LS SV0008iS7-2, Руководство пользователя

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Chapter 7 Checking and Troubleshooting
7-11
7.1.5 Daily and regular checkup list
LS Inverter, SV-iS7, 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.

If the inverter has not been operated for a long time, capacitors lose their
charging characteristics and are depleted. To prevent depletion, turn on
the product once a year and allow the device to operate for 30-60 min.
Run the device under no-load conditions.
(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