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Data Port
Error Codes
N-550B
Table 10 lists a symptom for data port problems and recommended actions. If
the action requires replacement of the User Interface PCB, refer to
Disassembly Guide on page 53.
Table 10: Data Port Problems
Symptom
No printout is being
received.
When the N-550B detects a defective sensor connected to the N-550B, the
N-550B displays an error code of "SEN Err." The sensor should be replaced
and the N-550B power should be cycled.
An error code is displayed when the N-550B detects a non-correctable failure.
Cycling the power clears these errors. Table 11 lists the N-550B error codes
and their meanings. When one of these errors occur, the N-550B:
•
sounds a low priority alarm that cannot be silenced except by
power-down
•
stops measurements
Recommended Action
The N-550B is running on battery power. Connect the
N-550B to AC power.
The N-550B's baud rate does not match the printer.
Change the baud rate of the N-550B following
instructions in the Operator's manual.
Check the connection between the data port and the
printer. Refer to Connecting To The Data Port on
page 97.
Replace the Front Panel PCB. Refer to Front Case
Disassembly on page 57.
Troubleshooting
49
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