LSIS SV-iV5 Series, User Manual

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6. Inspection and Replacement
6-1
Chapter 6 – Inspection and replacement
LS Vector Inverter, STARVERT-iV5, is an industrial electronic product that adopts
up-to-date semiconductor device. It may have a failure caused by the ambient
environment such as temperature, humidity, vibration, etc. or an excessive use of
the component over its duration. It requires a routine checking to prevent such
failure in advance.
6.1 Precautions
CAUTION
Before starting the maintenance work, the operator must check out
the power input of the inverter.
Large-capacity electrolytic condenser in the power electronic circuit
remains charged with power even after the power is off. So be sure
to start the maintenance work after you acknowledged the power
has been completely discharged using a proper tester.
Be sure to use a rectifier type volt meter to obtain an accurate
voltage when directly measuring the output voltage of inverter.
General volt meter or digital volt meter may result in spurious
operation or indicate wrong value due to high frequency PWM
output voltage of the inverter.
6.2 Checking Points
Electronic product is not intended for a permanent use. When it exceeds the
duration even under the normal service environment, the product may have
trouble in its operation due to change in the nature of the parts. To prevent such
circumstance, it requires a routine and regular checking.
Especially if you use it under the following environment, have it checked with a
shorter interval than the regular checking.
When the temperature is relatively high in the installed place
When the product is operated with a frequent start and stop
When the input AC power and load vary seriously
When it has severe vibration or shock
When there is corrosive gas, combustible gas, oil sludge, dust, salts, metal
powder, etc