NoteAction
If the connection and cables seem OK, proceed
with step 3.
Make sure that the cables are con-
nected properly at both ends and
that all sockets/pins are in the cor-
rect position.
2
Verify that the input to 24V_TRUNK is 25.2 VDC
+/- 5%.
• If the 24V_TRUNK voltage is within the
range, proceed with step 5.
• If the 24V_TRUNK voltage is abnormal,
proceed with step 11.
Measure the 24V_TRUNK voltage
at X6.
3
Measure the voltage of L1\L2\L3 to E.Measure the AC input voltage.4
The AC input voltage should be within 380-480
Vrms (-15%~10%) and same with field grid
voltage.
• If the AC input voltage is normal, proceed
with step 11.
• If the AC input voltage is abnormal, pro-
ceed with step 8.
Verify that the voltage on X13 is 0 V.
• If the AC_OK signal is greater than 22 V,
proceed with step 11.
• If the AC_OK signal is lower than 1 V,
proceed with step 6.
Measure the AC_OK signal at X13.5
Verify that the input to 24V_BRAKE_PWR is
25.2 VDC +/- 5%.
• If the 24V_BRAKE_PWR voltage is in the
range, proceed with step 7.
• If the 24V_BRAKE_PWR voltage is abnor-
mal, proceed with step 11.
Measure the 24V_BRAKE_PWR
voltage at X11/X14.
6
Verify that DC BUS (X4/X8) is 650 +/- 3% VDC.
• If the DC BUS voltage is normal,
troubleshoot other modules.
• If the DC BUS voltage is abnormal, pro-
ceed with step 11.
Measure the DC BUS voltage at
X4/X8.
7
Check connection between controller power
inlet and power module.
• If the connection is OK, proceed with
step 11.
• If there is a problem with the connection,
repair the connection and start over.
Check the connection from power
inlet to the power module.
8
Verify that AC_OUT (X7/X15) is 230 +/- 10%
VDC.
• If the AC_OUT voltage is normal,
troubleshoot other modules.
• If the AC_OUT voltage is abnormal, pro-
ceed with step 11.
Measure the AC_OUT voltage at
X7/X15.
9
Continues on next page
394 Product manual - OmniCore V250XT Type B
3HAC087112-001 Revision: A
© Copyright 2023-2023 ABB. All rights reserved.
7 Troubleshooting
7.3.6 Troubleshooting the HVLP power unit (DSQC3072)
Continued
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