ELECTRICAL SYSTEM 2250 SERVICE/MAINTENANCE MANUAL
3-36
Published 07-19-16, Control # 249-01
Troubleshooting Procedure
1. Note all crane functions that were in operation when I/O
Board Fault came on.
2. Note any additional crane faults listed on the crane
display to include any previous crane faults.
3. Power down the crane for a minimum of five minutes.
4. Restart the crane and note any faults listed on the crane
display.
5. If I/O Board Fault is still on, remove the programmable
controller cover located in the operator’s cab behind the
seat. Note the state of the LED on each board if
equipped.
6. Power down the crane.
7. Note the locations of the I/O boards in relation to the
CPU board in Figure 3-25
. Each board has a lettered
sticker between “C” and “F” that must be noted.
8. Reference Table 3-11
and verify that the corresponding
I/O board is seated firmly in the controller motherboard.
9. If the corresponding I/O board is not seated firmly in the
mother board of the controller, firmly seat the I/O board
into the mother board. Restart the crane and check for
faults listed on the crane display. If I/O Board Fault is still
on, continue to step 10
. If I/O Board Fault has cleared,
communication has been restored and all inputs have
been enabled. Replace the controller cover. The
remaining troubleshooting steps are not necessary.
10. If the corresponding I/O board is seated firmly in the
controller’s mother board, shut down the crane and
swap its location with one of the other three I/O boards in
the programmable controller.
11. After the board is relocated and seated firmly in the
controller’s mother board, leave the cover open and
power up the crane.
12. Note the active I/O Board Fault as it may have changed
from the previous fault and call the Manitowoc Crane
Care Lattice Team for technical support and additional
troubleshooting procedures.
Table 3-11. I/O Board Fault Table Reference Guide
CAUTION
Equipment Damage Hazard!
Prevent equipment damage from static electricity.
An electrostatic wrist band grounded to the programmable
controller must be worn during any contact with the circuit
boards to prevent a possible discharge of static electricity
to the circuitry.
Fault Controller Location Fault Controller Location
I/O Board Fault 1 I/O Board 1 I/O Board Fault 9 I/O Board 1 and 4
I/O Board Fault 2 I/O Board 2 I/O Board Fault 10 I/O Board 2 and 4
I/O Board Fault 3 I/O Board 1 and 2 I/O Board Fault 11 I/O Board 1, 2, and 4
I/O Board Fault 4 I/O Board 3 I/O Board Fault 12 I/O Board 3 and 4
I/O Board Fault 5 I/O Board 1 and 3 I/O Board Fault 13 I/O Board 1, 3, and 4
I/O Board Fault 6 I/O Board 2 and 3 I/O Board Fault 14 I/O Board 2, 3, and 4
I/O Board Fault 7 I/O Board 1, 2, and 3 I/O Board Fault 15 I/O Board ALL
I/O Board Fault 8 I/O Board 4 — —
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