Lenze MGXQK DC motors - Manual (Page 14)

14
6.4 Fault -- Cause -- Remedy
n
Maintain and repair the drive only when no
voltage is applied!
n
High temperatures of the motor surfaces.
Keep cooling times!
n Remove loads from the motor or secure
loads acting on the drive!
Interferences
Fault Cause Remedy
M t d t t t P l i t t d Ch k l t i l ti ( h t 5 4) Motor does not start Power s pply interr pted Check electrical connection (chapter 5 4) Motor does not start Power supply interrupted Check electrical connection (chapter 5.4) Motor does not start
Controller inhibited Check controller display check controller enable Controller inhibited Check controller display, check controller enable
No carbon br shes or not correctly installed Check if br sh set complete and placed correctly No carbon brushes or not correctly installed Check if brush set complete and placed correctly No carbon brushes or not correctly installed Check if brush set complete and placed correctly
(chapter 7.1)
(chapter 7.1)
Armat re coils defective or short-circ ited Remove short circ it (often only possible is a special Armature coils defective or short-circuited Remove short circuit (often only possible is a special
workshop or by the man fact rer)
workshop or by the manufacturer)
Excitation winding interr pted Remove interr ption Excitation winding interrupted Remove interruption
Motor does not start Brake does not release Check electrical connection Motor does not start
(high c rrent cons mption) Brake does not release Check electrical connection
(high current consumption)
Check air gap ’s
L
’ (see operating instr ctions of the
(high current consumption)
Check air gap ’s
Lü
’ (see operating instructions of the
brake) brake)
Magnetsp le berpr fen Magnetspule überprüfen
Drive is blocking Check for free r nning of components ( remove foreign Drive is blocking Check for free running of components ( remove foreign
matter if necessary)
matter, if necessary)
S rface temperat re > 90 5C Overload of the drive Check c rrent cons mption check load and red ce if Surface temperature > 90 5C Overload of the drive Check current consumption, check load and reduce, if
necessary
necessary
H t di i ti b t t d b d it Cl f f th d i Heat dissipation obstr cted by deposits Clean s rface of the drive Heat dissipation obstructed by deposits Clean surface of the drive
Cooling d cts inside the motor are obstr cted Remove deposits inside the motor Cooling ducts inside the motor are obstructed
by deposits Remove deposits inside the motor
by deposits
Motor s ddenly stops and does not Thermal contact interr pts power s pply Red ce load allow motor to cool (for cleaning see Motor suddenly stops and does not
start again Thermal contact interrupts power supply Reduce load, allow motor to cool (for cleaning see
above)
start again above)
Check cooling effect (direction of rotation) of the Check cooling effect (direction of rotation) of the
separate blower
Clean or replace filter element of the separate blower Clean or replace filter element of the separate blower
Uneven r nning motor stops for a Carbon br shes are worn Replace br sh set (chapter 7 1) Uneven running, motor stops for a
short time Carbon brushes are worn Replace brush set (chapter 7.1) g, p
short time
Carbon br shes are jamming abrasive matter Cleaning of the inner part (chapter 7 1)
short time
Carbon brushes are jamming, abrasive matter
in the g idance Cleaning of the inner part (chapter 7.1)
in the guidance
Winding contact in the armat re windings Repair in the workshop or by the man fact rer Winding contact in the armature windings Repair in the workshop or by the manufacturer
Bar contact at the collector Check collector and remove contact between the bars Bar contact at the collector Check collector and remove contact between the bars
Uneven running (vibrations) Insufficient balancing of coupling elements or Rebalancing Uneven running (vibrations) Insufficient balancing of coupling elements or
working machine Rebalancing
I fi i t li t f th d i t i R li hi t h k b if Ins ficient alignment of the drive train Re-align machine set check base if necessary Insuficient alignment of the drive train Re-align machine set, check base, if necessary
Fixing screws are not tightened Check screw connections and sec re Fixing screws are not tightened Check screw connections and secure
Excessive speed motor oscillates n Br sh yoke shifted from the ne tral zone Coincide colo r label at the br sh yoke and endshield Excessive speed, motor oscillates un- Brush yoke shifted from the neutral zone Coincide colour label at the brush yoke and endshield Excessive speed, motor oscillates un-
der load Brush yoke shifted from the neutral zone Coincide colour label at the brush yoke and endshield
der load
Interference of excitation current circuit Check excitation current and voltage, eliminate cause Interference of excitation current circuit Check excitation current and voltage, eliminate cause
of interference
Noise Carbon br shes are not r n-in S pport r n-in (chapter 7 1) Noise Carbon brushes are not run-in Support run-in (chapter 7.1)
Foreign matter inside the motor Cleaning of the inside area of the motor, repair by Foreign matter inside the motor Cleaning of the inside area of the motor, repair by
manufacturer, if necessary
Bearings damaged Replace bearings repair by man fact rer if necessary Bearings damaged Replace bearings, repair by manufacturer, if necessary
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