Troubleshooting Reference
Manual # 42-02-1P28 A3 5-75
DVR3 MSSD FAIL TO DEACT (677)
DVR4 MSSD FAIL TO DEACT (710)
Description: MSSD monitors the solid-state output of U1 and driver TY for
proper operation If either one fail in the on position this fault is generated.
When either one fails to deactivate when expected this fault is generated.
When the OL2 is 120VAC and the car is idle, terminal SSD should be low.
Troubleshooting:
1. Check terminal SSD wiring.
2. Replace the HC-DVR board.
DZF OUTPUT FAULT (EDGE) (150) Description: Measured DZ and the 24VDC discrete DZ do not match.
Fault-bypassed in Construction/Inspection.
System Verifies: - LS-EDGE-EL is the selected landing system.
Troubleshooting:
Check for back-fed wires at the cartop board.
When reader is sensing a DZ magnet (DZ LED on reader is on), there
should be 24VDC at DZ terminal.
Conversely, there should be about 0VDC at DZ terminal when reader is not
sensing DZ.
DZR OUTPUT FAULT (EDGE) (151) Description: Measured DZR and the 24VDC discrete DZR sent to the MC-
LSI do not match.
Troubleshooting:
1. Check for back-fed wires at the MC-LSI or HC-CTL-2 board.
When the reader is sensing a DZR magnet (DZR LED on the reader is on),
there should be 24VDC at the DZR_M terminal on the MC-LSI board.
Conversely, there should be about 0VDC at the DZR-M terminal on the MC-
LSI board when the reader is not sensing DZR.
EARTHQUAKE OPERATION (315) Description: The EQI and/or CWI input is/are active. The car is on earth-
quake operation. Logged when earthquake input is activated. Bypassed in
Construction bypass operation.
Troubleshooting:
Check state of inputs EQ SS and EQ CWT.
Check the status of the EQI and CWI inputs.
Check the counterweight derailment detection sensor. Check the seismic
activity sensor.
EARTHQUAKE RECALL (93) Description: The car is being recalled on earthquake operation.
EARTHQUAKE RUN (95) Description: The car has performed an emergency stop in response to EQ
SS and/or EQ CWT input activation, has recalled, and is subsequently mov-
ing at reduced speed in accordance to the selected earthquake code. Fault-
bypassed in Construction.
System Verifies: - Earthquake Data = EQ Run
Troubleshooting:
Press EQ RST on HC-MPU-2-TS board to reset.
EARTHQUAKE SHUTDOWN (94) Description: Per the selected earthquake code, the car has lowered to the
closest floor below its emergency stop position, opened its doors, and shut
down. Fault-bypassed in Construction.
System Verifies: - Earthquake Data = EQ Shutdown
Troubleshooting:
Press EQ RST on HC-MPU-2-TS board to reset.
Table 5.10 Touch Screen Event Listings
Event Description
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