Siemens SIRIUS 3RW50 - 8.4 Faults and remedial actions of the 3 RW50 soft starter

Messages and diagnosis
8.4 Faults and remedial actions of the 3RW50 soft starter
SIRIUS 3RW50 soft starter
168 Manual, 09/2019, A5E35628455002A/RS-AA/001
8.4 Faults and remedial actions of the 3RW50 soft starter
Display of the faults
The 3RW50 soft starter signals faults by means of the following displays:
● LED "ER" (red)
● 3RW5 HMI Standard (accessories)
● 3RW5 HMI High Feature (accessories)
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
No.
1)
Error
Cause
Remedy
RESET MODE
Manual
2)
Remote
3)
Auto
4)
303 Bus error -
• Acknowledgment via Auto
RESET
- - x
308 Switching element
defective
-
• Check switching elements
L1, L2, and L3.
• Replace the defective
devices.
- - -
309 Switching element
overload
Contact block
(switching contact, power
semiconductor) too hot
• Check the ambient
conditions associated
with cooling. You may
want to consider lowering
the operating
characteristics.
• Check the number of
switching operations.
• Acknowledgment after
cooling down
x x -
317 Electronics supply
voltage too low
The supply voltage is below
the permitted value.
• Check the power supply
(load dimensioning,
voltage range).
- - x
319 Supply voltage
missing
• The line side switch or
the power supply is not
plugged in correctly.
• No current
• Check the cables and the
cable connections and
replace any defective
components.
x x -