Semi-Annual Service ● Perform a complete visual inspection of all internal sub-assemblies, wiring harnesses, contactors, cables, and major components ● Check for proper clearance around the unit ● Perform temperature checks on all breakers, connections, and associated controls. Report all high temperature areas ● Check air filters for cleanliness; clean or replace ● Check module(s) for the following, as applicable: o Rectifier and inverter snubber circuit board discoloration o Power capacitors for swelling or leakage o Capacitor vent caps extruded more than 1/8” o Fans for proper operation o Lubricate and check bearings for abnormal condition, as applicable, where possible ● Record all meter readings and calibrate as necessary, where possible ● Measure and record phase-to-phase input, output, bypass and battery voltages and currents, where possible ● Review alarm log/history for any irregular activity, where possible ● Verify remote status panel operation, as applicable ● Measure and record harmonic trap filter currents, where possible ● Review system performance with customer to address any questions and to schedule any repairs ● Implement manufacturer field change notices, as possible ● Perform functional system test upon customer approval ● Provide inspection report, with recommendations, to Customer within 7 to 10 business days Annual Service – consists of all steps included with Semi-Annual Service, plus: ● Check the inverter and rectifier snubbers for discoloration or damaged wiring ● Check all contacts to ensure secure connections ● Verify all connections show no signs of discoloration ● Check fuses on the DC capacitor deck for continuity, as applicable ● Clean interior and exterior of unit ● With customer approval, perform operational test of the system including unit transfer and battery discharge ● Measure and calibrate, as necessary, where possible, all electronics to system specifications ● Measure and record all low-voltage power supply levels NOTE 1: Preventative Maintenance may require placing the Critical Load onto Maintenance Bypass to ensure electrical integrity. NOTE 2: Air filters are covered by the terms of the full-service contract. NOTE 3: Preventative Maintenance on System Control Cabinet, Power Tie, Breaker Cabinets, Load Bus Sync, or Maintenance Bypass Cabinets, if included on the Schedule of Equipment, utilizes a separate scope of work. NOTE 4: Some checks are not applicable to all UPS brands / models.
