E-16Â Internal Resistor Overheat fault in Toshiba drive
E-16 Internal Resistor Overheat fault in Toshiba drive
Description Many smaller Toshiba drives (under 20HP) come with a built-in Dynamic Braking Resistor tucked inside the heatsink. E-16 indicates that this *internal* resistor is overheating. This is distinct from "OLr" which calculates load for an *external* resistor. The thermal sensor on the internal ceramic element has tripped. Causes
1. Heavy Duty Cycle: The application (e.g., a fast conveyor) is stopping too frequently, overwhelming the small internal resistor.
2. Dirt Buildup: The heatsink and resistor cavity are clogged with dust, preventing airflow.
3. Fan Failure: The main cooling fan is dead, so the resistor cannot shed heat.
4. High Voltage: High input line voltage causing the DC bus to sit near the braking threshold constantly. Solution Check the cooling fans. Clean the heatsink with compressed air.
If the application requires frequent braking, the internal resistor is likely undersized. You should install a larger *external* braking resistor. To do this, you must disconnect the internal jumper (usually between PA and PB or similar) and wire the external bank. Then, change the parameter for "Braking Resistor Selection" to "External." This tells the drive to ignore the internal E-16 sensor and rely on the new external capacity.
Description Many smaller Toshiba drives (under 20HP) come with a built-in Dynamic Braking Resistor tucked inside the heatsink. E-16 indicates that this *internal* resistor is overheating. This is distinct from "OLr" which calculates load for an *external* resistor. The thermal sensor on the internal ceramic element has tripped. Causes
1. Heavy Duty Cycle: The application (e.g., a fast conveyor) is stopping too frequently, overwhelming the small internal resistor.
2. Dirt Buildup: The heatsink and resistor cavity are clogged with dust, preventing airflow.
3. Fan Failure: The main cooling fan is dead, so the resistor cannot shed heat.
4. High Voltage: High input line voltage causing the DC bus to sit near the braking threshold constantly. Solution Check the cooling fans. Clean the heatsink with compressed air.
If the application requires frequent braking, the internal resistor is likely undersized. You should install a larger *external* braking resistor. To do this, you must disconnect the internal jumper (usually between PA and PB or similar) and wire the external bank. Then, change the parameter for "Braking Resistor Selection" to "External." This tells the drive to ignore the internal E-16 sensor and rely on the new external capacity.
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