Hitachi SJ7002 Series Instruction Manual page 265

6–18
Maintenance and Inspection
Item Inspected
Motor
Clearwater Tech - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.clrwtr.com - Email: info@clrwtr.com
Check for...
General Vibration
Unusual odor
Insulation Isolation
resistance boundary
fault
Note 1: The life of a capacitor is affected by the ambient temperature. See
Curve" on page
Note 2: The inverter must be cleaned periodically. If dust accumulates on the fan and heat
sink, it can cause overheating of the inverter.
Inspection
Cycle
Inspection Method
Month Year
✔
Visual, touch
✔
Look for signs of
overheating
✔
Disconnect motor
from inverter, do
megger test on
motor
6–20.
Criteria
Ordinary range
Normal appearance
500V class megger test
must pass
"Capacitor Life