WARNER ELECTRIC EUROPE - Rue Champfleur, B.P. 11095, F - 49182 St Barthélemy d’Anjou Cedex SM344gb - rev 01/06 5/5
8Troubleshooting and fault elimination
Troubleshooting
Fault
Brake does not
release
Brake does not
engage
Nuisance braking
Cause
•
Supply voltage too low
•
Power supply is interrupted
•
Airgap too large
•
Worn disc
•
Coil is damaged
•
Airgap too small
•
Overexcitation time too short
•
Voltage present at switch off position
•
Grease on friction faces
•
Holding voltage too low
•
Wrong information from microswitch
Remedy
•
Adjust starting voltage
•
Reconnect power supply, check the adjustment of microswitch
•
Re-adjust the airgap (chapter 4.1)
•
Change disc and reajust the airgap
•
Replace the brake
•
Re-adjust the airgap (chapter 4.1)
•
Increase overexcitation time
•
Check the microswitch’s adjustment and the customer’s
power supply
•
Clean the friction faces, change the disc
•
Adjust the holding voltage
•
Re-adjust the microswitch
Emergency braking : for emergency braking the
switching OFF must be connected on DC current
side, in order to obtain short engaging time of the brake
Service braking : for service braking, the switching OFF
and the switching ON must be connected on AC current
side, in order to obtain silent switching.
The connecting wires must be thick enough to help prevent
sudden drops in voltage between the source and the brake.
Tolerances on the supply voltage at the brake terminals
+5% / -10% (NF C 79-300).
Part Part number
Friction disc BT 2 12 095100
Microswitch NF BT 2 12 095145
O-ring Kit BT 2 12 095227
6Spare parts
7Tools
Tools Function
Airgap adjustment shims Airgap and microswitch adjustment
Open jawed spanner 21 mm A/F Airgap adjustment
Torque wrench (measurement range > 140 Nm) with hexagonal socket insert 10 mm A/F Airgap adjustment
Open jawed spanner 7 mm A/F Microswitch adjustment
Multimeter Voltage checking
Hexagon wrench key 6 mm A/F Transport screws
To Next Page
Loading...
