Wöhner MOTUS - Diagnostic function

23Revision 6, status 05.2017
English.
Diagnostic function
Via various diagnostic functions, the hybrid motor
starter is able to identify and signal a range of errors,
such as overcurrent, asymmetry, phase failure or self-
test errors.
ɴ A self-test is carried out before each power-on
process. If a problem is detected, the device does not
power on and instead displays the message “Error
during self-test”. Errors can be caused by defects in
the power electronics or insulation faults in periph-
eral equipment. An “Error during self-test” cannot be
acknowledged and is stored internally in the device.
In case of repetition of the “Error during self-test”,
the device cannot be put into operation again — it
must be replaced (safety precaution).
ɴ If an error is detected, the device immediately
switches to a safe, shutdown state.
ɴ To exit the safe, shutdown state, the corresponding
error acknowledgement is required.
Error acknowledgement
Three different options are available for error acknowl-
edgement.
Manual (set / reset button)
Press the set / reset button on the front of the device.
If the set / reset button is still being pressed after approx.
2s, the hybrid motor starter adopts an error state again. If
the acknowledgement request (actuated set/reset but-
ton) is active for more than 6s, an advanced test is con-
ducted for the power output module and then a switch
performed to the „Parameterization“ operating mode.
Status LED description
PWR
Green
Err
Red
L
Yellow
R
Yellow
96
97
95
96
Error
acknowledgement
OFF No supply voltage (control supply voltage) presentAAAA01 –
Operational readiness Supply voltage (control supply voltage) present E A A A 0 1 –
Drive switched on ɴðkok|UU<U3ɷÔɸ EAEA01
ɴ»\kkk|UU<U3ɷðɸ EAAE01
Error during self-test
Detection of a deviation, an insulation fault in the
peripheral circuits equipment or a fault in the device
— the device must be replaced
E E A A 1 0 not
possible
Internal error in
controller or I/O
devices (maintenance
requirement, NE44)
Bimetal function:
The motor current is higher than
the nominal motor current specification (e.g. class
10A): Cooling time running! ( 20 minutes)
Countdown of cooling period (20min) only starts
ɴ±kk\k<Ukkok|UU<U3ɓ EBEA10Automatic
ɴ±kk\k<U(\kkk|UU<U3ɓ EBAE10Automatic
After 2 minutes, the „L“ or „R“ flashes:
A manual reset is possible.
Error restoring the system state:
Checksum erroneous. The thermal memory of the
bimetal function is set to the max. value. The error
must be manually acknowledged, also in automatic
mode.
EBBB10 Manual
Symmetry: The motor currents deviate from each
other by more than 33%.
EBAA10Manual
Phase failure: Phase failure with pending
control voltage
ɴ±kk\k<Ukkok|UU<U3ɷN(wk\ww<\Uɸɓ BBEA10Automatic
ɴ±kk\k<U(\kkk|UU<U3ɷk<39wk\ww<\Uɸɓ BBAE10Automatic
Possible causes: minimum current not achieved,
below 0.06A (0.6A), 0.15A (2.4A), 1.2A (9A)
fault in mains voltage, fuses have been triggered,
motor line interrupted
Blocking: The max. measurable motor current is
exceeded for more than 2s.
ɴ±kk\k<Ukkok|UU<U3ɓ EBBA10Manual
ɴ±kk\k<U(\kkk|UU<U3ɓ EBAB10 Manual
Explanation: A = LED switched off / E = LED permanently lit / B = LED fl ashes at a frequency of 2Hz (50:50)