Fanuc Power Mate i-D/H Maintenance Manual

B63175EN/03
7. TROUBLESHOOTING
455
An unknown NMI has generated.
This alarm may also be issued when the FANUC I/O link is disconnected
while the Power Mate is being used as the slave of the I/O link.
1) Base PC board or CPU board is faulty
D Base PC board is faulty.
D CPU card is faulty.
2) The power to those units connected to the I/O link is turned off, or a
system alarm is issued.
Turn the power off, then back on again. This clears the alarm.
CAUTION
When the base printedcircuit board is replaced, all data in
the memory will be lost because the memory module is
dismounted. Reset up the data by referring to Chapter 3.
NOTE
With the basic function version 03 and later versions, if the
alarm is due to the I/O Link, alarm 977 is indicated.
7.31
ALARM 973
(NMI ALARM BY
UNKNOWN CAUSE)
Causes and Remedies

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