If the dynamic brake warning indicator illuminates while using the dynamic brakes, what should you do?

If the dynamic brake warning indicator illuminates while using the dynamic brakes, what should you do?

• A. Switch to manual braking only
• B. Ignore the light if it is momentary
• C. Increase dynamic braking to clear the warning
• D. Reduce dynamic brakes until the light goes out

Answer: (D)

Dynamic braking slows the vehicle by using the motors as generators and dumping energy in resistors. The warning light appears to protect the system when it overheats or detects a fault. The best action is to reduce dynamic braking until the light goes out, because easing off lowers current, lets the components cool, and helps the fault clear. Increasing dynamic braking would worsen overheating and potentially cause damage. Ignoring the light isn’t safe, and if the light remains after backing off, you should stop and inspect or follow proper procedures.

Dynamic braking slows the vehicle by using the motors as generators and dumping energy in resistors. The warning light appears to protect the system when it overheats or detects a fault. The best action is to reduce dynamic braking until the light goes out, because easing off lowers current, lets the components cool, and helps the fault clear. Increasing dynamic braking would worsen overheating and potentially cause damage. Ignoring the light isn’t safe, and if the light remains after backing off, you should stop and inspect or follow proper procedures.