6-11SectionSystem Maintenance
156
Press Quit to return to the screen number
selection screen.
Press Disp.
T 015003
RUN
BOILER OPERATION
T 015301
STOP
T 016312
ERROR
L 020000
Start Confirmation Stop Confirmation Error Occurrence
L 020005 L 020013
Touching the top or bottom of the screen
changes
the way the display elements over
-
lap each
other
in the order in which they are
registered.
In this example, the bottom portion of the
touch
switch, which is
under the lamp, will be
displayed over the lamp.
T 015003
RUN
BOILER OPERATION
T 015301
STOP
T 016312
ERROR
L 020000
Start Confirmation Stop Confirmation Error Occurrence
L 020005 L 020013
When you have finished
checking the screen,
press
the center area of the screen to
return
to
the SCREEN DA
TA CHECK screen.
If
you wish to continue by checking another
screen, repeat the operation, start
-
ing by specifying the screen number.
To end the operation, press Quit on the screen number selection screen. The
NT21 returns to the MAINTENANCE MODE MENU screen.
6-11-6 Device Check
The NT21 provides checks on the functions of the following items.
• Buzzer Page 157
• LED Page 158
• LCD Page 158
• Backlight Page 158
• Screen data memory Page 159
• Touch switches Page 160
• Battery voltage Page 160