EC5000
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Maintenance inspection
8
operation with cover removed begin.
2.No one other than the appointed operators could perform
maintenance and part replacement and other operations.(Metal objects
such as watches and rings should be taken off before operation, and use
tools with insulation in operation.)
3.Rebuilding the AC drive is absolutely forbidden.
4.Avoid electric shock and facility accident.
List of Periodic Inspection
Inspection Items Inspection Method
Spot
Check
Period
Cheeck site
Environment
Confirm environment
temperature, humidity,
vibration and whether
there’s dust, gas, oil mist
and water drops and so on.
With eye survey and
apparatus measuring
Are there any foreign bodies
like tools or dangerous goods
nearby?
With eye survey
Daily
Daily
Voltage
Are voltages of main circuit
and control circuit both
normal?
Measure with a
multimeter
Daily
Daily
Daily
Is the display clear?
With eye survey
Is any character missing?
Keyboard
Display Panel
Is there any abnormal sound
or vibration?
Are the bolts (fasteners)
loose?
Is there any distortion and
damage?
Is there color change due to
overheat?
With eye survey and
hearing
Fasten
With eye survey
With eye survey
Mechanism
Parts
Half
yearly
Half
yearly
Half
yearly
Half
yearly
Maintenance inspection
EC5000
8.1 Daily Inspections
8.2 Periodic Inspection
AC drive consists of multiple parts including electronic parts such as
ICs, resistors, capacitors and transistors as well as cooling fans and
relays and so on. These parts aren’t permanently durable and cannot be
used forever. Even if used under normal environment, once the life
period has exceeded, faults are easily to occur. Therefore, preventive
periodic check is necessary, in order to find out the parts with poor
quality or those fall short of the standard, and eliminate the causes for AC
drive malfunction. At the same time, the parts that have exceeded their
life period could also be replaced, so as to ensure fine operation.
During power-up and operation, without taking away the cover,
check the operation of AC drive with eye survey from outside and confirm
that there’s nothing abnormal. Usually, check the followings:
■whether the operation performance accord with the regulation
■whether the environment accord with the regulation
■whether keyboard panel display is normal
■whether without abnormal noises, vibrations and abnormal odor
■whether without abnormality such as overheat or change in color
Before doing the periodic inspection, first stop operation, shut off
power supply and take away the cover.
Even when the power supply of the AC drive is shut off, there’s still
charged voltage on the filter capacitors and it takes some time to
discharge. In order to avoid the danger, be sure to wait until the charge
indicator goes out and test with a voltmeter to ensure the voltage is lower
than safe value(≤25Vdc) before the operation of inspection.
1.For AC drives ≤ 22kW, wait 5 minutes after shutting down the
power, and wait 10 minutes for those ≥ 30kW. Not until the DC voltage
between terminals N- and P+ is lower than DC25V could examination
Notice!
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