The Computer
5-56 Manual # 42-02-1P28 A3
CTLA EEPROM FAULT (378)
CTLB EEPROM FAULT (453)
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 electri-
cal noise.
3. If the error occurred while updating firmware, re-attempt the update
procedure.
CTLA EXCESSIVE FAULTS (360)
CTLB EXCESSIVE FAULTS (435)
Description: The named processor has detected faults beyond an estab-
lished limit in a circumscribed 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.
CTLA FLOOR LRN REQUIRED (387)
CTLB FLOOR LRN REQUIRED (462)
Description: The landing system floor heights were not learned with the
current controller and landing system configuration. This fault can occur if
the HC-CTL-2 board or landing system is replaced.
Troubleshooting:
1. Relearn floor heights.
CTLA HOIST BYP SW FAIL (398)
CTLA R. HOIST BYP SW FAIL (428)
Description: The expected input logic from the HOISTWAY DOOR BYPASS
switch has failed.
Troubleshooting: Replace the HC-CTL-2 board.
CTLA INA INPUT FAILURE (402) Description: The INA input to the micro controller did not receive a signal
when expected.
Troubleshooting:
1. Check for incorrect wiring or short on the HC-CTL-2-TS board INA input
and 2 bus.
2. Replace the HC-CTL-2 board.
CTLA INCAR IN BTN FAIL (405) Description: The CTL-2 board sees the In-Car inspection up or down but-
ton is being activated while the car is not on In-Car inspection. It is declar-
ing that the button is stuck closed.
Troubleshooting:
Check In-Car Inspection up and down buttons.
Check wiring to In-Car Inspection up and down buttons.
CTLA INCP INPUT FAILURE (401) Description: The Car Panel Inspection INSP/Auto Switch input (INCP) is
high while the 2 bus is low.
Troubleshooting:
1. Check for incorrect wiring or short on the HC-CTL-2-TS board INCP input
and 2 bus.
2. Replace the HC-CTL-2 board.
CTLA INCT INPUT FAILURE (403) Description: The Car Top Inspection INSP/AUTO Switch input (INCT) is
high while SAFH is low.
Troubleshooting:
1. Check for incorrect wiring or short on the HC-CTL-2 board INCT input and
SAFH or 2 bus.
2. Replace the HC-CTL-2 board.
Table 5.10 Touch Screen Event Listings
Event Description
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