What visual indicator shows a malfunction in the CSE 102 detector during the battery-voltage test?

A yellow light serves as a crucial visual indicator of a malfunction in the CSE 102 detector during the battery-voltage test. This yellow light typically signals that there is a problem with the operational status of the detector, such as insufficient battery power or a fault in the testing system. By illuminating yellow, the device alerts the user to take necessary action, such as recharging or replacing the battery, in order to ensure that the detector operates effectively and safely. Understanding this indicator is essential for maintaining the integrity and readiness of safety equipment in mining operations.