Configuring Unit Size Codes - Lennox G71MPP Installation Instructions Manual

Configuring Unit Size Codes

Power−up − Unit Size Code number displayed represents unit size code (furnace model size
and capacity). If three horizontal bars are display followed by continuous E203, Furnace
control does not recognize unit size code (furnace model size and capacity).
To enter Field Test
Mode; Push and hold
button next
7−segment LED display
until solid dash symbol
appears,
button.
If alarm
furnace
display error code, if
alarm is not present solid
dash starts blinking on
7−segment LED display
Push and hold button until the solid P
symbol is displayed on the 7−segment
LED, then release button. This mode
allows the user to select a unit size code
number that matches the furnace model
size and capacity.
IMPORTANT: Field replacement controls may
need to be manually configured to validate
furnace unit size code.
Solid
blinking
7−Segment LED
Push and hold button to allow furnace control
to display unit size code number for each
different furnace model for five seconds.
Yes
to _
release
is present,
control will
_
P
P starts
P
on
Furnace control in IDLE mode
(Decimal point blinking. No
heating, cooling or indoor fan
operation)
When the correct unit sized code is displayed,
release button. Selected code will flash for 10 second
period. During that period, hold push button until
code stops blinking (disappear for
Furnace control will store code in memory and will
automatically exit Field Test Mode and reset. (If
second period expires or push button is held less
than five seconds, control will automatically exit
Field Test Mode and go into IDLE mode without
storing unit size code. If this happens, configuring
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 IFC, the 7−segment LED
will display a unit size code. If three horizontal
bars display, board does not recognize unit
size code. Programming function must be
repeated)
Page 64
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No
Turn room thermostat to OFF
UNIT SIZE
CODE FURNACE MODEL
0 G71MPP−36B−070
1 G71MPP−36C−090
2 G71MPP−60C−090
3 G71MPP−60C−110
4
G71MPP−60D−135
2 seconds).
FINISHED
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