Applicable Systems
AES-3
Symptoms
SJEC AES-3 elevator controller reports fault indicating control system issue requiring diagnostic evaluation of the elevator control system.
Possible Causes
- Door operator speed reference signal loss causing door movement halt
- Motor drive communication timeout on RS485 bus between controller and drive
- Car position correction request during high-speed travel mode
- Brake monitoring circuit detected brake engagement during travel
Troubleshooting Steps
- Step 1: Access AES-3 controller diagnostic via maintenance panel
Fault code with timestamp displayed on HMI - Step 2: Check RS485 communication cable connections at both ends
Cable firmly connected, shield properly grounded - Step 3: Verify car position encoder signal quality
Encoder signal shows clean pulses with no dropouts - Step 4: Test brake operation during inspection speed run
Brake releases smoothly at start and engages smoothly at stop
How to Reset
Reset by: 1) Correct the fault condition. 2) Reset controller from maintenance mode. 3) Run test trip. 4) Verify normal operation.
Common Replacement Parts
- SJEC-CTL-001: SJEC AES-3 controller board (Verify model compatibility)
Frequently Asked Questions
- Q: What causes brake engagement during travel?
Brake engagement during travel is a serious safety issue. It typically indicates brake monitoring relay failure, control relay contact welding, or software logic error. Immediate investigation by qualified personnel is required. Do not return the elevator to service until the cause is identified and corrected.
Source: SJEC AES-3 Elevator Controller Manual
Category: Elevator