Lenze EMB9352−C - Manual (Page 111)

Troubleshooting and fault elimination 9
l
111 EDBMB935X DE/EN/FR 13.0
9 Troubleshooting and fault elimination
Error Cause Remedy
Green LED is not lit No voltage at terminals +U G , −U G l Switch on mains
l Connect braking unit to the terminals
+U
G
, −U
G
of the controller
Controller sets pulse inhibit in
braking operation and reports
overvoltage
l Yellow LED is not lit Braking unit not connected to the
terminals +U
G , −U G of the
controller
Connect braking unit to the terminals
+U
G , −U G of the controller
Switching threshold set
incorrectly (switch S1, S2) Adapt switching thresholds of braking
unit and controller to the mains voltage
(see chapter 7.6)
l Yellow LED is lit Brake resistor not connected Connect brake resistor
Brake resistor dimensioned with
a too high impedance Use low−resistance brake resistor (if
permissible), possibly connect several
braking units in parallel
Irregular heating of the brake
resistors during parallel operation
of several braking units Braking units that are connected
in parallel are not connected to
terminals +U
G , −U G of the
controller(s)
Connect braking units to terminals +U
G
,
−U
G
of the controller(s)
Brake resistor not connected Connect brake resistor
Synchronisation not connected Connect synchronisation (see
chapter 7.7)
Switching thresholds of the
braking units which are
connected in parallel are not set
equally (switch S1, S2) Adapt switching thresholds of braking
unit and controller to the mains voltage
(see chapter 7.6)
Braking units not configured
correctly as master/slave Correct configuration (see chapter 7.7)
Yellow LED is lit continuously, the
brake resistor is overheating Switching threshold(s) of the
braking unit(s) set incorrectly
(switch S1, S2) Adapt switching thresholds of braking
unit and controller to the mains voltage
(see chapter 7.6)
Brake resistor is overheating Resistor is
dimensionedincorrectly l Select appropriate resistor for the
drive.
l For use of 9351:
– Possibly use 9352.
Switching threshold of the
braking unit set incorrectly
(switch S1, S2) Adapt switching thresholds of braking
unit and controller to the mains voltage
(see chapter 7.6)