Woodward 2301A 9907 series electronic load distribution and speed controller

Unstable speed (fluctuation), high gain/low reset; Improper compensation of the actuator; If the sensor gap is too large, decrease the gain counterclockwise/increase it clockwise to reset; Fine tune the 'actuator compensation'; Adjust the sensor gap to 0.25-1.0mm

Speed signal fault sensor open/short circuit; Poor shielding; Gear wear measurement sensor resistance (100-300 Ω); Check the connection of the shielding layer; Replace the gear (radial runout ≤ 0.5mm)

2. Maintenance and safety precautions

Daily maintenance: Check the tightness of the wiring terminals and the gap between sensors every month; Clean the controller panel quarterly (use a dry soft cloth, do not use solvents or sharp tools).

Static electricity protection: Before touching the circuit board, static electricity must be released (touching grounded metal); Do not touch PCB components or pins with your hands. When replacing the PCB, use anti-static bags for packaging.

Repair restriction: Self opening repair is prohibited, please contact Woodward authorized service center; When returning for repair, it is necessary to label the model, serial number, and fault description, and use the original factory packaging.

Key safety warning

Overspeed risk: The prime mover must be equipped with an independent overspeed shutdown device (independent of the controller) to prevent equipment damage or personnel injury caused by uncontrolled speed.

High voltage hazard: CT open circuit can generate fatal high voltage. When wiring or maintenance, it is necessary to short-circuit the CT terminal or cut off the power first; The terminal voltage of the high-voltage controller should be ≥ 88VAC, and insulated gloves should be worn for operation.

Static damage: Electronic components are sensitive to static electricity, and anti-static packaging should be used during transportation and installation. Plastic and vinyl materials are prohibited from contacting PCBs.

Emergency shutdown: Emergency shutdown measures should be prepared during startup. If abnormal actuator action or speed limit is found, the power supply should be immediately cut off.