Maintenance And Inspection; Outline Of Free Warranty; Daily Inspection; Periodic Inspection - YASKAWA Varispeed F7 Instruction Manual

Maintenance and Inspection

Outline of Free Warranty

The free warranty period of the Inverter is as follows:
Free warranty Period: This product is warranted for twelve months after being delivered to Yaskawa's cus-
tomer or if applicable eighteen months from the date of shipment from Yaskawa's factory whichever comes
first.

Daily Inspection

Check the following items with the system in operation.
The motor should not be vibrating or making unusual noises.
•
There should be no abnormal heat generation.
•
The ambient temperature should not be too high.
•
The output current value shown on the monitor displays should not be higher than normal.
•
The cooling fan on the bottom of the Inverter should be operating normally.
•

Periodic Inspection

Check the following items during periodic maintenance.
Always turn OFF the power supply before beginning inspection. Turn OFF the main circuit power supply,
wait for the time indicated on the front cover, and make sure the CHARGE indicator light has gone out, and
then perform maintenance and inspection. Be sure not to touch terminals right after the power has been turned
off. Doing so can result in electric shock.
External terminals,
mounting bolts, connec-
tors, etc.
Heatsinks
PCBs
Cooling fan
Power elements
Smoothing capacitor
-2
8
Item
Are all screws and bolts tight?
Are connectors tight?
Are the fins dirty or dusty?
Is there any conductive dirt or oil mist on
the PCBs?
Is there any abnormal noise or vibration or
has the total operating time exceeded
20,000 hours?
Is there any conductive dirt or oil mist on
the elements?
Are there any irregularities, such as dis-
coloration or odor?
Table 8.1 Periodic Inspections
Inspection
Tighten loose screws and bolts firmly.
Reconnect the loose connectors.
Clean off any dirt and dust with an air gun using
dry air at a pressure of 39.2 x 10
(4 to 6 kg•cm
Clean off any dirt and dust with an air gun using
dry air at a pressure of 39.2 x 10
(4 to 6 kg•cm
Replace the boards if they cannot be made clean.
Replace the cooling fan.
Clean off any dirt and dust with an air gun using
dry air at a pressure of 39.2 x 10
(4 to 6 kg•cm
Replace the capacitor or Inverter.
Corrective Procedure
4
to 58.8 x 10
2
).
4
to 58.8 x 10
2
).
4
to 58.8 x 10
2
).
4
Pa
4
Pa
4
Pa