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CHAPTER 8: TROUBLESHOOTING
8.2 ERROR CODES LIST
CODE CLASS DESCRIPTION MACHINE SOLUTION
0440 B
Timeout receive
packet
Communication
Errors
a. Enter the Engineer mode disable B Level Error, bypass CLASS A and B error code.
b. Check the connection of the console cable at both ends and perform continuity test.
c. Replace MCB.
0441 B
When UCB imple-
ments a command,
but the LCB/MCB
cannot execute the
command
Communication
Errors
Enter the Engineer mode disable B Level Error, bypass CLASS A and B error code.
0442 B
The received com-
mand code from the
console is correct
and is supported,
but the data sent/
transferred is wrong
Communication
Errors
Enter the Engineer mode disable B Level Error, bypass CLASS A and B error code.
04A0 C
MCB does not have
communication
response from UCB
Communication
Errors
Delta MCB only:
a. If the display is giving an 04A0 error, LED DSP2 (RS485) should be off. Recycle
power..
b. Check the connection of the console cable at both ends and perform continuity test.
c. Swap console with known good if connections are good. Replace the console.
d. Replace the MCB.
04B0 C
UCB does not have
communication
response from MCB
Communication
Errors
Delta MCB only:
a. If the display is giving an 04A0 error, LED DSP2 (RS485) should be off. Recycle
power..
b. Check the connection of the console cable at both ends and perform continuity test.
c. Swap MCB with known good if connections are good. Replace the MCB.
d. Replace the console.
04B1 C
IO board does not
have communication
response
Communication
Errors
a. Replace UCB.
04XX: Communication Errors
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