Siemens SENTRON 3WA1 - Troubleshooting for the ETU600 Electronic Trip Unit

Troubleshooting
8.2 Troubleshooting for the ETU600 electronic trip unit
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
543
8.2 Troubleshooting for the ETU600 electronic trip unit
Fault
Cause
Remedy
ACT LED does not flash when the
main contacts are closed.
Electronic trip unit is not activated;
the operational current via the main
contacts is too low.
An external power supply is required
for activating the electronic trip unit
below the activation limit.
Internal self-test cannot be started.
ACT LED flashes; the display is dark.
The ambient temperature is outside
the range -25 °C to 60 °C.
Implement suitable measures to
change the ambient temperature.
The operational current is close to the
activation limit of the ETU within a
narrow range. The protective function
is already supplied with power, but
not the display; see Chapter
Activation limits and power supply
(Page
76).
The display is automatically activated
when the load is greater.
If this occurs frequently: Connect the
ETU600 to an external 24 V DC power
supply.
No tripping during internal self-test
with tripping operation.
The main contacts of the circuit
breaker are not closed.
Close the main contacts.
Tripping solenoid F5 is defective.
Contact Siemens Service.
Connection between electronic trip
unit and SENTRON powerconfig
configuration software cannot be
made via the USB-C interface or
Bluetooth.
Bluetooth and USB-C interface
TUI600 is defective.
Replace the ETU including the TUI600
module.
Bluetooth is not active.
Activate Bluetooth.
The TUI600 module is not active
because of low energy (only for ETU
with its own power supply)
Check power supply of the ETU600.
USB-A to USB-C connecting cable is
used.
USB-C to USB-C connecting cable is
used.
Write protection cannot be removed.
PIN code for write protection has
been lost.
Reset using the SENTRON
powerconfig configuration software:
1. Connect powerconfig via USB-C.
2. Call up the menu
"Device > Reset > ETU600 passw
ord" menu.
Fault Indication on the
display
Cause Remedy
Circuit breaker trips and INFO LED
lights up red.
ETU Error, system,
contact Service
Error in protection
processor
Replace the electronic
trip unit.
ETU Error, contact
Service
Recurring error in the
analog measuring circuit
ETU Error, option plug,
contact Service
Error in option plug
Replace the option plug.
ETU Error, option plug,
replace the option plug
Option plug not
approved or missing
Check the technical
specifications of the
option plug and replace
if necessary.