Vaidnor VDF730 Series, Руководство пользователя

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VDF730 User Manual Product Information
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25
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WARNING
Do not repair or maintain the AC drive immediately after power
-
off because there is still voltage
on the flter capacitor
.
Wait unitl the CHARGE indicator becomes OFF and the bus voltage
measured by the multimeter is lower than 36 V
.
Routine maintenance involves checking
:
• Whether the installation environment of the AC drive changes
• Whether the cooling fan works properly
• Whether the motor vibrates excessively
• Whether the AC drive overheats
Routine cleaning involves
:
• Keeping the AC drive clean all the time
.
• Removing the dust
,
especially metal powder
,
from the surface of the AC drive
,
to prevent
the dust from entering the AC drive
.
• Clearing the oil stain on the cooling fan of the AC drive
.
2
.
6
.
2 Periodic Inspection
Perform periodic inspection on the items that are diffcult to check during running
.
Periodic
inspection involves
:
• Checking and cleaning the air flter periodically
.
• Checking whether the screws become loose
.
• Checking whether the AC drive is corroded
.
•
Checking whether the wiring terminals have arc signs
.
• Carrying out the main circuit insulation test
.
Note
Before measuring the insulating resistance with megameter
(
500 VDC megameter recommended
),
disconnect the main circuit from the AC drive
.
Do not use the insulating resistance meter to test
the insulation of the control circuit
.
The high voltage test need not be performed again because it
has been completed before delivery
.
2
.
6
.
3 Replacement of Vulnerable Components
Vulnerable components of the AC drive include the cooling fan and filter electrolytic
capacitor
.
Their service life is related to the operating environment and maintenance
.
The service life of the two components is listed in the following table
.