UPS Preventive Maintenance (PM) Service
PM Service Includes: “Major PM’s Only”
- Perform a complete visual inspection of the equipment including subassemblies, wiring harnesses, contacts, cables, and major components. Clean as needed.
- Verify adequate room ventilation and temperature.
- Verify and record all electronics to system specifications.
- Inspect the inverter and rectifier / converter, battery charger, and power input circuitry and all subassemblies.
- Check all connections for proper torque and/or discoloration.
- Check fuses on the DC capacitors (if applicable).
- Check air filters for cleanliness, replace as needed.
- Check fans for proper operation.
- Check module(s) completely for the following (if applicable)
- Rectifier inverter static switch for abnormalities.
- Power capacitors for swelling or leakage.
- DC capacitors vent caps.
- Measure and record phase-to-phase input voltages and currents.
- Measure temperature on all breakers, connections and associated controls. Record all high temperature areas.
- Measure and record all voltage and current meter readings on the module control cabinet or the system control cabinet input and output phase A, B, & C.
- Measure and record harmonic trap filter currents
- Perform Infrared on UPS load panels. Record any abnormalities.
- With customer approval, perform operational test of the system including unit transfer and battery discharge.
Battery Inspection Service Performed: “Major and Minor PM’s”
- Perform a complete visual inspection of the equipment including subassemblies, wiring harnesses, contacts, cables, and major components of UPS. Verify Proper Working Order of systems. Clean as needed.
- Check integrity of battery cabinet (if applicable).
- Visual inspection of the battery cabinet and/or room to include.
- Check for NO-OX grease or acceptable compound on all connections (if applicable).
- Check battery jars for proper electrolyte level (if flooded cells).
- Check for corrosion on all terminals and cables, remove and neutralize as needed.
- Check the overall cleanliness of the battery room and jars.
- Measure and record AC bus ripple voltage and current.
- Measure and record total battery float voltage and current.
- Inspect site environmentals per IEEE / ANSI 450-1987 standards.
- Verify that all required safety devices are present and operational.
- Load test batteries.
- Check batteries for internal impedance.
- Re-torque battery terminals as required.
Report:
- Provide a complete service report with all checklist items and all measurements and data recordings as listed above.
- Provide a summary report of system performance and recommended repairs (quotation for repairs provided separately). Review with customer to address any questions and schedule repairs.