manufactures passenger, freight, and service elevators under Otis technology licenses. A manual labeled with “UPD” typically means:
Before beginning startup, ensure all wiring and mechanical assembly are complete. Safety Check
| Code | Fault Name | Likely Cause & Manual Solution | |------|------------|--------------------------------| | OC1 | Overcurrent at acceleration | Short circuit in motor winding. Check insulation resistance (manual page 4-12). | | OC2 | Overcurrent at deceleration | Regenerative overload. Add braking resistor or adjust decel time (F02). | | OV1 | Overvoltage | Mains input too high or decel too aggressive. Measure input; increase F02 by 0.5 sec. | | UV | Undervoltage | Phase loss on R, S, T input. Check main contactor and fuses. | | OL | Overload | Mechanical jam in guide rails or door lock. Reduce counterweight ratio per manual. | | Encoder Fault (E.Enc) | Feedback loss | Broken encoder wiring or shield grounding issue. Manual shows pinout to test. |