Siemens SIRIUS 3RW44 Manual page 111

Message
Phase failure L2
Phase failure L3
Missing load phase T1
Missing load phase T2
Missing load phase T3
Supply voltage under 75 %
Supply voltage under 85 %
Supply voltage above 110 %
Current asymmetry exceeded
Thermal motor model overload
Prewarning limit motor heat build-up
Remaining time for tripping undershot
Line overvoltage
Current measuring range exceeded
SIRIUS 3RW44 manual
GWA 4NEB 535 2195-02 DS 02
Cause / Remedy
x Phase L2 missing or it fails while motor is running or it drops off.
Remedy: connect L2 or rectify cause of voltage drop.
Or: the motor that is connected is too small and the error message occurs immediately
after switching over to bridging mode.
Remedy: adjust rated operating current for connected motor or set it to minimum (if motor
current is lower than 10 % of the configured I
starter).
x Phase L3 missing or it fails while motor is running or it drops off.
Remedy: connect L3 or rectify cause of voltage drop.
Or: the motor that is connected is too small and the error message occurs immediately
after switching over to bridging mode.
Remedy: adjust rated operating current for connected motor or set it to minimum (if motor
current is lower than 10 % of the configured I
starter).
x Motor phase T1 is not connected.
Remedy: connect motor properly.
x Motor phase T2 is not connected.
Remedy: connect motor properly.
x Motor phase T3 is not connected.
Remedy: connect motor properly.
x Control supply voltage is below 75 % of the required nominal voltage for longer than
100 ms (voltage failure, voltage drop, wrong control supply voltage).
Remedy: check control supply voltage.
x Control supply voltage is below 85 % of the required nominal voltage for longer than 2 ms
(voltage failure, voltage drop).
Remedy: check control supply voltage.
x Control supply voltage is below 110 % of the required nominal voltage for longer than 2 ms
(voltage failure, voltage drop, wrong control supply voltage).
Remedy: check control supply voltage.
x x Phase currents are asymmetric (asymmetric load). Message is output when the asymmetry
is greater than the configured limit (parameter: current asymmetry limit value).
Remedy: check load or change parameter value.
x x x The thermal motor model has tripped. After an overload trip, there will be no restart until
the pre-charge time has elapsed.
Remedy for unwanted tripping:
- check whether the motor rated operating current I
- change CLASS setting or
- reduce switching frequency or
- deactivate motor protection (CLASS OFF)
x Motor heat build-up is greater than the specified value for the "Prewarning limit motor heat
build-up" parameter. The thermal motor model approaches an overload trip according to
the selected value.
x Time for overload tripping of the thermal motor model is shorter than the specified value for
the "Prewarning limit remaining time for tripping" parameter.
x Applied main voltage is not suitable for the device or longer voltage peaks occur.
Remedy: apply correct voltage.
x A very high current has occurred (beyond the measuring range of the current transformers
integrated in the soft starter). This may happen in the case of: direct on-line starting,
breakaway pulse or combined braking.
Remedy: If the voltage ramp starting mode is selected, extend the set ramp time or lower
the breakaway voltage or the braking torque. The soft starter is possibly too small for the
motor.
Diagnostics and Messages
, the motor cannot be operated with this
e
, the motor cannot be operated with this
e
is not adjusted properly or
e
7-3