34
BREAKER
MAINTENANCE
The switch will not open mechanically
The switch will not open electrically (with opening or minimum voltage uncoupler)
The switch will not close mechanically
The switch will not close electrically
The switch will not close, closes and reopens immediately or closes and reopens after a short period of service
The moving part will not enter the fixed part (or enters with excessive force)
The moving part cannot be extracted from the fixed part
The motor wil l not recharge the spri ngs
Both switches can be closed simultaneously in an interlock
One of the two switches in an interlock cannot be closed (with the other switch open)
The closing bobbin, the opening uncouplers or the motor command are burnt out
Error/fault or alarm message (WARN) on the M-Pro 20 uncoupler display unit (or the “Warn/Alarm” LED blinking)
Irregular pulsing of the “Healthy” LED (or LED off) on the M-Pro 20 uncoupler
Abnormal pulsing (permanently on, permanently off, blinking) of the M-Pro 17+ relay LED
The switch will open if the springs are loaded when it is closed
CAUSES REMEDIES
X
The fixed part is being executed or is in a different
frame to the moving part Change the fixed or moving part
X
The two parts of the lock to prevent incorrect switch
insertion are incompatible
Change the fixed or moving part / replace the block
if fixed and moving part are compatible
X X X X X X Defective kinematic motion Contact GE Consumer & Industrial (page 36)
XX
The opening bobbin power supply voltage is
inadequate
Measure the power supply voltage: it must be
between 0.7Vn and 1.1Vn forcurrent launching
bobbins and between 0.35Vn and 0.70Vn for
minimumvoltage bobbins
X X X X The auxiliary circuit cabling is incorrect
Check the cabling using the wiring diagrams
contained in the installationmanual
X
The opening uncoupler (on current launching or of
minimumvoltage) is positioned incorrectly Check the correct positioning of the uncoupler
X X The minimum voltage uncoupler is faulty Replace the minimum voltage uncoupler
X
The opening uncoupler (on current launching or of
minimumvoltage) is faulty Replace the uncoupler
X X The closing uncoupler is faulty Replace the closing uncoupler
XX
The closing bobbin power supply voltage is
inadequate
Measure the power supply voltage: it must be
between 0.85Vn and 1.1Vn
X The closing bobbin is fitted incorrectly
Check the correct positioning of the closing bobbin
in its housing
X X The motor power supply voltage is inadequate
Measure the power supply voltage: it must be
between 0.85Vn and 1.1Vn
X
The electronic uncoupler has not been reset after
anintervention Press the electronic uncoupler RESET key
X
The minimum voltage uncoupler is not powered
correctly
Measure the power supply voltage: it must be
between 0.85Vn and 1.1Vn
X
The opening bobbin on current launching is
permanently powered
Cut permanent power to the opening bobbin /
check the cabling
X X The kinematic motion springs are unloaded Load the springs (manually or electrically)
X The switch opens due to protection relay cut-in
Check the relay intervention thresholds and, if
necessary, the presence in thesystem of causes
that could determine the cutting in of this relay
X X The interlock is not adjusted correctly Adjust the interlock
X
The extraction operations (page 20) have not been
performedcorrectly
Ensure that: the padlocks have been removed from
the lower panel of theextractable base; the safety
device for operating the crank has been
unlockedand the crank turned from the
DIS CONNE CTE D position to the stop one ; thatthe
springs are unloaded.
X Presence of a fault
Read the fault message on the display unit and
refer to pages 80-85 of thismanual
X The uncoupler is not powered correctly
Check correct operation using a tester or an
auxiliary power supply; contactBticino if the
outcome is not positive
X The relay shows an operating defect Contact M-Pact Plus
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