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Troubleshooting
Scope of Action
Error
Code
520
521
X
522
X
523
1, 2
524
525
X
526
527
528
529
530
531
532
533
534
535
536
537
538
X
539
1
540
541
542
40
Table 4: Error Codes (Continued)
Action
X
Replace UI board.
Replace batteries.
Replace batteries.
3
1 — Restart the NPB-40.
2 — Set the time and date.
3 — Replace UI board.
X
Replace UI board.
X
Restart, replace UI board.
1, 2
1 — Replace SpO
2 — Replace UI board.
1, 2
1 — Replace SpO
2 — Replace UI board.
1
2
1 — Replace UI board
2 — Return NPB-40 for
repair.
1
2
1 — Replace UI board
2 — Return NPB-40 for
repair.
1, 2
1 — Replace SpO
2 — Replace UI board.
1, 2
1 — Replace SpO
2 — Replace UI board.
1, 2
1 — Replace SpO
2 — Replace UI board.
1, 2
1 — Replace SpO
2 — Replace UI board.
1, 2
1 — Replace SpO
2 — Replace UI board.
1, 2
1 — Replace SpO
2 — Replace UI board.
X
Replace UI board.
X
Replace UI board.
Set the NPB-40 time and date. Real time clock value bad.
2
1 — Restart the NPB-40.
2 — Replace membrane
switch pad.
X
Replace UI board.
X
Return NPB-40 for repair.
1
2
1 — Replace UI board.
2 — Return NPB-40 for
repair.
Explanation
Unrecoverable error verify real time
clock.
Battery power is critically low.
System power levels unacceptable for
continued operation.
NVRAM failed consistency check.
NVRAM failed read-after-write
verification.
Time base discrepancy writing error
entry.
board.
Fatal error for SpO
2
board.
Communication failure with SpO
2
board.
Fatal error creating parser.
Fatal error creating parser.
board.
Unrecoverable error with SpO
2
communication.
board.
Unrecoverable error with SpO
2
communication.
board.
Unrecoverable error with SpO
2
communication.
board.
Unrecoverable error with SpO
2
communication.
board.
Unrecoverable error with SpO
2
communication.
board.
Unrecoverable error with SpO
2
communication.
Flash memory failed CRC check.
Fatal system error.
Erroneous key press detected at start.
Fatal system error reading memory.
Fatal software error.
RAM corruption detected during
background check.
communication.
2
2
2
2
2
2
2
2
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Table of Contents
Troubleshooting
