X. Maintenance
This chapter describes the general maintenance plan for MVF2000 medium voltage drive,
and all the preventive maintenance as well as spare parts replacement that can be
accomplished by the user and Delta
’s service personnel. Moreover, the preventive
maintenance and safety cautions that must be observed by the user are described in detail.
The maintenance tasks conducted by the user is mainly limited to various visual
inspections, air filter cleaning, and keeping the installation room as clean as possible.
Caution!
Only authorized trained personnel can conduct maintenance on the
MVF2000 high voltage inverter.
Do not conduct any maintenance, spare parts replacements or other
related operations which are not mentioned in this manual.
Do not revise the system program or connect other equipment with the
inverter. If needed, the user must contact our technical personnel and
changes must be agreed and implemented by our technical personnel
after approval.
10-1 Standard maintenance process
To ensure safety, the following steps shall be observed:
1.
Safety measures: Make sure you are familiar with and will completely abide by the safety
measures and cautions described in this manual.
2.
Cut off the system power: all the repair operation shall be conducted under mains and
auxiliary power in disconnected state. In addition, UPS shall be shut down for
maintenance.
Caution!
Do not touch the main circuit and the motor before the system is
powered off and earthed. When the main power is cut off and the motor
stops, the discharge of the DC capacitance in the power cells may
require 15 minutes. After the earthing is done and verified, maintenance
can be conducted.
Even if the main voltage and the external voltages of the MVF2000 is
cut off, high voltage may still exist in the interior of the MVF2000
cabinets and the 15 min after power cut off shall be observed before
maintenance can be done.
Output voltage detection wire will connect to AD board in the main
control box, and a transient high voltage will be generated in a second
of the wire disconnected while the high voltage is raising; therefore, any
wire connection/disconnection to AD board terminal is forbidden during
the process.
3.
Conduct the necessary maintenance: Please refer to the maintenance plan and the
specific instructions.
4.
After maintenance, please check before power-on.
The connections of the main power and the motor are in good condition.
The connections of the auxiliary power and the control circuit are in good condition.
Summary of Contents for MVF2000 Series
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