Troubleshooting
6-30 Manual # 42-02-1P21
MTY INPUT FAILURE (Hydro only)
Description: The input monitors the continuity of the Y Contactor coil and also checks the OFF
state of the (TY) triac.
Troubleshooting:
1. Verify that the STARTER #1 TYPE parameter is set to the correct type, WYE-DELTA.
2. Check the termination of the left hand Y contactor coil at terminal YD1 on the HC-DVR board.
3. Check the normally closed auxiliary contact of DEL that feeds the right hand coil of Y.
MUFE FAILED TO ACTIVATE (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.
MUFE FAILED TO DEACTIVATE (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.
MUFE INPUT IS LOW (CTLB) (Hydro only)
Description: The MUFE input monitors the continuity of the Up Fast Valve coil and also checks the
OFF state of the UFE triac.
Troubleshooting:
1. Check the termination of the valve coil at terminal UFE on the HC-DVR board.
2. Check terminal UF for 120VAC with respect to 1 bus.
MUSE FAILED TO ACTIVATE (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.
MUSE FAILED TO DEACTIVATE (Hydro only)
Description: The MUSE input monitors the status of the USE triac and the USE triac software out-
put. 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:
1. Check the associated wiring.
2. Check the up fast valve coil.
3. The USE triac may have shorted. Replace the HC-DVR board.
Table 6.1 Status and Error Messages
Scrolling Message - Special Event Message
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