iControl Messages
6-15
6
iControl DC
Brake Drop Fault, BRAKE DROP FAULT
Description: Indicates brake contact input (SP2D or Brake Switch) was not in the state required by the
“Brake is picked when SP2D or Brake Switch terminal is high (low)” parameter, indicating brake was not fully
dropped for more than one second after the car had stopped. This fault may be bypassed on the Controller >
Diagnostics > Fault Bypass tab by setting Brake Switch.
Car Reaction: Car is removed from service.
Troubleshooting:
1. Controller > Configuration > Brake > Control tab, check “Brake is picked when SP2D or Brake Switch ter-
minal is high (low)” to determine proper state of terminal SP2D or Brake Switch when brake is dropped
(See “Configuration - Brake Tab” on page 25.).
2. Verify operation of brake and brake switch (open or closed, see step 1) when the brake is fully dropped.
3. With the brake dropped, verify the state of input SP2D or Brake Switch (low or high, see step 1). Please
refer to “Installing Brake Monitoring” on page 3-20.
4. Use the iBox Fault reset button to clear the fault.
Brake Enable Fault
Description: When the brake module is enabled, a feedback signal is generated for the iBox. If the feedback
signal is not detected, this fault is generated.
Car Reaction: Emergency stop: Motor and brake contactors immediately dropped.
Troubleshooting:
1. Check the Brake Voltage Feedback test point on the iView Oscilloscope screen.
2. Check the iField Brake Module connections.
3. Check the brake and brake connections.
4. If brake feedback voltage is actually present, the iBox Safety board may be defective.
Brake Module Over Temperature Fault, BRAKE OVER TEMP FAULT
Description: Temperature sensor in the brake module detected an overheat condition.
Car Reaction: If the car is running, it will continue to answer current call. After the car is stopped at a floor,
the car will not be allowed to run until the overheat condition clears.
Troubleshooting:
1. Check for excessive machine room ambient temperature. (Should not exceed 104 degrees F or 40C.)
2. Verify that air enters through the bottom of the power box and is only expelled via the fan at the top of
the power box.
3. Check the running temperature inside the power box (should not exceed 105 degrees F).
4. Check for insufficient air circulation through the power box.
5. Check for improperly picking brake.
6. Check for faulty brake module.
7. Check for faulty connection between brake module and iBox.
Brake Output Circuit Failure, BRAKE OUTPUT FAILURE
Description: The flywheel brake IGBT has failed or the fuse has opened.
Car Reaction: Normal stop.
Troubleshooting:
1. Verify proper operation of the brake module while running on machine room inspection:
• Does the brake pick voltage match the setting on the Configuration > Brake tab?
• Does the brake hold voltage match the setting on the Configuration > Brake tab?
2. Verify proper operation of the brake module while performing the Brake Calibration:
• Does the voltage max out and then slowly ramp down to about 10% of maximum supply voltage?
• Does the current max out and then slowly ramp down to about 10% of maximum supply current?
If the brake module is constantly outputting maximum voltage and current based on the testing in steps 1
and 2, the main IGBT on the module is most likely damaged. The module must be replaced.
CAUTION: An open or damaged RB resistor can cause the IGBT to fail. Check the resistor by removing the
center tap and measuring the value of the entire resistor. It is strongly recommended to do this before
installing another brake module.
Table 6.3 iControl Messages
iControl Messages
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