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Chapter XI
MAINTENANCE AND
INSPECTION
For continued safe operation and prolonged inverter life conduct the
following daily and periodic inspection:
r\oo"o
5C
CAUTION
~
Before inspection, always turn off the distribution
circuit~breaker
(MeCB)
and wait at least 3 minutes to confirm that the "CHARGE" lamp is not lit
and there is no voltage present on the main circuit DC capacitor
(between
+
and - terminals).
11
~1
Daily Inspection
1)
Noise ... Check for unusual noise of the transformer, reactor, motor,
etc.
2)
Temperature and smell ... Check for abnormal heating or any burning
smell around the insulators.
3)
Note if there are any abnormal fluctuations of the frequency meter or
the motor speed.
4)
Note and keep records on the power source voltage, output voltage,
output current and output frequency.
5)
Ensure the ambient temperature is within the -1 QGC -40°C range.
6)
Ensure the humidity at less tha 90% (relative), and there is no
condensation.
7)
Keep the environment free from dust and corrosive gases.
8)
Note if there are any abnormal vibrations present at the inverter,
motor, etc.
11·2
Periodic Inspection
1)
Are there any loose terminals?
2)
Are there any damaged cables?
3)
Are any vent holes clogged with debris or dust?
4)
Is the cooling fan operating?
5)
Are the PCBs free from accumulated dust?
6)
Check and clean out any dust or debris inside the inverter.
7)
When the unit is unused for more than 6 months, power up the unit
on a
semi~annual
basis and confirm normal functioning.
11·3
Guidance
for
Parts Replacement
Pertormance and service life of the control equipment, timely repairs are
required on worn components. The following table specifies the expected
service life of the major parts used for this inverter.
11-1
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