Table 1 gives information about the recommended daily inspection for Yaskawa drives. Examine the items in Table 1 each day to make sure that the components do not become unserviceable or fail. Make a copy of this checklist and put a check mark in the “Checked” column after each inspection.

Table 1. Daily Inspection Checklist

Inspection Area

Inspection Points

Corrective Action

Checked

Motor

Examine for unusual oscillation or noise coming from the motor.

  • Check the load coupling.

  • Measure motor vibration.

  • Tighten all loose components.

  

Cooling System

Examine for unusual heat from the drive or motor and visible discoloration.

  • Check for a load that is too heavy.

  • Tighten loose screws.

  • Check for a dirty heatsink or motor.

  • Measure the ambient temperature.

  

Examine the cooling fans, circulation fans, and circuit board cooling fans.

  • Check for a clogged or dirty fan.

  • Use the performance life monitor to check for correct fan operation.

  

Surrounding Environment

Make sure that the installation environment is applicable.

Remove the source of contamination or correct unsatisfactory environment.

  

Load

Make sure that the drive output current is not more than the motor or drive rating for an extended period of time.

  • Check for a load that is too heavy.

  • Check the correct motor parameter settings.

  

Power Supply Voltage

Examine main power supply and control voltages.

  • Correct the voltage or power supply to agree with nameplate specifications.

  • Verify all main circuit phases.