BLDG A: This fire panel shows F1-5 troubles and low battery. These troubles are zone troubles. The panel circuit board has clear signs of corrosion and these circuits are reading clear so they should not be in trouble. This FACP will need Replaced, the fire panel is a MS-5024UD. The customer would like us to use as much of the existing devices such as mini horns and pull stations if compatible with new FACP. BLDG D: Low battery on AES radio, replaced (1) 12v8ah Battery. BLDG-F: No signal issues at this time suspect radio lost communications and has now restored itself.