DNH DHVC5000 Series, Use Manual

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1.4.2 Inverter Unit State
Click the ‘Inverter State’ button on the Real-Time Data Screen to view the inverter unit state,
as shown in Fig.1-27:
Fig.1-27 U Phase Inverter Unit State Screen
As shown in the figure above, when the inverter unit does not work, all of the corresponding
icons in the table are grey. During normal operation of the inverter unit, units in an operating state
have green icons and the rest of the units have grey icons. When a unit fails, the corresponding
icons are red and the colour of the rest of the icons are grey. During the bypass operation of the
inverter unit, the operating state and unit bypass states have green icons and the rest of the units
have grey icons. The unit voltage column displays current voltage values from the DC side of the
corresponding inverter unit.
On this screen, click the ‘Phase V Cells State’ button to view the state of the phase V inverter
unit and click ‘Phase W Cells State’ button to view the state of the phase W inverter unit.
For descriptions of the inverter unit state, see Table 1-2.
Table 1-2 MVC Inverter Unit State
Inverter unit state Remarks
Down_Comm
The unit could not receive data from the optical fibre, shown red in the event of
a fault
Up_Comm
Controlling machine could not receive data from the optical fibre, shown red in
the event of a fault
Running Indicate the state of running unit, green represents the unit in an operating state
No. 1- 4 IGBT
Indicator corresponds to an IGBT fault for a specific unit, shown red in the event
of a fault
Temp_Over
The unit temperature exceeds the setpoint, shown red in the event of
overtemperature
V_Less
Voltage on the DC side is lower than the setpoint, shown red in the event of
undervoltage
V_Over
Voltage on the DC side is higher than the setpoint, shown red in the event of
overvoltage
Bypass
Indicate the bypass position when the unit faults during MVC operation, green
represents the unit is in bypass state