Recommended Periodic Inspection - YASKAWA J1000 Technical Manual

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Recommended Periodic Inspection

Table 7.2 outlines the recommended periodic inspections for Yaskawa drive installations. Periodic inspections should generally
be checked every 3-6 months; however, the drive may require more frequent inspection due to poor environments or rigorous
use. Operating and environmental conditions, along with experience in each application, will determine the actual inspection
frequency for each installation. Periodic inspection will help to avoid premature deterioration in performance or product failure.
Copy this checklist and mark the "Checked" column after each inspection.
n Periodic Inspection
WARNING! Electrical Shock Hazard. Do not connect or disconnect wiring while the power is on. Failure to comply can result in serious
personal injury. Before servicing the drive, disconnect all power to the equipment. The internal capacitor remains charged even after the
power supply is turned off. The charge indicator LED will extinguish when the DC bus voltage is below 50 Vdc. To prevent electric shock,
wait at least one minute after all indicators are OFF and measure the DC bus voltage level to confirm safe level.
Inspection Area
• Inspect equipment for discoloration from overheating
or deterioration.
• Inspect for damaged or deformed parts.
General
• Inspect for dirt, foreign particles, or dust collection
on components.
• Inspect wiring and connections for discoloration,
Conductors and
damage, or heat stress.
Wiring
• Inspect wire insulation and shielding for wear.
• Inspect terminals for stripped, damaged, or loose
Terminals
connections.
• Inspect contactors and relays for excessive noise
during operation.
Relays and
Contactors
• Inspect coils for signs of overheating such as melted
or cracked insulation.
• Inspect for discoloration of heat stress on or around
Braking Resistors
resistors.
• Inspect terminals for stripped, damaged or loose
connections.
General
• Check for tightness.
• Make sure the LED lights correctly.
LEDs
• Inspect for dust or other foreign material that may
have collected on surrounding components.
• Check for abnormal oscillation or unusual noise.
Cooling Fan
• Check for damaged or missing fan blades.
• Inspect for dust or other foreign material collected on
Heatsink
the surface.
• Inspect air intake and exhaust openings. They must
Air Duct
be free from obstruction and properly installed.
Operation Check • Check for increased vibration or abnormal noise.
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 31B YASKAWA AC Drive – J1000 Technical Manual
Table 7.2 Periodic Inspection Checklist
Inspection Points
Main Circuit Periodic Inspection
Control Circuit Periodic Inspection
LED Periodic Inspection
Cooling System Periodic Inspection
Motor Periodic Inspection
http://nicontrols.com
Corrective Action
• Replace damaged components as required.
• The drive has few serviceable parts and may
require complete drive replacement.
• Inspect enclosure door seal if present. Replace
components if cleaning is not possible.
• Use dry air to clear away foreign matter. Use a
pressure of:
4 4
39.2 x 10 to 58.8 x 10 Pa (4 - 6 kg •cm
• Repair or replace damaged wiring.
• Tighten loose screws and replace damaged screws
or terminals.
• 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.
• 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.
• Contact your Yaskawa representative if there is
any trouble with the LED or keypad.
• Clean the LED.
• Replace as required.
• Refer to Drive Cooling Fans on page 160
information on 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
2
6 kg•cm ).
• Visually inspect the area.
• Clear obstructions and clean air duct as required.
• Stop the motor and contact qualified maintenance
personnel as required.
7.2 Inspection
Checked
2
).
7
for
4 Pa (4 -
157