The Computer
5-92 Manual # 42-02-1P28 A3
MUSE FAIL TO ACT (591) Description: The MUSE input monitors the status of the USE triac and the
USE triac driver. When either one fails to activate when expected this fault
is generated. When the doors are locked, the 2L bus is high, USL1 and
USL2 limits are closed, the up normal limit (UNTD) is closed and the car is
idle, terminals US and USE should be 120VAC.
Troubleshooting:
Check the associated wiring.
Check the up fast valve coil.
Run the car up on inspection and verify that terminal USE goes low.
The USE triac may have failed open. Replace the HC-DVR board.
MUSE FAIL TO DEACT (592) Description: The MUSE input monitors the status of the USE triac and the
USE triac software output. When USE fails to deactivate when expected this
fault is generated. When the doors are locked, the 2L bus is high, USL1 and
USL2 limits are closed, the up normal limit (UNTD) is closed and the car is
idle, terminals US and USE should be 120VAC.
Troubleshooting:
Check the associated wiring.
Check the up fast valve coil.
The USE triac may have shorted. Replace the HC-DVR board.
NO DOOR ZONE FAULT FRONT
(193)
NO DOOR ZONE FAULT REAR (811)
Description: DZ signal not seen at end of run. Fault-bypassed in Construc-
tion/Inspection.
Troubleshooting:
Verify DZ system input, PLD Diag > PLD Inputs & CAR Diag > CAR Flags.
View DZ LED on HC-MPU-2-TS board.
NO LEVELING FAULT (195) Description: No leveling inputs detected during run. Fault-bypassed in
Construction/Inspection.
Code 1: ULM or DLM detected.
Code 2: Neither ULM nor DLM detected.
Troubleshooting:
Verify DLM, ULM system inputs, System IO > System Inputs.
NUDGING (37)
NUDGING REAR (784)
Description: The door is closing in nudging mode. Fault-bypassed in Con-
struction.
System Verifies: - Door Flags = Nudging
Troubleshooting:
Check for stuck PHE/DOB/Safe Edge.
Check for debris or obstruction in door track.
System IO > Programmed Inputs > PHE/DOB/SAFE EDGE.
OIL PRESS: RECALL FAIL (259) Hydro Only.
OIL PRESSURE: RECALL (100) Description: Hydro Only. Loss of positive pressure detected. The car is
recalling to the next available floor in the up direction. Cannot be bypassed.
OIL PRESSURE: SHUTDOWN (135) Description: Hydro Only. Loss of positive pressure detected. The car has
completed recall to the next available floor in the up direction. Cannot be
bypassed.
OIL PRESSURE: SWITCH ON (109) Description: Hydro Only. Loss of positive pressure detected. The car will
recall to the next available floor in the up direction. Cannot be bypassed.
Troubleshooting:
Verify proper function of valves, motor, and pump.
Check for obstructed return.
Table 5.10 Touch Screen Event Listings
Event Description
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