Troubleshooting And Fault Elimination - Lenze EMB9351-E Instructions De Mise En Service

9

Troubleshooting and fault elimination

Error
Green LED is not lit
Controller sets pulse inhibit in
braking operation and reports
overvoltage
l Yellow LED is not lit
Yellow LED is lit
l
Irregular heating of the brake
resistors during parallel operation
of several braking units
Yellow LED is lit continuously, the
brake resistor is overheating
Brake resistor is overheating
EDBMB935X DE/EN/FR 12.0
Troubleshooting and fault elimination
Cause
No voltage at terminals +U
Braking unit not connected to the
terminals +U , −U of the
G G
controller
Switching threshold set
incorrectly (switch S1, S2)
Brake resistor not connected
Brake resistor dimensioned with
a too high impedance
Braking units that are connected
in parallel are not connected to
terminals +U , −U of the
G G
controller(s)
Brake resistor not connected
Synchronisation not connected
Switching thresholds of the
braking units which are
connected in parallel are not set
equally (switch S1, S2)
Braking units not configured
correctly as master/slave
Switching threshold(s) of the
braking unit(s) set incorrectly
(switch S1, S2)
Resistor is
dimensionedincorrectly
Switching threshold of the
braking unit set incorrectly
(switch S1, S2)
l
Remedy
, −U Switch on mains
l
G G
Connect braking unit to the terminals
l
+U , −U of the controller
G G
Connect braking unit to the terminals
+U , −U of the controller
G G
Adapt switching thresholds of braking
unit and controller to the mains voltage
(see chapter 7.6)
Connect brake resistor
Use low−resistance brake resistor (if
permissible), possibly connect several
braking units in parallel
Connect braking units to terminals +U
−U of the controller(s)
G
Connect brake resistor
Connect synchronisation (see
chapter 7.7)
Adapt switching thresholds of braking
unit and controller to the mains voltage
(see chapter 7.6)
Correct configuration (see chapter 7.7)
Adapt switching thresholds of braking
unit and controller to the mains voltage
(see chapter 7.6)
Select appropriate resistor for the
l
drive.
For use of 9351:
l
– Possibly use 9352.
Adapt switching thresholds of braking
unit and controller to the mains voltage
(see chapter 7.6)
9
,
G
111