Chapter 7 Checking and Troubleshooting
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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.
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.
(1) 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
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