Status and Error Messages
6-27
MHDBR INPUT FAILURE (RDRB)
Description: The Rear Hoistway Door Bypass Monitor (MHDBR) input has detected a failure of the
Rear Hoistway Door Bypass (HDBR) or (HDBBR) outputs.
Troubleshooting:
1. Toggle the door bypass switch on the HC-CTL-2 board a few times, then make certain it is fully
in the ON or OFF position.
2. Briefly disconnect then reconnect CAN connection to RDR board to reset processors.
MOTOR LIMIT TIMER (ANTI-STALL) ELAPSED
Description: The Starter Overload or the Thermal Overload has tripped, or there is a mechanical
problem that prevents or slows the motion of the car.
Troubleshooting: To clear the fault condition, on the HC-CTL board, place the car on Machine
Room Inspection, press the FAULT RESET button, then return the car to Normal operation. Immedi-
ately check the starter and thermal overloads and all circuitry associated with the motor.
MPI SPA IS OFFLINE, MPI SPB IS OFFLINE, MPI SPC IS OFF LINE
Description: These messages are Motion 4000 Traction related.
Troubleshooting: Verify that CONTROLLER TYPE in the PROGRAM MODE (F1) BASIC FEATURES
MENU is set to HYDRO (M2000).
MRD INPUT FAILURE
Description: The M Contactor Redundancy (MRD) input monitors the normally closed auxiliary
contact of the M contactor.
Troubleshooting:
1. The wiring or devices connected to MR1 input may not be terminated.
2. Check the M auxiliary contact wired to terminal MR1 and replace if necessary.
3. Check the operation of the M contactor.
MSAFL1 INPUT FAILURE (CTLB)
Description: The MSAFL1 input monitors the status of the relay contacts of SAFL and SAFS against
the circuits that drive these relay coils. Bus 2L should be 120 Vac and relay SAFL should be picked
only if the doors are locked. If on Inspection, direction must be established also.
• This fault is generated if test point 2L, on the HC-CTL board, measures 120VAC to ground while
one of the following is true:
1. Test point SAFLA is 0VAC
2. Test point SAFLB is 120VAC
3. Test point MGS, on the HC-CTL board, is 0VAC
4. Test point MSAFS1 is 0VAC
5. Safety bus terminal 2S, on the HC-CTL-2 board, is 0VAC.
Troubleshooting:
1. Check or replace relays SAFL and/or SAFS on the HC-CTL-2 board.
2. Check that terminal 2L on the HC-CTL-2 board connects to IDC terminal 2L on the HC-DVR
board.
3. Check the wiring of the thermal overload between terminals TO1 and TO2 on the HC-DVR
board.
4. Check the wiring of the starter overload between terminal OL1 and OL2 (if present).
5. Replace the HC-CTL-2 board.
MSAFS1 INPUT FAILURE (CTLA)
Description: The MSAFS1 input monitors the status of the relay contacts of SAFL and SAFS
against the circuits that drive these relay coils. Relay SAFS should be picked only if the safety string
is made.
Troubleshooting:
1. Check or replace relays SAFL and/or SAFS on the HC-CTL-2 board.
2. Check wiring associated with screw terminals SAFH, SAFC and ESC.
Table 6.1 Status and Error Messages
Scrolling Message - Special Event Message
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