UPS Full Preventive Maintenance Service – Performed SEMI- ANNUALLY All PM’s shall be completed after normal business hours to allow for equipment to be de-energized. Perform temperature check on all breakers, connections, and associated controls. Repair, and/or report all high temperature areas. Perform a complete visual inspection of the interior and exterior of equipment for any damaged or broken components, including subassemblies, wiring harnesses, contacts, cables, and major components. All costs and expenses for trucks, vehicles, tools, and equipment associated with trade Check air filters for cleanliness. (if applicable) Check rectifier and inverter snubber boards for discoloration. Record all voltage and current meter readings on the module control cabinet or the system control cabinet. Measure and record the DC float voltage at the UPS and at the battery. Measure and record the ripple voltage and current. All PM’s shall be completed after normal business hours to allow for equipment to be de-energized. Verify equipment is properly grounded and that the phase, neutral and ground wiring is in accordance with the Installation manual. UPS Full Preventive Maintenance Services – Performed ANNUALLY All PM’s shall be completed after normal business hours to allow for equipment to be de-energized. Perform all services listed under the semi-annual UPC Full Preventive Maintenance Service outlined in Section 1.2.2. plus: Check for proper clearance around the unit Clean interior of equipment for dirt and debris. Inspect all circuit breaker(s), terminal blocks, and ground/neutral bus bar connections for tightness. Inspect junction box terminals for tightness (if applicable). Conduct a thermal scan of interior components, assemblies, and connectors for evidence of overheating and/or burnt components. Inspect all option assemblies, associated cabling/wiring, and connectors for tightness (if applicable). Verify all installed options are operating properly (if applicable). Verify continuity of all fuses (if applicable). Measure voltage and current at each panelboard main input breaker (phases, neutral and ground) Verify all monitoring options (if applicable) are displaying values within preset parameters. Check or perform Engineering Field Change Notices (FCN) as necessary, if able and applicable. Check power capacitors for swelling or leaking oil (if applicable). Check for DC capacitor vent caps that have extruded more than 1/8" (if applicable). Measure and record harmonic trap filter currents (if applicable). Check the inverter and rectifier snubbers for burned or broken wires. Check all nuts, bolts, screws, and connectors for tightness and heat discoloration Check fuses on the DC capacitor deck for continuity (if applicable). With customer approval, perform 100% operational test of the system, including unit transfer and battery discharge. Calibrate and record all electronics to system specifications. Measure and record all low-voltage power supply levels. Record phase-to-phase input voltage and currents. Record real and apparent power for each phase Review system performance with customer to address any questions and to schedule any repairs.
