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4-1
Maintenance
Periodical Inspection
Component
External terminals, unit mounting
bolts, connectors, etc.
b lt
t
t
Cooling fins
Printed circuit board
Cooling fan
Power elements
Smoothing capacitor
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.
Check
g
Loosened screws
Loosened connectors
Build-up of dust and dirt
Accumulation of conductive dust or oil
mist.
For abnormal noise and vibration.
Whether the cumulative operation
time exceeds 20,000 hours or not.
Accumulation of dust and dirt
Discoloration or odor
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
Corrective Action
Tighten
Tighten
Blow with a dry compressed air of 4 to
2
2
6kg-cm
(57 to 85 Ibs. in
) pressure.
Clean the board. If dust and oil cannot
be removed, replace the board.
Replace the cooling fan.
Blow with a dry compressed air of 4 to
2
2
6kg-cm
(57 to 85 Ibs. in
) pressure.
Replace the capacitor or inverter unit.
Section 4-1
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