is
disconnected from the
CubicleBUS .
2
Error in IOM230 module
The IOM350 module is
disconnected from the
CubicleBUS .
2
Fault in IOM350 module
The communications
module is disconnected
from the CubicleBUS .
2
Error in communications
module
The BSS200 module is
disconnected from the
CubicleBUS .
2
Troubleshooting
Remedy
Replace all current
sensors of the circuit
breaker.
Replace the battery of
the electronic trip unit.
Set the clock of the
electronic trip unit.
Decrease temperature
load.
Decrease temperature
load.
Perform inspection.
Perform maintenance,
replace the main
contacts.
Parameterize the rated
frequency.
Check the CubicleBUS
2
wiring, replace the
IOM230 module if
necessary.
Replace the IOM230
module.
Check the CubicleBUS
2
wiring, replace the
IOM350 module if
necessary.
Replace the IOM350
module.
Check the CubicleBUS
2
wiring, replace the
communications module
if necessary.
Replace the
communications module.
Check the CubicleBUS
2
wiring inside the circuit
breaker, replace the
BSS200 module if
necessary.
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