Siemens SIRIUS 3RW44 Manual page 112

Diagnostics and Messages
Message
Switch off - motor stalls
Current limits exceeded
Power component overheated
Power component overtemperature
Temperature sensor short circuit
Temperature sensor wire break
Temperature sensor overload
Max. starting time exceeded
Ie limit value exceeded/ undershot
Ground fault recognized
Connection break manually, locally
Impermissible Ie / CLASS settings
7-4
Cause / Remedy
x A very high current suddenly occurs in bridging mode, e.g. when the motor stalls (I >
4 x I higher than 100 ms).
eMotor
Remedy: check motor.
x A current of more than 6 times the rated operating current has occurred for a long period of
time.
Remedy: activate current limiting or check dimensioning (device/motor).
x x Overload trip of the thermal model for the power component.
Remedy: wait until the device has cooled down, try to set a lower current limit or reduce the
switching frequency (too many starts in succession).
Check if the motor is blocked or if the ambient temperature is too high in the vicinity of the
soft starter (for derating above 40 °C, refer to Chapter 9.3 "Technical Data").
x Temperature of the thermal model for the power component is higher than the permissible
permanent operating temperature.
Remedy: Check the motor operating current or check if the ambient temperature is too
high in the vicinity of the soft starter (for derating above 40 °C, refer to Chapter 9.3
"Technical Data").
x x x Temperature sensor is short at terminals T1 / T2.
Remedy: check temperature sensor.
x x x Temperature sensor faulty at terminals T1 / T2 or one line is not connected or no sensor
connected at all.
Remedy: check temperature sensor, or if none is connected: deactivate temperature
sensor.
x x x Temperature sensor tripped at terminals T1 / T2, motor overheated.
Remedy: Wait until the motor has cooled down and check motor if necessary.
x The selected starting time is shorter than the run-up time of the motor.
Remedy: Extend "Max. starting time" parameter, increase current limit value or check load
connected to the motor for mechanical faults.
x x Set current limit has been exceeded or undershot, e.g. by a clogged fan filter or by the
motor stalling.
Remedy: check motor / load for cause of current limit violation.
x x One phase is connected to earth (only possible in bypass operation).
Remedy: check connections and wiring.
x Connection to the PC broken (if PC-controlled) or no key has been pressed for a long
period of time (> activity monitoring time) (if motor is key-controlled).
The control will be handed over to the inputs if they requested control priority.
Remedy: reconnect PC or increase activity monitoring time and press a key at regular
intervals.
x The set rated operating current I
exceeds the associated, maximum permissible set current, which is based on the selected
CLASS settings (Chapter 5.4.9 "Selecting Motor Protection Settings"), in at least one of the
three parameter sets.
For maximum permissible adjustable values please refer to Chapter 9.3 "Technical Data".
When the soft starter is connected in an inside delta circuit, the wiring of the motor branch
may have been implemented incorrectly (Chapter 8.1.5 "3RW44 in an Inside Delta Circuit")
and the "Status display / Connection method" menu item (Chapter 5.5.2 "Status Display")
shows "Unknown / fault".
Remedy:
Check the set rated operating current of the motor in all 3 parameter sets, lower CLASS
settings or use larger starter dimensions. Compare wiring of the motor branch to specified
circuit diagrams for inside delta circuits.
As long as the motor is not controlled it is only a status message. However, the message
turns into an error without restart when a start command is issued.
of the motor (Chapter 5.4.2 "Entering Motor Data")
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GWA 4NEB 535 2195-02 DS 02
SIRIUS 3RW44 manual