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5. A single thirty-second tone will sound when power to the system is interrupted. The unit will reset automatically when power is restored. A three-second tone will sound every time the pump starts. Troubleshooting Chart Maintenance Always disconnect the electrical supply before attempting to install, service, relocate or perform any maintenance. If the power source is out of sight, lock and tag in the open (off) position to prevent unexpected power application. Failure to do so could result in