16 Rockwell Automation Publication 20Y-TG001C-EN-P - April 2017
Chapter 1 Troubleshooting and Error Codes
125 LCL OverTemp The LCL filter has been overheated or
the signal is not connected to input.
Check the LCL filter and signal
connection or verify that digital input 5
is closed. See Chapter 7.
There are nine total thermal switches that are connected in series to monitor
temperature inside the coil of each filter inductor.
X52 is on the LCL filter.
126 LCL Fan Stop The LCL fan has been stopped. Check the LCL fan. See Chapter 7.
Important: This fault occurs only when
a digital input is manually programmed
as option ‘5’.
128 Contact Fdbk The input of the acknowledge signal
from the main contactor is missing.
Check for closure on the following
devices:
• For AFE in IP20 enclosure, input
contactor (K1)
• For AFE in IP21 enclosure, MCCB (Q1)
Check digital input 4 on the control
board of the power structure.
133 DigInConflict Digital input functions are in conflict. Check the parameter settings of
parameters 221…226.
138 DCRefLowLim DC voltage reference is less than the
limit in parameter 080 [DC Ref Lo Lmt].
Check the parameter setting.
Verify the bus voltage to be above the
parameter value.
Troubleshoot the cause of the low
voltage condition.
139 DCRefHighLim DC voltage reference exceeds the limit
in parameter 081 [DC Ref Hi Lmt].
Check the parameter setting.
Verify the bus voltage to be below the
parameter value.
Troubleshoot the cause of the high-
voltage condition.
140 DCBusLoAlarm DC voltage is less than the value set by
parameter 078 [DC Bus Lo Alarm].
Check the parameter setting.
141 DCBusHiAlarm DC voltage exceeds the value set by
parameter 079 [DC Bus Hi Alarm].
Check the parameter setting.
No. Name Description Action (if appropriate)
Thermal Switch 1 Thermal Switch 9
To Digital
Input 5
X52
Frame 10 LCL Filter
X52 Approximate
Location
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