Status and Error Messages
6-23
LEVELING SENSOR FAILURE
Description: One or both of the LU and LD sensors have failed closed.
Troubleshooting: Ensure that power is not present on both the LU and LD inputs.
LEVELING UP
Description: The Level Up computer input is ON. Comes ON normally when the car is just below a
floor. If the car is level with the floor and a message appears, it is usually the result of a switch or
sensor problem.
Troubleshooting: Inspect the LU switch or sensor on the landing system and the placement of the
landing system vane or magnet for that floor.
LIGHT LOAD WEIGHER CONDITION
Description: The Light Load Weighing input is activated.
Troubleshooting: Ensure that Light Load Weighing is required. If not, set the Light Load Weighing
option to NO and ensure that the LLI input is not programmed. If Light Load Weighing is required,
ensure that the Light Load Car Call Limit is set to the correct number of stops.
LOSS OF DOOR LOCK OUT OF DOOR ZONE
Description: Door lock lost with elevator outside of door zone (i.e., outside of door zone and
leveling). May also be generated at speed if the door locks are clipped.
Troubleshooting: Inspect door lock circuitry and wiring. Check for any mechanical contact with
gate switch or door clutch (if restrictor used) and hoistway components.
LOW OIL SWITCH INPUT IS ACTIVATED (Hydro only)
Description: MLT shutdown with LOS. The car was unable to move at the expected speed due to
insufficient oil.
Troubleshooting: Check the MLT/VLT Data Trap (Addr 0495H bit 8). Ensure that there is sufficient
oil in the reservoir. Check the Low Oil switch and LOS input. 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.
M2L INPUT FAILURE
Description: The M2L input monitors the status of the relay contacts of SAFL and SAFS against the
circuits that drive these relay coils. Bus 2L should be 120VAC and relay SAFL should be picked only
if the doors are locked. 2MV bus must also be active.
Troubleshooting:
1. Check or replace relays SAFL and/or SAFS on the HC-CTL-2 board.
2. Verify that IDC terminal 2L on the HC-CTL board connects to IDC terminal 2L on the HC-DVR
board.
3. Check the thermal overload wiring 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).
MABB INPUT FAILURE (CTLA)
Description: The Bottom Access Bypass Monitor (door close contacts) (MABB) input monitors
proper operation of the solid state devices associated with bypassing the bottom hoistway door
contacts during access operation.
Troubleshooting: Remove the car from access operation and verify that test point TP41 (MABB)
on the HC-CTL board is low with respect to 1 bus.
MABBR INPUT FAILURE
Description: The Bottom Rear Access Monitor (door close contacts) (MABBR) input monitors
proper operation of the solid state devices associated with bypassing the bottom rear hoistway
door contacts during access operation.
Troubleshooting: Remove the car from access operation and verify that test point TP43 (MABBR)
on the HC-CTL-2 board is low with respect to 1 bus.
Table 6.1 Status and Error Messages
Scrolling Message - Special Event Message
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