MCi iControl User Manual page 310

Troubleshooting
Table 6.3 iControl Messages
Excessive Brake Feedback Fault, EXCESS BRAKE FDBK FLT
Description: After each brake activity, the controller checks to see that brake current is bleeding off properly.
(After 1 second, brake voltage should be at or below 85% of the voltage applied by the last command.) This
fault is issued if brake voltage remains too high when checked by the controller.
Car Reaction: Emergency stop: Motor contactor and brake contactor immediately dropped.
Troubleshooting:
1. From the factory, RB (brake resistor circuit value) is set 3 to 5 times the brake coil resistance. Reduce RB
to allow current to bleed off more quickly. (Do not reduce RB below 3 times brake coil
refer to "Verifying Brake Current Resistance" on page
2. On the iView Brake screen, Timers tab, reduce Voltage Decay Time (minimum, 0.0 seconds).
3. Check Brake Voltage Feedback test point on iView Oscilloscope screen.
4. Check iField Brake Module connections.
5. Check brake and brake connections.
6. If you continue to see this fault after taking the above steps, you may have a defective brake module or
iBox Safety board.
Excessive Faults Shutdown, EXCESSIVE FAULTS
Description: When there are five faults that resulted in an Emergency, Control, or ASAP stop within ten nor-
mal runs, this fault is generated.
Car Reaction: Emergency stop: Motor contactor and brake contactor immediately dropped. This is a latching
fault. The Fault Reset button on the iBox must be pressed to clear it.
Troubleshooting:
1. Check Event Log to see what drive faults were generated before this fault was triggered. Refer to those
drive faults for troubleshooting information.
Excessive Motor Field Feedback Fault, EXCESS MF FDBK FAULT
Description: Excessive current was detected flowing through the motor field. Threshold is set to 85% of forc-
ing current for more than 4 seconds. If the fault is recurring, excessive faults will be generated and the
motor field module will be disabled.
Car Reaction: Emergency Stop.
Troubleshooting: Problem may be related to faulty motor field module, faulty iBox, or invalid motor field cal-
ibration.
1. If excessive faults (fault) has been generated, the module is disabled and should not be outputting any
voltage. If this is not the case, there may be a problem with the motor field module.
2. Calibrate the motor field. During calibration, the current and voltage should start at their maximum value
and decrease as calibration proceeds. If this is not the case, there may be a problem with the iBox.
Excessive Relevels Fault, EXCESS RELEVELS FAULT
Description: The car has failed to relevel after ten attempts.
Car Reaction: Cancel all calls and shutdown. The doors are cycled and the car remains shutdown until the
fault is reset by pressing the iBox Fault Reset button, toggling Inspection or cycling power to the controller.
Troubleshooting:
1. Check for mechanical or other failure preventing proper releveling.
2. Adjust brake and motor control during releveling with a full load in the car.
Excessive Restarts Fault, EXCESS RESTARTS FAULT
Description: The elevator has attempted to start movement from the same floor successively for an exces-
sive number of times. This fault is issued after twenty-five attempts. The counter is reset if the car makes
one successful run.
Car Reaction: Cancel all calls and shutdown. The doors are cycled and the car remains shutdown for five
minutes after the first fault or until the fault is reset by pressing the iBox Fault Reset button, toggling Inspec-
tion or cycling power to the controller.
Troubleshooting:
1. Check for mechanical or other failure preventing car from moving away from floor the floor.
6-34 Manual # 42-02-2222
iControl Messages
2-22.
resistance.)Please