What is a yellow light on a reefer unit?

A yellow light on a reefer unit typically indicates a caution or warning status, suggesting that there may be a minor issue that needs attention but is not critical. This could be related to temperature fluctuations, power supply issues, or maintenance reminders. It's important to check the unit's display or control panel for specific error codes or messages to diagnose the problem. Prompt attention is recommended to prevent escalation to a more serious issue.