Applicable Systems
Schindler Control System
Symptoms
Schindler 3300 AP controller displays fault indicating control system issue requiring diagnostic evaluation of the elevator control system and safety circuit integrity.
Possible Causes
- Door operator speed feedback signal loss during door open or close cycle
- Car position sensor calibration error causing floor leveling deviation
- Safety chain monitoring relay detected open circuit in safety loop
- Drive thermal model calculation indicating motor winding overtemperature
Troubleshooting Steps
- Step 1: Access 3300 AP controller via port terminal diagnostic interface
Fault code with detailed description shown in terminal output - Step 2: Check door operator speed encoder connection
Encoder signal shows clean pulses with no dropouts on oscilloscope - Step 3: Verify car position sensor calibration values
Position sensor reading matches mechanical floor indicator within 5mm - Step 4: Inspect safety chain for continuity using safety circuit test tool
Safety chain shows closed loop with all contacts functional
How to Reset
Reset by: 1) Investigate and correct fault condition. 2) Reset from service tool. 3) Run calibration check. 4) Verify normal operation before returning to service.
Common Replacement Parts
- 3300AP-CTL-01: Schindler 3300 AP controller module (Verify software version and configuration before replacement)
Frequently Asked Questions
- Q: How is the car position sensor calibrated?
The car position sensor is calibrated using the Schindler service tool. The elevator must complete a full travel learning run from bottom to top floor with the sensor calibration function enabled. The tool automatically calculates and stores the calibration parameters.
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Source: Schindler 3300 AP Service Manual
Category: Elevator
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