Status and Error Messages
6-7
CTL A MPU A IS OFFLINE
Description: CPU-A on HC-MPU board is not responding.
Troubleshooting:
1. Verify that CPU-A ON LED on the HC-MPU board is on solid and not flashing.
2. Check the CAN connection to the HC-MPU and HC-CHP board.
3. Check the CAN connection to the HC-CTL-2 and HC-CHP board.
4. Check power connections to the HC-MPU board.
CTL-A or B ACTUAL AND REQUESTED DIRECTION MISMATCH
Description: The processor has detected that the commanded run direction does not match the
data reported by the positioning system. Power will be removed from brake and motor to bring the
car to an immediate halt.
Troubleshooting:
1. Check CAN bus connections from landing positioning sensor to cartop box MC-LSI board.
2. Check CAN bus connections from MC-LSI board to HC-CTL-2 board in controller.
3. Check 24V power to MC-LSI board in cartop box.
4. Check condition and proper installation of encoded tape for positioning system.
5. Check position sensor for excessive dirt or clogging.
CTL A or B EEPROM FAULT
Description: A device error has been detected during a cyclic redundancy check (code=1) or while
reading from or writing to the device (code=2).
Troubleshooting:
1. Reset the microprocessor.
2. Check for recently installed equipment that might be generating electrical noise.
3. If the error occurred while updating firmware, re-attempt the update procedure.
CTL A or B EXCESSIVE FAULTS SHUTDOWN
Description: The named processor has detected faults beyond an established limit in a circum-
scribed period of time.
Troubleshooting:
1. Check the connections to and from the HC-CTL-2 board.
2. Reset the microprocessor.
3. Test elevator for proper operation.
CTL A or B INCORRECT LANDING SYSTEM CHANNEL DETECTED
Description: The named processor has detected that its associated CAN connection from the land-
ing system is not reporting the correct channel identification. Usually, this means that the CAN 1
and CAN 2 connections from the hoistway position sensor to the HC-CTL-2 board have been
“swapped” at the HC-CTL-2 board connector.
Troubleshooting:
1. Exchange the CAN 1 and CAN 2 connections on the HC-CTL-2 board connector.
Table 6.1 Status and Error Messages
Scrolling Message - Special Event Message
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