66
6.1 PERIODIC INSPECTION
The VS-686SS5 will function longer if it is kept clean, cool and dry, while observing the precautions
listed in Par. 2.3. Check for tightness of electrical connections, discoloration or other signs of
overheating or aging. Use Table 29 as your inspection guide. Before servicing, turn OFF AC main
circuit power and be sure that the CHARGE LED is OFF.
Table 29 Periodic Inspection
Component Check Corrective Action
External Terminals,
Loose screws Tighten.
n
t
ount
ng
o
ts,
Connectors, etc.
Loose connectors Tighten.
Heatsink Build-up of dust and dirt
Blow with dry compressed air of 39.2¢10
4
to
58.8¢10
4
Pa (4 to 6kg¡cm
2
) pressure.
Printed Circuit Board Accumulation of conductive dust or oil.
Blow with dry compressed air of 39.2¢10
4
to
58.8¢10
4
Pa (4 to 6kg¡cm
2
) pressure. If dust and
oil cannot be removed, replace the board.
Cooling Fan
For abnormal noise and vibration.
Whether the cumulative operation time
exceeds 20,000 hours or not.
Replace the cooling fan.
Power Elements Accumulation of dust and dirt
Blow with dry compressed air of 39.2¢10
4
to
58.8¢10
4
Pa (4 to 6kg¡cm
2
) pressure.
Smoothing Capacitor Discoloration or odor Replace the capacitor or inverter unit.
6.2 PARTS REPLACEMENT SCHEDULE (GUIDELINES)
Replace the following parts periodically, for a long, safe, trouble free working life of VS-686SS5.
Table 30 Parts Replacement Schedule
Parts Interval (Approx.) Remarks
Cooling Fan
2 to 3 years Replace with new one.
Smoothing Capacitor
5 years
Replace with new one. (Decided after
inspection.)
Brea
ers or Re
ays
Dec
e
a
ter
nspect
on.
Fuse
10 years Replace with new one.
Aluminum Electrolytic
Capacitor on PC Board
5 years
Replace with new one. (Decided after
inspection.)
Operating conditions are as follows:
Ambient temperature : 30_ C yearly average
Load factor : 80% or below
Operation rate : 20 hours or below /day
NOTE
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