5.4
PERIODIC MAINTENANCE OF PARTS
The power regenerative unit is configured of many parts, and these parts must be op-
erating properly in order to make full use of the Inverter functions.
Among the electronic components, there are some that require maintenance depend-
ing on their usage conditions. In order to keep the power regenerative unit operating
normally over a long period of time, it is necessary to perform period inspections and
replace parts according to their service life.
When replacing parts, be careful not to drop any, such as screws, inside the
VS-656RC5. Failure to observe this caution may result in a short-circuit and a fire.
Periodic inspection standards vary depending the installation environment and usage
conditions of the power regenerative unit. The power regenerative unit’s mainte-
nance periods are noted below. Keep them as reference.
Table
14
Part Replacement Guidelines
Part
Standard Replacement Period
Replacement Method
Smoothing capacitor
5 years
Replace with new part. (Determine need by in-
spection.)
Braker relays
Determine need by inspection.
Fuses
10 years
Replace with new part.
Aluminum capacitors on PCBs
5 years
Replace with new board. (Determine need by in-
spection.)
Note Usage conditions are as follows:
S
Ambient temperature : Yearly average of 30
_
C
S
Load factor
: 80 % max.
S
Operating rate
: 12 hours max. per day
5 MAINTENANCE AND INSPECTION
43