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Chapter 2 Faults and Troubleshooting Innovation Series Medium Voltage GP Type - G Drives GEH-6385
Types of Faults
There are currently two t ypes of fault conditions:
• Alarm faults indicate conditions that you sh ould note, but that are not serious
enough to automatically shut down or trip the drive. If the condition goes away,
some alarm faults clear themselves and the display then identifies the alarm as
brief. Otherwise, you must stop the drive to clear this type of fault.
• Trip faults indicate a more serious condit ion that needs to be corrected.
Therefore, it trips the drive. The drive should not be restarted until the condition
is corrected.
You can clear most fault s by selecting Clear Faults on the drive’s ke ypad or in the
(optional) toolbox program.
Fault Indication
The DSPX board is the
IS200DSPX Digital Signal
Processor, located in the
drive control rack.
The drive indicates a fault condition on the keypad, toolbox display, and on the
DSPX board.
On the keypad, a fault icon appears in the right si de of the display: The operator can
then use the keypad to access t he fault/alarm descripti on (see Figure 5-1) and to clear
the fault.
ACTIVE FAULT
50 Trip HtSink temp low,
108 Brief DC bus voltage
12 Trip Gnd flt,
113 Trip Invalid board
--- RESET FAULTS NOW --
Fault No.
Fault Behavior
Abbreviated Description
Fault Icon:
Flashing = fault
Not flashing (on steady) = alarm
Figure 2-1. Sample Fault Display Screen on Keypad
The toolbox uses a Windows-based PC display. Wh en a fault occurs, the word
Alarm or Trip appears in the lower right corner of the screen. You can view a
description and clear the fault using the toolbox functions. (GE publication GEH-
6401 describes these tools and this feature.)
The DSPX Fault LED disp lays at the front of the drive’s contr ol rack. This red
indicator is on solid for a fault and flashes for an alarm.
A fault is identified by an assigned number and abbrevia ted description. Both of
these are displayed when an operator examines a fault usin g the keypad (see Figure
2-1) or the toolbox.
Table 2-1 lists the drive fa ults and their probable cause.