Troubleshooting
6-16 Manual # 42-02-1P21
DVR-’n’ MUFE FAILED TO ACTIVATE (n = 2 or 3) (Hydro only)
Description: The MUFE input monitors the status of the UFE triac and the UFE triac driver. When
either 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 UF and UFE should be 120VAC.
Troubleshooting:
1. Check the associated wiring.
2. Check the up fast valve coil.
3. Run the car up on inspection and verify that terminal UFE goes low.
4. The UFE triac may have failed open. Replace the HC-DVR board.
DVR-’n’ MUFE FAILED TO DEACTIVATE (n = 2 or 3) (Hydro only)
Description: The MUFE input monitors the status of the UFE triac and the UFE triac driver. When
either 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 UF and UFE should be 120VAC.
Troubleshooting:
1. Check the associated wiring.
2. Check the up fast valve coil.
3. The UFE triac may have shorted. Replace the HC-DVR board.
DVR-’n’ MUSE FAILED TO ACTIVATE (n = 2 or 3) (Hydro only)
Description: The MUSE input monitors the status of the USE triac and the USE triac driver. When
either 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:
1. Check the associated wiring.
2. Check the up fast valve coil.
3. Run the car up on inspection and verify that terminal USE goes low.
4. The USE triac may have failed open. Replace the HC-DVR board.
DVR-’n’ MUSE FAILED TO DEACTIVATE (n = 2 or 3) (Hydro only)
Description: The MUSE input monitors the status of the USE triac and the USE triac driver. When
either 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:
1. Check the associated wiring.
2. Check the up fast valve coil.
3. The USE triac may have shorted. Replace the HC-DVR board.
DVR-’n’ OLM INPUT FAILURE (n = 2 or 3) (Hydro only)
Description: The OLM input monitors the status of the both the thermal overload and the starter
overload contacts. 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 that IDC terminal 2L on the HC-CTL board connects to IDC terminal 2L on the HC-DVR
board.
2. Check the wiring of the thermal overload between terminals TO1 and TO2 on the HC-DVR
board.
3. Check the wiring of the starter overload between terminal OL1 and OL2 (if present).
Table 6.1 Status and Error Messages
Scrolling Message - Special Event Message
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