The Computer
5-54 Manual # 42-02-1P28 A3
CTLA CARTOP IN BTN FAIL (416) Description: The CTL-2 board sees the cartop inspection up or down but-
ton is being activated while the car is not on cartop inspection. It is declar-
ing that the button is stuck closed.
Troubleshooting:
Check Cartop Inspection up and down buttons.
Check wiring to Cartop Inspection up and down buttons.
CTLA: CTLB IS OFFLINE (404) Description: CTLA processor does not see communication from CTLB pro-
cessor.
Troubleshooting:
Verify all shunt jumpers on the HC-CTL-2 board are correct.
CTLA CYCLE TEST FAILURE (426) Description: A cycle test (exercise operation) of the brake and motor con-
tactors is conducted before the car is allowed to move from a landing. This
message will be displayed if the cycle test fails.
Troubleshooting:
Check brake and motor contactors (refer to job prints for guidance).
CTLA DCAB INPUT FAILURE (395) Description: The Bottom Access Door Contact (DCAB) input monitors the
bottom door closed contacts. DCAB should be 120VAC during bottom
access operation and Bottom Access switch is toggled in the up or down
position.
Troubleshooting:
1. Verify 120VAC on the 2S bus.
2. Check that all hoistway doors are closed except for the bottom access
hoistway door.
3. Check for 120VAC on the DCMS terminal.
CTLA DIRECTION MISMATCH (380)
CTLB DIRECTION MISMATCH (455)
Description: The processor has detected that the commanded run direc-
tion
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 MCLSI 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 the positioning system.
5. Check position sensor for excessive dirt or clogging.
CTLA DN NORMAL LIM OPEN (369)
CTLB DN NORMAL LIM OPEN (444)
Description: The indicated processor has detected that the down direc-
tional limit switch is open. The car will run no further in the down direction.
Troubleshooting:
1. Review car adjustment and landing settings.
2. Adjust as required to prevent the car from overshooting the terminal and
activating the directional limit.
3. Review terminal switch programming in the CONFIG 2 menu
CTLA DPM RED. FAULT (423) Description: A failure of a front door input, relay or associated circuitry
has been detected. This logic detects failure of the input structure and
hardware associated with the DPM (Door Position Monitor) input.
Troubleshooting:
1. Verify that when DLK is ON (1) DPM is also ON (1). When DOL = 0, DPM
= 0.
2. Verify that DPM makes (120Vac) 1” to 2” prior to door lock while doors
are closing.
3. Check the associated input circuitry.
Table 5.10 Touch Screen Event Listings
Event Description
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