The Computer
5-58 Manual # 42-02-1P28 A3
CTLA MGB INPUT FAILURE (400)
CTLA MGBR INPUT FAILURE (404)
(430)
Description: A failure of the gate switch bypass circuit has been detected.
Troubleshooting:
Replace the HC-RDR board.
CTLA MGS INPUT FAILURE (392) Description: The Gate Switch Monitor (MGS) input has detected a failure
of the gate switch or Door Zone/Door Zone Leveling (DZ/DZLVA) circuitry.
Troubleshooting:
1. Check the condition of the gate switch.
2. Replace relay GS.
3. Replace relay DZ.
4. Check continuity between IDC terminals GS1 and GS2 on the HC-CTL-2
board.
5. If rear doors are present, check GSR.
6. Replace the HC-CTL-2 board.
CTLA MGSR INPUT FAILURE (425) Description: The Rear Gate Switch Monitor (MGSR) input (test point TP48
(GSR2) on the HC-RDR board) has detected a failure of the rear gate switch
or Door Zone/Door Zone Leveling (DZ/DZLVA) circuitry.
Troubleshooting:
Condition 1: MGSR should be low during automatic operation when either
the rear gate or rear hoistway doors are open as indicated by the GSR and
DLR relays, except during re-leveling. If either relay GSR or DLR is not
picked, verify that TP48 is low.
Check continuity between terminals GS1 on the HC-CTL-2 and GSR1 on the
HC-RDR board and between terminals GS2 on the HC-CTL-2 and GSR2 on
the HC-RDR board.
Condition 2: If the car is re-leveling, and the front doors are closed, the
MGSR input should have 120VAC.
Check continuity between terminals GS2 on the HC-CTL-2 and GSR2 on the
HC-RDR board.
Condition 3: This fault is also generated if relays GSR and DLR are picked
indicating that the rear gate and hoistway doors are closed, but the MGSR
input is low.
1. Verify that both relays DLR and GSR are picked.
2. Verify 120VAC on terminals GSR1 and GSR2.
3. Verify 120VAC on TP49 (MDLR) on the HC-RDR board.
4. Verify 120VAC on TP48 (GSR2) on the HC-RDR board.
CTLA: MPU IS OFFLINE (364) Description: CPU-A on HC-MPU-2-TS board is not responding.
Troubleshooting:
1. Verify that CPU-A ON LED on the HC-MPU-2-TS board is on solid and not
flashing.
2. Check the CAN connection to the HC-MPU-2-TS 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.
CTLA MTD INPUT FAILURE (409) Description: The input monitors the continuity of the DEL contactor coil
and also checks the OFF state of the (TD) triac.
Troubleshooting:
1. Verify that the STARTER #1 TYPE parameter is set to the correct type,
WYE-DELTA or ACROSS THE LINE.
2. Check the termination of the left hand DEL contactor coil at terminal DD1
on the HC-DVR board.
3. Check the normally closed auxiliary contact of Y that feeds the right-
hand coil of DEL.
4. Replace the HC-DVR board.
Table 5.10 Touch Screen Event Listings
Event Description
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