Troubleshooting Reference
Manual # 42-02-1P28 A3 5-89
MEB2 REDUNDANCY FAULT (320) Description: Checks the emergency brake activation logic. MEB2 should be
active every other run.
Troubleshooting:
Check connector at DSE/EB2 on SCE-HVI board. If connection is correct, go
to PLD DIAG > PLD INPUTS. View flag MEB2.
If MEB2 does not toggle every other run, contact MCE; possibly faulty SCE-
HVI board.
MHDB INPUT FAILURE (473)
MHDBR INPUT FAILURE (503)
Description: The (Front/Rear) Hoistway Door Bypass Monitor (MHDB/R)
input has detected a failure of the Rear Hoistway Door Bypass (HDB/R) or
(HDBB/R) outputs.
Troubleshooting:
Replace the HC-CTL-2 board.
MOTOR TIME OUT (10) Description: Failure of the car to reach a target floor in the allowed time.
Troubleshooting:
Modify motor limit timer to a value that allows car to run the entire hatch
without a fault.
Ensure that drive or starter is not shutting down during a run. There may
be a mechanical problem that prevents or slows the motion of the car.
MOTOR TIME OUT SHUTDOWN
(226)
Description: The CONFIG01 timer, MOTOR/VALVE TIME LIMIT has been
exceeded (typical 5 minutes; max 30 minutes).
Troubleshooting:
If car stalls in an express zone without door zone magnets it may take more
than 5 minutes to arrive at a landing. Increase timer setting to allow suffi-
cient time. Check event log for other events that may have prevented car
from moving. Verify no obstructions.
MPUA IS OFFLINE (142) Description: The MPU-B processor does not see any communication to
MPU-A.
Troubleshooting:
Check all shunt jumpers are in the correct position on the HC-MPU-2-TS
board.
MPUA: CAN COMM LOSS (11) Description: The HC-MPU-2-TS does not see any CAN communication.
Troubleshooting:
Check CAN cable between HC-MPU-2-TS and HC-CHP board.
Check all shunt jumpers are in the correct position on the HC-MPU-2-TS
board.
MPUB START UP (813) Description: The MPU-B processor logged that it has restarted.
MRD INPUT FAILURE (606) Description: The M Contactor Redundancy (MRD) input monitors the nor-
mally closed auxiliary contact of the M contactor.
Troubleshooting:
The wiring or devices connected to MR1 input may not be terminated.
Check the M auxiliary contact wired to terminal MR1 and replace if neces-
sary.
1. Check the operation of the M contactor.
2. Replace the HC-DVR board.
MSAFL1 INPUT FAILURE (464) Description: The MSAFL1 input monitors SAFL and SAFS relay contacts
against the circuits that drive the relay coils. Bus 2L should be 120VAC and
relay SAFL should be picked only if the doors are locked.
Troubleshooting:
1. Check or replace relays SAFL and/or SAFS on the HC-CTL-2 board.
2. Check mis-wiring to 2L terminal. If SALF is not picked, then we should
not read voltage on 2L.
Table 5.10 Touch Screen Event Listings
Event Description
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