6.2 Inspection
YASKAWA ELECTRIC
TOEP C710656 10B YASKAWA Power Regenerative Unit - R1000 Instruction Manual
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Pe
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Periodic Inspection
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 regenerative unit is safe prior to servicing.
NOTICE:
Check the operation of the cooling fan only during inspections.
Table 6.2 Periodic Inspection Checklist
Inspection Area
Inspection Points
Corrective Action
Checked
Main Circuit Periodic Inspection
General
• Inspect equipment for discoloration from
overheating or deterioration.
• Inspect for damaged or deformed parts.
• Replace damaged components as required.
• The regenerative unit has few serviceable parts and
may require complete regenerative unit replacement.
Inspect for dirt, foreign particles, or dust collection on
components.
• 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.
Conductors
and Wiring
• Inspect wiring and connections for discoloration,
damage, or heat stress.
• Inspect wire insulation and shielding for wear.
Repair or replace damaged wiring.
Terminals
Inspect terminals for stripped, damaged, or loose
connections.
Tighten loose screws and replace damaged screws or
terminals.
Relays and
Contactors
• Inspect contactors and relays for excessive noise
during operation.
• Inspect coils for signs of overheating such as melted
or cracked insulation.
• Check coil voltage for overvoltage or undervoltage
conditions.
• Replace damaged removable relays, contactors, or
circuit board.
Electrolytic
Capacitor
• Inspect for leaking, discoloration, or cracks.
• Check if the cap has come off, for any swelling, or if
the sides have burst open.
The regenerative unit has few serviceable parts and may
require complete regenerative unit replacement.
Diode, IGBT
(Power
Transistor)
Inspect for dust or other foreign material collected on
the surface.
Use a vacuum cleaner to remove dust and dirt, but do not
allow it to come into contact with product components.
Control Circuit Periodic Inspection
General
• Inspect terminals for stripped, damaged, or loose
connections.
• Make sure all terminals have been properly
tightened.
• Tighten loose screws and replace damaged screws or
terminals.
• If terminals are integral to a circuit board, then board or
regenerative unit replacement may be required.
Circuit Boards
Check for any odor, discoloration, and rust. Make sure
connections are properly fastened and that no dust or
oil mist has accumulated on the surface of the board.
• 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 regenerative unit has few serviceable parts and
may require complete regenerative unit replacement.
Cooling System Periodic Inspection
Cooling Fan,
Circulation Fan,
Control Board
Cooling Fan
• Check for abnormal oscillation or unusual noise.
• Check for damaged or missing fan blades.
• Replace as required.
•
for information on cleaning
or replacing the fan.
Heatsink
Inspect for dust or other foreign material collected on
the surface.
Use a vacuum cleaner to remove dust and dirt, but do not
allow it to come into contact with product components.
Display Periodic Inspection
Digital Operator
• Make sure data appears on the display properly.
• Inspect for dust or other foreign material that may
have collected on surrounding components.
• Contact the nearest sales office if there is any trouble
with the display or keypad.
• Clean the digital operator.
TOEP_C710656_10B_1_0.book 109 ページ ２０１５年１月８日 木曜日 午後８時５５分
