In order to maintain fire alarms, a business or organization should partner with a fire alarm maintenance company that is registered with their State Fire Marshall to conduct fire alarm inspection and maintenance. Fire alarm maintenance should not be done by in-house maintenance personnel, as performing fire alarm maintenance requires certification, registration and ongoing technical training. (Some states make exceptions for some state agencies).
A licensed, registered fire alarm maintenance company will conduct through, regular inspections of your fire alarm system that include visual inspection, testing, cleaning, and repair of the system including the control panel, sensors, notification devices, and backup batteries. They will provide required documentation for your state in accordance with NFPA (National Fire Protection Association) guidelines.