| Error Code | Description | Common Root Causes | | :--- | :--- | :--- | | | CAN Bus Communication Fault | Terminating resistor missing; wiring corrosion; faulty car controller board (PCB). | | BCI_OFFL | Building Communication Interface Offline | LON or BACnet gateway failure; IP network misconfiguration. | | NO_GRP | No Group Communication | Car cannot talk to the Group Controller (GC); check ring topology wiring. | | E-3122 | Car Positioning Lost | Encoder drift combined with missing correction zone magnets. | Part 3: Step-by-Step Troubleshooting Guide for Top 3 Critical Codes 1. Troubleshooting DRV: OC (Overcurrent) Symptom: Elevator runs for 2-5 seconds, then jerks to a stop with a heavy thud. Controller shows OC.
| Error Code | Description | Common Root Causes | | :--- | :--- | :--- | | | Safety Chain (KSE) Open | Landing door lock open; car door lock open; emergency exit switch tripped; governor overspeed switch. | | E-1125 | Final Limit Switch (UL/DL) | Car overshoots top or bottom terminal landing; buffer switch activated; limit magnet misaligned. | | E-2001 | Door Zone (DZ) Missing | Inductor sensor fails to detect landing magnets; controller does not see floor zone. | | E-2105 | Door Close Timeout | Mechanical binding of doors; obstructed light curtain; worn door motor belt. | Category C: Communication & Group Control These affect dispatching and floor calls but rarely cause a full entrapment. schindler 5500 error codes
Unfortunately, Schindler does not publish a complete public master list of all 200+ error codes due to intellectual property restrictions. However, the codes listed above account for roughly 85% of all field issues. For the remaining 15%—specifically codes starting with SYS or PCB —you will need to connect the official Schindler Field Support Tool (FST) for deep-level diagnostics. | Error Code | Description | Common Root
| Error Code | Description | Common Root Causes | | :--- | :--- | :--- | | | Overcurrent (Instantaneous) | Short circuit in motor windings; defective IGBT module; brake not releasing mechanically. | | DRV: OV | Overvoltage (DC Bus) | Regenerative brake resistor failed; high line voltage; rapid deceleration with heavy load. | | DRV: UV | Undervoltage | Mains supply dip; blown input fuse; weak contactor coil. | | DRV: OH | Overtemperature | Heat sink fan failure; clogged air filter; high ambient temperature in machine room. | | E-4213 | Encoder (Resolver) Fault | Loose connector on motor resolver; broken cable; contaminated resolver inside motor. | | PMS_FLT | Permanent Magnet Sync Motor Fault | Phase loss; incorrect motor tuning (autotune failed); magnetic field mismatch. | Category B: Safety Chain & Door Circuit These codes prevent movement and are legally mandated stops. | | E-3122 | Car Positioning Lost |
Keep a physical logbook in the machine room. Note the timestamp, car load, and floor position for every error code. The pattern (e.g., E-4213 only occurs when passing floor 12) is often more valuable than the code itself. Disclaimer: Elevator repair involves high-voltage electricity and heavy moving parts. This guide is for informational purposes by trained professionals. Always follow local safety codes (ASME A17.1 / EN81) and use proper lockout/tagout procedures.