Before starting a new system, the technician should?

Performing both a mechanical and electrical pre-check prior to starting a new system is essential to ensure everything is functioning optimally and safely. This step allows the technician to identify any potential issues that may not be immediately visible, such as improperly connected wiring, mechanical obstructions, or other defects that could lead to operational failure.

A mechanical pre-check typically involves reviewing components like belts, pulleys, and fluid levels, ensuring they are properly installed and in good condition. An electrical pre-check involves examining electrical connections, circuit integrity, and ensuring that safety features are operational. By conducting these checks, the technician can prevent costly repairs or accidents that could arise from overlooking critical components.

The other options do not provide a comprehensive approach to system readiness. Skipping pre-checks based solely on the appearance of newness could lead to oversights of serious issues. Visual inspections alone are insufficient, as they do not cover the full spectrum of potential mechanical and electrical problems. Only testing the system after allowing it to run for several hours would miss the opportunity to catch and address any starting issues that could arise right from initiation.