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FOR REFERENCES ONLY
13. Inspection and maintenance
The equipment must be inspected every day.
If the equipment is not inspected and maintained, errors and malfunctions may not be discovered
which could lead to accidents.
Before inspection, perform the following steps.
(1) Shut off all input power to the inverter.
Mandatory
(2) Wait at least 15 minutes and check to make sure that the charge lamp is no longer lit.
action
Performing an inspection without carrying out these steps first could lead to electric shock.
Be sure to inspect the inverter regularly and periodically to prevent it from breaking down because of the environment
of use, such as temperature, humidity, dust and vibration, or deterioration of its components with aging.
13.1 Regular inspection
Since electronic parts are susceptible to heat, install the inverter in a cool, well-ventilated and dust-free place.
This is essential for increasing the service life.
The purpose of regular inspections is to maintain the correct environment of use and to find any sign of failure or
malfunction by comparing current operation data with past operation records.
Subject of
inspection
Inspection item
1) Dust, temperature
and gas
1. Indoor
environment
2) Drop of water or
other liquid
3) Room temperature
2. Units and
1) Vibration and noise
components
1) Load current
3. Operation
2) Voltage (*)
data
(output side)
3) Temperature
*)
The voltage measured may slightly vary from voltmeter to voltmeter. When measuring the voltage,
always take readings from the same circuit tester or voltmeter.
VFNC3C ENGLISH MANUAL
Warning
Inspection procedure
Inspection
Inspection method
cycle
Occasionally
1) Visual check, check
by means of a
thermometer, smell
check
Occasionally
2) Visual check
Occasionally
3) Check by means of
a thermometer
Tactile check of the
Occasionally
cabinet
Occasionally
Moving-iron type AC
ammeter
Occasionally
Rectifier type AC
voltmeter
Occasionally
Thermometer
N-1
NOT SUBJECTED FOR RESALE
Criteria for judgement
1) Improve the environment if
it is found to be
unfavorable.
2) Check for any trace of
water condensation.
3) Max. temperature: 60°C
Is something unusual is
found, open the door and
check the transformer,
reactors, contactors, relays,
cooling fan, etc., inside. If
necessary, stop the
operation.
To be within the rated
current, voltage and
temperature.
No significant difference
from data collected in a
normal state.
14
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