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To enter
Program
Unit Capacity/
Size
mode: Push
and hold button
next to 7-segment LED display until solid
“
P
” symbol appears. Release button.
IMPORTANT
: Field replacement controls
may need to be manually configured to
validate furnace unit size code.
UNIT SIZE
CODE
FURNACE MODEL
7
NF97D070M3B
9
NF97D090M4C
11
NF97D110M5C
Furnace
control
in IDLE mode (No
heating, cooling, or
indoor fan operation)
Turn room thermostat to OFF.
When the correct unit size code is displayed, release
button. Selected code will flash for 10-second period.
During that period, press and hold button for 5 seconds.
Integrated control will store code in memory and will
automatically exit
Field Test
mode and reset. (If second
period expires or button is held less than 5 seconds,
control will automatically exit
Field Test
mode and go
into
Idle
mode without storing unit size code. If this
happens, programming function must be repeated.)
Verify that the selected unit size code is correct and
stored in non-volatile memory by cycling the 24 volt
power to the furnace control. (At 24 volt power-up of
the furnace control, the 7-segment LED will display a
unit size code. If three horizontal bars display, the board
does not recognize the unit size code. The programming
function must be repeated.)
FINISHED
If alarm is present, furnace
control will display error
code. If alarm is not present,
solid dash starts blinking on
7-segment LED display.
To enter
Field Test
mode: Push and
hold button next
to 7-segment LED
display until
solid
dash
symbol appears. Release button.
Power-Up - Number displayed by integrated control represents unit size code (furnace
model and capacity). If three horizontal bars are displayed followed by continuous E203,
furnace control does not recognize unit size code. Configure per the following:
Yes
No
Push and hold button. Integrated control
will display unit size code number for
each furnace model for three seconds.
Solid
P
starts blinking on
7-segment LED.
P
P
Configuring Unit Size Codes