You press start button on the hydraulic power unit shown in the illustration, and the motor does not start. The first thing you should check is the ________. Illustration GS-0161

Correct Answer: Option A — controller circuit breaker

When a motor fails to start, the most fundamental step is verifying the power supply. Checking the controller circuit breaker ensures that the electrical protection device has not tripped due to a fault or overload, which is the most common cause of a complete loss of power to the starter.