Rockwell Automation 20Y PowerFlex Active Front End - Manual (Page 120)

120 Rockwell Automation Publication 20Y-UM001E-EN-P - July 2014
Chapter 5 Troubleshooting
125 LCL OverTemp ➀ The LCL Filter has been overheated or the signal is not
connected to input. Check the LCL Filter sensor connections, the fan,
and fan power supply.
There are nine total thermal switches connected in series
to monitor temperature inside the coil of each filter inductor.
X52 is located on the LCL Filter.
128 Contact Fdbk ➋ The input of the acknowledge signal from the main
contactor is missing. Check if the main contactor is closed.
Check the wiring of the feedback signal.
133 DigInConflict ➋ Digital input functions are in conflict. Check the parameter settings to correct the
problem.
138 DCRefLowLim ➊ DC voltage reference is less than the limit in
parameter 080 [DC Ref Lo Lmt]. Check the parameter setting.
139 DCRefHighLim ➊ DC voltage reference exceeds the limit in parameter
081 [DC Ref Hi Lmt]. Check the parameter setting.
140 DCBusLoAlarm ➊ DC voltage is less than the value set by parameter
078 [DC Bus Lo Alarm]. Check the parameter setting.
141 DCBusHiAlarm ➊ DC voltage exceeds the value set by parameter 079
[DC Bus Hi Alarm]. Check the parameter setting.
Table 21 - Fault/Alarm Types, Descriptions, and Actions (Continued)
No. Name
Fa
u
lt
Alarm
Description Action (if appropriate)
Thermal Switch 1 Thermal Switch 9
To Digital
Input 5
X52
Frame 10 LCL Filter Frame 13 LCL Filter
X52 approximate location