Status Indicators; Panel Leds And Fault Messages - Advanced Energy MDX II User Manual

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Advanced Energy
Table 8-1. General Fault Conditions
Fault Condition
Serial port will not commu-
nicate
Unstable or excessive arc
condition

Status Indicators

Several types of status indicators let you monitor potential problem conditions that can cause
the MDXII unit to shut off output or prevent output from being turned on.

PANEL LEDS AND FAULT MESSAGES

• The two-line display on an active front panel or active remote panel displays a fault
message when a fault condition occurs.
• LEDs on a passive panel light when a potential problem exists.
Table 8-2 on page 8-5 describes the problems that are accompanied by a lit LED, a fault
message on the two-line display, or both. The table also suggests actions to take to resolve the
problems. The problem indicators in the table are listed alphabetically.
Note: Depending on how your MDXII unit is configured (for example, you may not have a
passive panel) you may or may not be able to observe all the indicators listed in the
table.
WARNING:
To avoid electrical shock, ensure that you use extreme caution when you make voltage
measurements.
8-4
Explanation
The address and baud rate
between the host computer
and the MDXII unit is mis-
matched.
Often you can correct this
condition by changing trip
levels or delay time.
Troubleshooting and Customer Support
Suggested Action
Verify the address and baud
rate switch selections on the
rear of the unit (see informa-
tion beginning on page 7-5).
Verify the serial port con-
nections.
If you change the serial port
switch selections, turn off
the output and cycle power
to the unit.
Change the Varc or Iarc trip
level to a level away from
the normal operating condi-
tion of the unit.
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