Lenze EMB9352−C Manual do Utilizador descarregar pdf (Página 111)

Troubleshooting and fault elimination 9

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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

, −U

l Switch on mains

l Connect braking unit to the terminals

, −U

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

, −U

of the

controller

Connect braking unit to the terminals

, −U

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

, −U

of the

controller(s)

Connect braking units to terminals +U

−U

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)

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