Siemens SENTRON 3WA1 - Page 547

Troubleshooting
8.2 Troubleshooting for the ETU600 electronic trip unit
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
545
Fault
Indication on the
display
Cause
Remedy
INFO LED lights up yellow.
ETU Error, current
sensor [phase], contact
Service
Current sensor energy
converter defective
Replace all current
sensors of the circuit
breaker.
ETU warning, battery
low, replace battery
Battery low
Replace the battery of
the electronic trip unit.
ETU warning, clock not
set, set clock
Time not set
Set the clock of the
electronic trip unit.
ETU warning, limit
temperature reached,
check ETU
90% of limit temperature
of electronic trip unit
reached
Decrease temperature
load.
COM module warning,
limit temperature
exceeded, check module
Ambient temperature
above 70 °C
Decrease temperature
load.
Circuit breaker warning,
inspection required,
perform inspection
Contact erosion of the
main contacts requires
inspection.
Perform inspection.
Circuit breaker warning,
maintenance required,
perform maintenance
Maintenance required
due to number of
operating cycles.
Perform maintenance,
replace the main
contacts.
Contact erosion of the
main contacts requires
maintenance.
ETU warning, frequency,
parameterize rated
frequency
Parameterized and
measured frequencies
do not match.
Parameterize the rated
frequency.
IOM230 module warning,
module not found, check
wiring
The IOM230 module is
disconnected from the
CubicleBUS
2
.
Check the CubicleBUS
2
wiring, replace the
IOM230 module if
necessary.
IOM230 module warning,
error in module, contact
Service
Error in IOM230 module
Replace the IOM230
module.
IOM350 module warning,
module not found, check
wiring
The IOM350 module is
disconnected from the
CubicleBUS
2
.
Check the CubicleBUS
2
wiring, replace the
IOM350 module if
necessary.
IOM350 module warning,
fault in module, contact
Service
Fault in IOM350 module
Replace the IOM350
module.
COM module warning,
module not found, check
wiring
The communications
module is disconnected
from the CubicleBUS
2
.
Check the CubicleBUS
2
wiring, replace the
communications module
if necessary.
COM module warning,
error in module, contact
Service
Error in communications
module
Replace the
communications module.
BSS200 module warning,
module not found, check
wiring
The BSS200 module is
disconnected from the
CubicleBUS
2
.
Check the CubicleBUS
2
wiring inside the circuit
breaker, replace the
BSS200 module if
necessary.