PA7300 Instruction Manual - TECO-Westinghouse Motor Company

6. MAINTENANCE6.1 PERIODIC INSPECTIONThe 7300PA requires very few routine checks. It will function longer if it is keptclean, cool and dry. Observe precautions listed in "Location". Check for tightnessof electrical connections, discoloration or other signs of overheating. Use Table 4 asyour inspection guide. Before servicing, turn OFF AC main circuit power and be surethat CHARGE lamp is OFF.Table 4 Periodic InspectionComponent Check Corrective ActionExternal terminals, unit Loose screwsTightenmounting bolts,connectors, etc. Loose connectors TightenCooling finsPrinted circuit boardCooling fanPower elementsSmoothing capacitorBuild-up of dust and dirtAccumulation of conductive dust or oilAbnormal noise and vibration. Whetherthe cumulative operation time exceeds20,000 hours or not.Accumulation of dust and dirtDiscoloration or odorNote: Operating conditions as follows:Ambient temperature: Yearly average 30, 86Load factor: 80% or lessOperating time: 12 hours or less per dayStandard Parts ReplacementBlow with dry compressed air of39.2 ×10 4 to 58.8 x 10 4 Pa (57 to85psi.) pressure.Blow with dry compressed air of39.2 x10 4 to 58.8 x 10 4 Pa (57 to85psi.) pressure.If dust and oil cannot be removed,replace the board.Replace the cooling fan.Blow with dry compressed air of39.2 x10 4 to 58.8 x 10 4 Pa (57 to85psi) pressure.Replace the capacitor or inverterunit.Item Name Replacement Cycle RemarksCooling fan 2 or 3 years Replace with a new product.Smoothing capacitor5 yearsReplace with a new product. (Determineafter examination).Circuit Breakers and relays Determine after examination.Fuse 10 years Replace with a new product.Aluminum capacitor on PC board5 yearsNote: Operating conditions as follows:Ambient temperature: Yearly average 30, 86Load factor: 80% or lessOperating time: 20 hours or less per dayReplace with a new product. (Determineafter examination).19