Siemens SIRIUS 3RW44 System Manual page 121

Message
Power unit overtemperature
Temperature sensor short
Temperature sensor open
Temperature sensor overload
Max. starting time exceeded
Current limit exceeded/ undershot
Ground fault
Manual operation connection abort
Impermissible Ie / CLASS settings
No external start parameters received
(for product version ≥ *E06* devices)
PIO error (for product version ≥ *E06*
devices)
SIRIUS 3RW44 System Manual
GWA 4NEB 535 2195-02 DS 04
Cause / Remedy
x The temperature of the thermal model for the power unit 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 10.3
"Technical Data").
x x x Temperature sensor is short-circuited 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 is
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, if necessary, check motor.
x The set maximum starting time is shorter than the actual 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. due to a clogged fan filter or by the
motor stalling.
Remedy: Check the motor / load for the reason why the current limit value was exceeded/
undershot or adjust the limit value according to the existing load conditions.
x x One phase is connected to ground (only possible in bypass operation).
Remedy: Check connections and wiring.
x Connection to the PC has been interrupted (if PC-controlled) or (if motor is key-controlled)
no key has been pressed for a long period of time (see settings > Display > Activity
monitoring time in Chapter 5.4.10.
Control will be handed over to the inputs if these have requested control priority.
Remedy: Reconnect the PC or increase activity monitoring time and press a key at regular
intervals.
x The set rated operating current I
exceeds in at least one of the three parameter sets the corresponding, maximum
permissible set current, based upon the selected CLASS settings (Chapter 5.4.9
"Selecting Motor Protection Settings"). In product version ≥ *E07* devices, the
corresponding parameter set (PS) in which the incorrect value is to be found will be
displayed.
For maximum permissible adjustable values please refer to Chapter 10.3 "Technical Data".
If the soft starter is connected in an inside delta circuit, the motor feeder may have been
incorrectly wired (Chapter 9.1.5 "3RW44 in an Inside elta Circuit") so that 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,
reduce the CLASS setting or use larger soft starter dimensions. If used for inside delta
circuits, check the wiring of the motor feeder to ensure that it corresponds to the specified
circuit diagrams.
If the motor is not activated this is only a status message. However, the message turns into
an error without restart once a start command is issued.
x Only when operated with PROFIBUS DP. Incorrect or non-permissible parameter values
have been sent by the PLC.
Remedy: The incorrect parameter can be read out and corrected to a permissible value via
the Soft Starter ES software.
x PIO error (process image of the outputs faulty) is displayed:
• If Motor right and Motor left are simultaneously selected (Cause 1) or
• were selected via PLC parameter set 4 (Cause 2).
Remedy:
• Automatic deletion once Motor right and Motor left are deactivated again (Cause 1), or
• a valid parameter set (PS 1-3) is set (in the case of Cause 2).
Diagnosis and Messages
of the motor (Chapter 5.4.2 "Entering the Motor Data")
s
7-5