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4-1 Maintenance
SYSDRIVE 3G3IV requires very few routine checks. It will function longer if it
is kept clean, cool and dry, while observing the precautions listed in “Loca-
tion”. Check for tightness of electrical connections, discoloration or other
signs of overheating. Use the table below as the inspection guide. Before
servicing, turn off AC main circuit power and be sure that CHARGE lamp is
off.
Periodical Inspection
Component Check Corrective Action
External terminals, unit mounting
Loosened screws Tighten
bolts, connectors, etc.
Loosened connectors Tighten
Cooling fins Build-up of dust and dirt Blow with a dry compressed air of 4 to
6kg-cm
2
(57to85Ibs.in
2
) pressure.
Printed circuit board Accumulation of conductive dust or oil
mist.
Clean the board. 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 a dry compressed air of 4 to
6kg-cm
2
(57to85Ibs.in
2
) pressure.
Smoothing capacitor Discoloration or odor Replace the capacitor or inverter unit.
Note
Operating conditions as follows:
• Ambient temperature: 30°C(86°F)/yearly mean
• Load factor: 80% or below
• Operation rate: 12 hours or below/day
Section 4-1
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