ABB OmniCore V250XT Type B - Page 352

Recommended working procedure
If there seems to be a power failure during start-up, use this procedure to
troubleshoot what might cause the problem.
Block diagram
Look at the following block diagram to understand how power is connected from
incoming and forward.
AC
i
nput
L1, L2, L3
Mains
c
onnection
X0
Mains
s
witch
Q0
Power
u
nit
A1
X1 X6
PE1, PE2
L1, L2, L3
Fuse
F
1
L1, L2, L3 L1, L2, L3
Power
supply
ODVA
T6, 79
X1 X1
Process
power
supply
T5, T8
X1
X4
X13
24V SYS DRV
Main computer A2
24V HMI
HMI
connection
X4
FlexPendant
24V HMI
X9
X7/X15
Power distribution
board A2.K1
Safety board A2.K5
24V TRUNK
xx2300001841
Detailed working procedure
NoteAction
LED Module status should be
green.
• If not, see Troubleshooting
the power unit on page 383.
• If the power unit is ok, check
that incoming mains is well
connected and that the in-
coming mains switch is
turned on.
Check Module status LED on power unit A1.1
• If LED TRK is green, pro-
ceed with 5.
• If LED TRK is not green,
proceed with 3.
Check LED TRK on the main computer (Power
distribution board, DSQC1085).
2
Verify that the input to A2.K1.X1 is
25.2 VDC +/- 5%.
• If the measured voltage is
normal, troubleshoot the
main computer. See
Troubleshooting the main
computer on page 416.
• If the measured voltage is
abnormal, proceed with step
4.
Measure the 24VDC_TRUNK at connector
A2.K1.X1.
3
Continues on next page
352 Product manual - OmniCore V250XT Type B
3HAC087112-001 Revision: A
© Copyright 2023-2023 ABB. All rights reserved.
7 Troubleshooting
7.2.2 Start-up failure
Continued