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Chapter 9. MAINTENANCE & TROUBLESHOOTING 9-1
9 - 1 Maintenance
9-1
9 - 2 Self-diagnostics and Alarm Code Display 9-2
Self-diagnostics at power ON 9-2
Self-diagnostics at each sampling cycle 9-2
Intermittent self-diagnostics during operation 9-3
Self-diagnostics only when certain functions are operating 9-3
Alarm code display 9-3
Alarm categories 9-4
9 - 3 Trouble during Key Entry 9-5
The program No. does not change by pressing in basic dis-
play state 9-5
The program No. does not change by pressing in the basic
display state 9-5
The controller does not change to RUN mode by pressing in
the basic display state 9-5
The controller does not change to HOLD mode by pressing
in the basic display state 9-5
The controller cannot be reset by pressing + in the
basic display state 9-6
The program is not advanced by pressing + in the basic
display state 9-6
The controller does not change to FAST mode by pressing +
in the basic display state 9-6
The controller does not change to MANUAL mode by pressing
in the basic display state 9-7
The controller does not change to AUTO mode by pressing in
the basic display state 9-7
Auto-tuning (AT) is not started by pressing in the basic dis-
play state 9-7
Auto-tuning (AT) is not canceled by pressing in the basic dis-
play state 9-7
Setting group other than “
P
A
R
A
” is not displayed by pressing
by selecting the setting group in parameter set state 9-7
Setting group other than “
S
E
T
” is not displayed by pressing
by selecting the setting group in parameter set state 9-8
The controller does not enter the setting entry state by pressing
in the parameter setup state 9-8
The controller does not change to setup group selection state
and setting entry state continues by pressing in parameter
setting entry state 9-8
The controller does not change to program setup state by press-
ing + in the basic display state 9-8
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