Curtis 1520 Controller Manual -

However, a common complaint among technicians and fleet managers is the difficulty of finding a complete, easy-to-read . The official documentation is dense, often spanning over 150 pages, and is not always distributed freely online by Curtis due to liability and dealer restrictions.

| Blink Code | Fault Name | Likely Cause | |------------|---------------------------|-------------------------------------------| | 1-2 | Battery Under-voltage | Low pack voltage or bad connection | | 2-3 | Throttle Fault | Broken wire or out-of-range (0-5V) signal | | 3-4 | Main Contactor Welded | Contactor stuck closed | | 4-1 | Motor Temperature Sensor | Thermistor open or shorted | | 5-3 | Encoder Signal Loss | Broken encoder wiring or bad motor sensor | | 6-2 | Over-temperature (Controller)| Heat sink or fan failure | curtis 1520 controller manual

From the manual, you will decode: