Rockwell Automation 20Y PowerFlex Active Front End - Manual (Page 117)

Rockwell Automation Publication 20Y-UM001E-EN-P - July 2014 117
Troubleshooting Chapter 5
Manually Clearing Faults
Fault and Alarm Descriptions
Steps
1. Press the HIM (Escape) key to acknowledge the fault.
The fault information is removed so that you can use the HIM.
2. Address the condition that caused the fault.
The cause must be corrected before the fault can be cleared.
3. After corrective action has been taken, clear the fault with one of these methods:
• Press the HIM (Stop) key.
• Cycle power to the AFE.
• Set AFE parameter 121 - [Fault Clear] to ‘1’ (Clear Faults).
• ‘Clear Faults’ by using the HIM Diagnostic menu.
Esc
Table 21 - Fault/Alarm Types, Descriptions, and Actions
No. Name
Fa
ul
t
Al
arm
Description Action (if appropriate)
1 PrechargeActv ➊ The charging switch is open, when the START
command has been given.
• Faulty operation
• Component failure Reset the fault and restart.
Should the fault re-occur, contact Technical
Support (see
page 124 ).
2 Auxiliary In ➀ The auxiliary input interlock is open. Check all remote wiring.
4 DC UnderVolt ➀
➂ ➊ The DC bus voltage fell below the minimum value of
333V for 400/480V AFEs or 461V for 600/690V AFEs.
You can enable/disable this fault with parameter 120
[Fault Config]. Monitor the incoming AC line for low voltage or
power interruption.
5 DC OverVolt ➀ The DC bus voltage exceeded the maximum value of
911V for 400/480V AFEs or 1200V for 600/690V AFEs. 1. Check if the AFE was in a regenerative current
limit condition, which may indicate an excess
regenerative load.
2. Adjust parameter [Regen Power Lmt].
3. Monitor incoming AC line for high voltage or
voltage transients.
7 Overload ➂ When input current exceeds 125% for 60 seconds or
150% for 30 seconds. The overload is a linear type in
counting up. Reduce the current consumption of the AFE or
increase parameter 133 [Cnvrtr OL Factor].
8 HeatsinkOvrTp ➁ ➊ The heatsink temperature has exceeded the
maximum allowable value.
85 °C = Alarm
90 °C = Fault 1. Verify that the maximum ambient
temperature has not been exceeded.
2. Check the fans (including the ASIC board on
frame 10 and higher converters).
3. Check for an excess load.
9 IGBT OverTemp ➀ The output transistors have exceeded their maximum
operating temperature due to an excessive load. 1. Verify that the maximum ambient
temperature has not been exceeded.
2. Check the fan or fans.
3. Check for an excess load.
10 System Fault ➁ A hardware problem exists in the power structure. 1. Cycle the power.
2. Verify the fiber optic connections.
3. Contact Technical Support (see page 124 ).
4. If the problem persists, replace the converter
unit.
12 AC OverCurr ➀ The AC line current has exceeded the hardware
current limit. Check programming for an excess load or other
causes of excess current.