TECO-Westinghouse PA7300 Series, Installation And Operation Manual

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6. MAINTENANCE
6.1 PERIODIC INSPECTION
The PA7300 requires very few routine checks. It will function longer if it is kept clean, cool, and dry.
Observe precautions listed in “Location”, Section 3.2. Check for tightness of electrical connections,
discoloration, or other signs of overheating. Use Table 4 as your inspection guide. Before servicing,
turn OFF the AC main circuit power and make sure that the “CHARGE” lamp is OFF.
Table 4 Periodic Inspection
Component Check Corrective Act ion
External terminals, Loose screws Tighten
unit mounting bolts,
connectors, etc.
Loose connectors Tighten
Cooling fins Blow with dry compressed
Build-up of dust and dirt air of 39.2 ×10 4 to 58.8 x 10 4
Pa (57 to 85psi.) pressure.
Printed circuit board Blow with dry compressed air
of 39.2 x10
4
to 58.8 x 10
4
Pa
Accumulation of conductive dust or oil (57 to 85psi.) pressure. If dust
and or oil cannot be removed,
replace the board.
Cooling fan Excessive noise and vibration, whether
the cumulative operation time exceeds Replace the cooling fan.
20,000 hours or not.
Power elements Blow with dry compressed air
Accumulation of dust and dirt of 39.2 x10
4
to 58.8 x 10
4
Pa
(57 to 85psi) pressure.
Smoothing capacitor Discoloration or odor Replace the capacitor or
AC Drive unit.
Note: Operating conditions as follows:
•
Ambient temperature: Yearly average 30˚C , 86˚F
• Load factor: 80% or less
• Operating time: 12 hours or less per day
Standard Parts Replacement
Item Replacement Cycle Remarks
Cooling fan 2 or 3 years Replace with a new product.
Smoothing capacitor 5 years Replace with a new product.
(Determine after examination)
Circuit Breakers and relays ----- Determine after examination.
Fuse 10 years Replace with a new product.
Aluminum capacitor on PC 5 years Replace with a new product.
board (Determine after examination)
Note: Operating conditions as follows:
• Ambient temperature: Yearly average 30˚C, 86°F
• Load factor: 80% or less
• Operating time: 20 hours or less per day
6-1
PA 7300 PART I: INSTALLATION MANUAL