(a) Equipment failure. A provider must:(1) contact an individual by the end of the next working day after learning of an equipment failure; and(2) replace the equipment:(A) by the end of the next working day after learning of an equipment failure if the individual is available; or(B) by the end of the third working day after learning of an equipment failure if the individual is not available within one working day.(b) Low battery. A provider must visit an individual's home to check the equipment within five working days after the equipment has registered five or more "low battery" signals in a 72-hour period. The provider must replace a defective battery during the visit.(c) Documentation. A provider must document and maintain a record of each equipment failure and low battery signal. The documentation must include:(1) the date the provider became aware of the equipment failure or low battery signal;(2) the equipment or subscriber number;(3) a description of the problem; and(4) the date the equipment is repaired or replaced.