Applicable Systems
Schindler Control System
Symptoms
UL3 (upper final limit) signal disabled
Possible Causes
- UL3 limit switch disabled or bypassed
- switch malfunction
- configuration change
Troubleshooting Steps
- Step 1: Check UL3 limit switch
Verify the fault is resolved after completing this step. - Step 2: verify switch operation
Verify the fault is resolved after completing this step. - Step 3: inspect wiring
Verify the fault is resolved after completing this step.
How to Reset
Power cycle after switch check
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Source: book118 Bionic 3300 diagnostic manual; diantijob.com/175389.html
Category: Elevator
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