Periodic Inspection; Periodic Inspection Checklist - YASKAWA V1000 Series Installation & Start-Up Manual

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Recommended Periodic Inspection
Table 6.2 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.

Periodic Inspection

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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 five minutes after all indicators are OFF and measure the DC bus voltage level to confirm safe level.
Inspection
Area
• Overall check of the main power circuit
and ground terminals
• 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
Conductors and discoloration, damage, or heat stress.
Wiring • Inspect wire insulation and shielding for
wear.
• Inspect terminals for stripped, damaged,
Terminals
or loose connections.
• Inspect contactors and relays for
Relays and excessive noise during operation.
Contactors • Inspect coils for signs of overheating
such as melted or cracked insulation.
YASKAWA ELECTRIC TOEP C710606 09B YASKAWA AC Drive V1000 Installation & Start-Up Manual
Table 6.2 Periodic Inspection Checklist
Inspection Points
Main Circuit Periodic Inspection
Corrective Action
Take appropriate actions
(e.g., tightening loose connections).
• 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
39.2 x 10 4 to 58.8 x 10 4 Pa
(4 - 6 kg •cm 2 ).
• 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.
6.2 Inspection
Checked
249
6