Faults And Remedial Actions Of The 3Rw51 Soft Starter - Siemens SIRIUS 3RW51 Equipment Manual

9.4

Faults and remedial actions of the 3RW51 soft starter

Display of the faults
The 3RW51 soft starter signals faults by means of the following displays:
• LED "ER" (red)
• 3RW5 HMI Standard (accessory)
• 3RW5 HMI High Feature (accessory)
Display of the faults on the 3RW5 HMI
• 3RW5 HMI Standard: The display shows fault numbers that you can assign to the respective
fault on the basis of the following table.
• 3RW5 HMI High Feature: Detailed information about faults and remedial actions appears in
plain text on the display.
Faults and remedial actions
Error Error
No.
1)
303 Bus error
308 Switching element de‐
fective
309 Switching element
overload
SIRIUS 3RW51 Soft Starter
Equipment Manual, 09/2020, A5E37108631002A/RS-AC/003
Cause
Fault in the fieldbus com‐
munication.
You will find further infor‐
mation in the manual for
the 3RW5 communica‐
tion module in question.
• Switching element de‐
fective
• The fault is also gener‐
ated if the defective
switching element
(bypass or power sem‐
iconductor) cannot be
accurately identified.
Switching element
(switch contact, power
semiconductors) too hot.
9.4 Faults and remedial actions of the 3RW51 soft starter
Remedy
• Check the bus connection.
• Check the bus parameters.
Check the switching elements
L1, L2, and L3 and replace any
that are defective.
• Check the ambient condi‐
tions associated with cool‐
ing. You may want to con‐
sider lowering the operat‐
ing characteristics.
• Check the number of
switching operations.
• Acknowledgment after
cooling down
Messages & diagnostics
RESET MODE
Man‐ Re‐ Auto 4)
ual mote
2) 3)
- - x
- - -
x x -
135