Troubleshooting Reference
Manual # 42-02-1P28 A3 5-105
UTL IS LOW (131) Description: The Up Terminal Limit switch has opened. If moving up, the
car will perform an emergency stop. This switch should not open unless the
car overshoots the terminal and opens the switch. The open switch pre-
vents further movement towards the terminal. Cannot be bypassed.
System Verifies:
- 2 bus has power.
- UTL input is low.
Troubleshooting:
If in error, verify switches and connections mechanically and electrically.
Check the state of the System IO > System Inputs > UTL, against the state
of the switch (touchscreen landing system flags).
VALVE TIME OUT SHUTDOWN (87) Description: Hydro Only. A hydraulic valve has been energized for an
excessive period of time with the car moving down. Motor/Valve Limit timer
may be set too low. If in motion, the car will stop immediately. The fault
must be manually cleared (power cycle or place on Inspection) before oper-
ation resumes. Cannot be bypassed.
System Verifies: - Motor Protection Data = VLT Fault
Troubleshooting:
Verify valve wiring is intact and is being energized.
Troubleshoot the hydraulic power unit.
VISCOSITY SWITCH: ON (112) Description: Hydro Only. The programmed VCI switch input is on. Oil flow
indicates variation in oil viscosity outside acceptable limits and the car is
lowering to the nearest floor below its current position or, if stopped in a
door zone, will remain at the floor. Once safely in a door zone, the car will
opens its doors and remove itself from service. If a temperature sensor
determines the oil is too cold and no calls are registered, the car will move
to the bottom landing (doors closed) and the pump motor will run without
valve coils energized to circulate and heat the oil. Fault-bypassed in Con-
struction.
System Verifies:
- Oil Data = Oil viscosity input is programmed
- Oil Data = Oil VCI recall is not true
WAITING FOR IN-CAR SW (336) Description: Informational. The car is at a recall floor with doors open
awaiting activation of the current mode of operation in-car switch.
WARNING: FLTS BYPASSED (187) Description: FAULTS ARE BEING BYPASSED. The fault bypass jumper on
the HC-MPU-2-TS board is in the BYPASS position and Utilities/Fault Bypass
is enabled for the active mode of operation (UTILS > Construct and Bypass
Faults).
YRD INPUT FAILURE (607) Description: The Y Contactor Redundancy (YRD) input monitors the nor-
mally closed auxiliary contact of the Y starter contactor.
Troubleshooting:
The wiring or devices connected to YR1 input may not be terminated.
Check the Y auxiliary contact wired to terminal YR1 and replace if neces-
sary.
Check the operation of the Y contactor.
Replace the HC-DVR board.
Table 5.10 Touch Screen Event Listings
Event Description
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