E6581595
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14
14. Inspection and maintenance
Warning
Mandatory
action
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.
(2) Wait at least 15 minutes and check to make sure that the charge lamp is no longer lit.
(3) Use a tester that can measure DC voltages (400V DC or more), and check that the voltage to the
DC main circuits (across PA-PC) does not exceed 45V.
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.
14.1 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 procedure
Criteria for judgement
Inspection item
Inspection
cycle
Inspection method
1. Indoor
environment
1) Dust, temperature
and gas
Occasionally
1)Visual check, check
by means of a
thermometer, smell
check
1)Improve the environment if
it is found to be
unfavorable.
2) Drop of water or
other liquid
Occasionally
2)Visual check
2)Check for any trace of
water condensation.
3) Room temperature
Occasionally
3)Check by means of
a thermometer
3) Max. temperature: 60°C
2. Units and
components
1) Vibration and noise Occasionally
Tactile check of the
cabinet
Is something unusual is
found, open the door and
check the transformer,
reactors, contactors, relays,
cooling fan, etc., inside. If
necessary, stop the
operation.
3. Operation
data
(output side)
1) Load current
Occasionally
Moving-iron type AC
ammeter
To be within the rated
current, voltage and
temperature.
No significant difference
from data collected in a
normal state.
2) Voltage (*)
Occasionally
Rectifier type AC
voltmeter
3) Temperature
Occasionally
Thermometer
*)
The voltage measured may slightly vary from voltmeter to voltmeter. When measuring the voltage,
always take readings from the same circuit tester or voltmeter.
