YASKAWA CIMR-DC4A0040AAA Technical Manual page 127

Periodic Inspection
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DANGER! Electrical Shock Hazard. Do not inspect, connect, or disconnect any wiring while the power is on. Failure to comply can
result in serious personal injury. Before servicing, 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 for at least the time specified on the warning label; after all indicators are OFF, measure for unsafe voltages to
confirm the converter is safe prior to servicing.
NOTICE: Check the operation of the cooling fan only during inspections.
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
damage, or heat stress.
and 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 leaking, discoloration, or cracks.
Electrolytic
• Check if the cap has come off, for any swelling, or if
Capacitor
the sides have burst open.
Diode, IGBT
Inspect for dust or other foreign material collected on
(Power
the surface.
Transistor)
• Inspect terminals for stripped, damaged, or loose
connections.
General
• Make sure all terminals have been properly
tightened.
Check for any odor, discoloration, and rust. Make sure
Circuit Boards connections are properly fastened and that no dust or
oil mist has accumulated on the surface of the board.
Cooling Fan,
• Check for abnormal oscillation or unusual noise.
Circulation Fan,
Control Board
• Check for damaged or missing fan blades.
Cooling Fan
Inspect for dust or other foreign material collected on
Heatsink
the surface.
• Make sure data appears on the display properly.
Digital Operator
• Inspect for dust or other foreign material that may
have collected on surrounding components.
YASKAWA ELECTRIC SIEP C710656 06F YASKAWA Power Regenerative Converter - D1000 Technical Manual
Table 6.2 Periodic Inspection Checklist
Inspection Points
Main Circuit Periodic Inspection
Control Circuit Periodic Inspection
Cooling System Periodic Inspection
Display Periodic Inspection
Corrective Action
• Replace damaged components as required.
• The converter has few serviceable parts and may
require complete converter replacement.
• Inspect enclosure door seal if used.
• Use a vacuum cleaner to remove dust and dirt, but do
not allow it to come into contact with product
components.
• Replace components if cleaning is not possible.
Repair or replace damaged wiring.
Tighten loose screws and replace damaged screws or
terminals.
• Check coil voltage for overvoltage or undervoltage
conditions.
• Replace damaged removable relays, contactors, or
circuit board.
The converter has few serviceable parts and may require
complete converter replacement.
Use a vacuum cleaner to remove dust and dirt, but do not
allow it to come into contact with product components.
• Tighten loose screws and replace damaged screws or
terminals.
• If terminals are integral to a circuit board, then board or
converter replacement may be required.
• Fix any loose connections.
• If an antistatic cloth or vacuum plunger cannot be used,
replace the board.
• Use a vacuum cleaner to remove dust and dirt, but do
not allow it to come into contact with product
components.
• Do not use any solvents to clean the board.
• The converter has few serviceable parts and may
require complete converter replacement.
• Replace as required.
• Cooling Fans on page 130 for information on cleaning
or replacing the fan.
Use a vacuum cleaner to remove dust and dirt, but do not
allow it to come into contact with product components.
• Contact the nearest sales office if there is any trouble
with the display or keypad.
• Clean the digital operator.
6.2 Inspection
Checked
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