YASKAWA V1000 Series Technical Manual page 259

Inspection Area
• Inspect contactors and relays for excessive noise during operation.
Relays and Contactors
• Inspect coils for signs of overheating such as melted or cracked
insulation.
Braking Resistors • Inspect for discoloration of heat stress on or around resistors.
• Inspect for leakage, discoloration, or cracks.
Electrolytic (bus) Capacitors
• Inspect the relief valve for swelling, rupture, or leakage.
• Inspect for accumulation of dust or other foreign particles on
Diodes and IGBTs
components.
Operation Check • Check for increased vibration or abnormal noise.
• Inspect terminals for stripped, damaged or loose connections.
General
• Check for tightness.
• Inspect for unusual discoloration, burning or strange odor, noticeable
Printed Circuit Boards rust or corrosion, proper seating of connectors, dust, oil, or other
contamination.
• Check for abnormal oscillation or unusual noise.
Cooling Fan
• Check for damaged or missing fan blades.
Heatsink • Inspect for dust or other foreign material collected on the surface.
• Inspect air intake and exhaust openings. They must be free from
Air Duct
obstruction and properly installed.
• Make sure the LED lights correctly.
• Make sure various components operate properly.
LEDs
• Inspect for dust or other foreign material that may have collected on
surrounding components.
Note: Periodic inspections should be performed every one or two years. The drive, however, may require more frequent inspection due to poor environments or rigorous use.
YASKAWA ELECTRIC SIEP C710606 18A YASKAWA AC Drive – V1000 Technical Manual (Preliminary)
Inspection Points
Motor Periodic Inspection
Control Circuit Periodic Inspection
Cooling System Periodic Inspection
LED Periodic Inspection
Corrective Action
• Check coil voltage for over or under voltage conditions.
• Replace damaged removable relays contactors or circuit board.
• Minor discoloration may be acceptable.
• If discoloration exists check for loose connections.
• The drive has few serviceable parts and may require complete
drive replacement.
• Use dry air to clear away foreign matter.
• Use a pressure of: 39.2 x 10
4 to 58.8 x 10
• Stop the motor and contact qualified maintenance personnel as
required.
• Tighten loose screws and replace damaged screws or terminals.
• If terminals are integral to a circuit board then board or drive
replacement may be required.
• Re-seat loose connectors.
• Replace PCBs if wiping or vacuuming with anti-static vacuum
cannot clean the PCB.
• Do not use solvents on PCBs.
• Use dry air to clear away foreign matter. Use a pressure of 39.2
x 10 4 to 58.8 x 10 4 Pa (4 - 6 kg •cm 2 ).
• The drive has few serviceable parts and may require complete
drive replacement.
• Replace as required.
• Refer to Drive Cooling Fans on page 261
cleaning or replacing the cooling fan.
• Use dry air to clear away foreign matter.
• Use a pressure of 39.2 x 10
4 to 58.8 x 10
• Visually inspect the area.
• Clear obstructions and clean air duct as required.
• Contact your Yaskawa representative if there is any trouble with
the LED or keypad.
• Clean the LED.
7.2 Inspection
Checked
4 Pa (4 - 6 kg •cm 2 ).
for information on
4 Pa (4 - 6 kg•cm 2 ).
7
259