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9-3
Chapter 9. MAINTENANCE & TROUBLESHOOTING
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Intermittent self-diagnostics during operation
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Program error
An error in the program setup data stored to backup RAM has been
detected.
The corresponding alarm code is displayed when this error is
detected.
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Parameter error
An error in the parameter setup data stored to backup RAM has
been detected.
The corresponding alarm code is displayed when this error is
detected.
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●
Low battery voltage error
A drop in the battery voltage for backing up RAM data has been
detected.
When the low battery voltage error is detected, the red BAT LED on
the console blinks.
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Self-diagnostics only when certain functions are operating
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MFB (motor feedback) adjustment error
This error is detected when MFB automatic adjustment is not going
smoothly on 2G output models.
The corresponding alarm code is displayed when this error is
detected.
To clear this alarm, either execute automatic adjustment again or
turn the power OFF then back ON again.
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Alarm code display
When an input error or controller error is detected in the basic
display state, the alarm code and regular display are displayed alter-
nately every second on the program No. and segment No. displays.
The table below shows alarm codes and alarm descriptions.
When two or more alarms occur at the same time, the alarm codes
are displayed from the smallest number upwards together with the
regular display.
However, note that when setup data
C
6
7
has been set to “1”, alarm
codes are not displayed.