Troubleshooting Reference
Manual # 42-02-1P28 A3 5-57
CTLA LAND SYS COMM LOSS (359)
CTLB LAND SYS COMM LOSS (434)
Description: The HC-CTL2 board is not communicating with the landing
system properly (A or B channel lost). Before beginning troubleshooting,
check all related CAN connections and connectors carefully.
Troubleshooting:
CHANNEL A
1. If the lost channel is the A (CAN 2) channel, verify cartop mounted UIO
board baud rate selection is correct. Next, unplug all HC-CPI (control panel
interface) and HC-UIO (universal I/O) board CAN connections from the MC-
LSI (landing system interface board) on the cartop (CAN 2 is a shared bus).
Recheck the display to see if both channels are now back on line.
2. If the LS-EDGE channels are now OK, reconnect the UIO boards one at a
time. If the channel is lost, check the CAN terminations on the UIO board. If
the board is terminated, open the termination by moving the jumper so the
header pins are not shorted. Repeat for additional UIO boards, checking LS-
EDGE information as you go.
3. Check the car panel interface boards to see that only the last board in
the string is terminated (CAN). Reconnect the CPI boards. Check LS-EDGE
information. If the A channel is lost again as you reconnect boards, contact
MCE support for help in isolating the bad board or termination.
4. If, after disconnecting the CPI and UIO boards, the A channel remained
off line, temporarily connect CAN 1 connections to CAN 2 on the HC-CTL-2
board. Place the processor F3 switch down and check the error code on the
display:
• CTL-A INCORRECT LANDING SYSTEM CONNECTED - replace LS-EDGE.
• CTLA-A LANDING SYSTEM COMM LOSS - continue numbered steps.
5. Temporarily connect CAN 2 connections to CAN 1 on the HC-CTL-2 board.
If the message changes to CTL-B INCORRECT LANDING SYSTEM CON-
NECTED, replace the HC-CTL-2 board.
CHANNEL B
1. If the lost channel is the B (CAN 1) channel, temporarily connect CAN 2
to CAN 1 on the HC-CTL- 2 board.
2. If the display changes to CTL-B INCORRECT LANDING SYSTEM CON-
NECTED, replace the HC-CTL- 2 board.
3. If the message remains CTL-B LANDING SYSTEM COMM LOSS, replace
the LS-EDGE reader head.
CTLA MABB INPUT FAILURE (393) Description: The Bottom Access Bypass Monitor (door close contacts)
(MABB) input monitors proper operation of the solid-state devices associ-
ated with bypassing the bottom hoistway door contacts during access oper-
ation.
Troubleshooting:
Remove the car from access operation and verify that test point TP41
(MABB) on the HC-CTL-2 board is low with respect to 1 bus. If not, contact
MCE for assistance.
CTLA MCSB INPUT FAILURE (397) Description: The Car Stop Bypass Monitor (MCSB) input on the HC-CTL-2
board is active while the car stop bypass circuit is not active.
Troubleshooting:
This fault indicates a failure of the HC-CTL-2 board.
CTLA MDSE INPUT IS LOW (412) Description: The MDSE input monitors the continuity of the DN Slow Valve
coil and also checks the OFF state of the DSE solid state device.
Troubleshooting:
1. Check the termination of the valve coil at terminal DSE on the HC-DVR
board.
2. Check terminal DS for 120VAC with respect to 1 bus.
Table 5.10 Touch Screen Event Listings
Event Description
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