Delta VFD-ED Series User Manual

Chapter 15 Maintenance and TroubleshootingVFD-ED
15-3
15-1 Maintenance and Inspections
For regular maintenance, first stop operation, then turn off the power, and then take off the outer cover.
Even after turning off the power supply, charging voltages remaining in the filter capacitor require some
time to discharge. To avoid danger, operation must not start until the charging indicator goes off, and you
confirm the voltage with a voltmeter to be below the safety value (≤ 25 V
DC
).
Ambient environment
Items to Check Methods and Criterion
Maintenance Period
Daily Half Year One Year
Check the ambient temperature, humidity,
and vibration and check for any dust, gas,
oil or water drops.
Visual inspection and
measurement with equipment
with standard specification

Check for any dangerous objects Visual inspection

Voltage
Items to Check Methods and Criterion
Maintenance Period
Daily Half Year One Year
Check that the voltage of main circuit and
control circuit are correct.
Measure with multimeter with
standard specifications.

Digital keypad display
Items to Check Methods and Criterion
Maintenance Period
Daily Half Year One Year
Check that the display is clear for reading Visual inspection

Check for any missing characters Visual inspection

Mechanical parts
Items to Check Methods and Criterion
Maintenance Period
Daily Half Year One Year
Check for any abnormal sound or vibration Visual and audible inspection

Check for any loose bolts Securely tighten

Check for any deformed or damaged parts Visual inspection

Check for any color change caused by
overheating
Visual inspection

Check for any dust or dirt Visual inspection


Delta VFD-ED Series Specifications

General

Brand	Delta
Model	VFD-ED Series
Category	DC Drives
Language	English