Rockwell Automation Allen-Bradley PowerFlex 4M, Руководство по обслуживанию оборудования

Страница: 20 / 148

20 Rockwell Automation Publication 20P-TG003B-EN-P - September 2021
Chapter 2 Component Test Procedures
Troubleshoot an AC
Undervoltage Fault If the drive faults with an AC Undervoltage Fault (F4), or parameter 466 [AC
Line Voltage] does not equal the expected incoming AC line voltage, measure the
AC line input signals as directed in the steps below.
1. Read the General Safety Precautions on page 10 .
2. Remove the protective covers from the drive. See Protective Cover
Removal and Installation on page 43 .
3. Using a voltmeter, measure the voltage at terminals U, V, and W of the
drive.
Note: If an AC input contactor is used, the voltage must be measured on
both the input and output sides of the contactor.
If any of the voltage measurements is incorrect or missing, remove
incoming AC power and verify the wiring to the drive and the power
supply source and correct any problems.
4. Using a voltmeter, measure the combined voltages of the AC lines on the
following testpoints on the control board (all waveforms have a 2.5V
offset). See
Figure 1 on page 18 and Figure 2 on page 19 for location of the
testpoints. Also, see Figure 16 on page 125 for a schematic diagram.
Table 1 - Combined AC Line Input Signal Testpoints
• If any of the voltage measurements above are incorrect or missing,
continue with step 5 below.
Incoming AC
Line Voltage Phases Measure From
Testpoint … To Testpoint Peak to Peak
Measurement RMS Measurement
240 VAC
V and U XY22 … XY18
1.42 VAC 0.500 V
V and W XY21 … XY18
480 VAC
V and U XY22 … XY18
2.95 VAC 1.040 V
V and W XY21 … XY18
575 VAC
V and U XY22 … XY18
2.85 VAC 1.007 V
V and W XY21 … XY18
690 VAC
V and U XY22 … XY18
3.45 VAC 1.220 V
V and W XY21 … XY18