SYSTEM OPERATION
16
3. The screen will now display Menu L6F (Last 6 Faults).
Continue pressing and releasing the Right Button
until you see FSd which is the menu for Constant Fan
Multiplier. Before reaching the FSd menu you will scroll
through Menus L6F, Lm, Cr, Sr and rFd.
LEFT
CENTER
RIGHT
Press then Release
4. Press and release the Center Button. The center button
is used to enter menus and make selections within
menus.
5. What will be displayed is the currently selected fan only
percentage. For this example the assumption is that
this currently selected fan only percentage is 25% and
changing this to 45% is the objective.
6. Press and Release the Right button. The screen will
change to 35 and start flashing. The flashing indicates
the displayed option has not been selected yet.
7. Press and Release the Right button again. The 7
segment displays will continue flashing but will now
display 45.
LEFT
CENTER
RIGHT
Press then Release
8. Press and Release the Center Button again. The 45
being displayed will stop flashing. To then complete
the selection process and make 45 the official fan only
setting Press and Release the Center Button for the last
time. This final step will jump the user back to the main
menu list and FSd will be displayed again.
9. The constant fan multiplier has now been changed from
25 to 45.
Airflow Display
When the blower is running the CFM will be displayed in
Status Menu. The first 7 segment character will display “A”.
The second & third characters will display the actual CFM
divided by 100. The actual CFM will display rounded up or
down to the nearest 100 CFM as follows:
•
550 to 649 CFM display as “
A06
”
•
1150 to 1249 CFM display as “
A12
”
Alarm Display
If an active alarm is present, the alarm code shall be
reported in Status Menu starting with “E” and following with
the appropriate two digit alarm code.
Clearing Faults
While in the Last 6 Faults option menu, push & hold the
center button for 5 seconds. This will clear all non-active
alarm(s) in the Last 6 Faults menu. The display will flash
three times to confirm faults have been cleared.
Learn Menu
Using this option resets the communicating network which
will cause the furnace to discover what devices are present
on ClimateTalk™ network. This menu will not appear when
the furnace control is connected to a Non-Comm OD unit.
Code Release Number Menu
This is a reference only menu to display the firmware
release revision numbers for each micro-controller.
Constant Fan Speed Menu
This menu allows for adjustment of the multiplier for
constant fan operation in 10% increments. Each furnace
has a “Maximum CFM” determined by motor HP. All
fan operations are based off of multipliers which are
percentages of this number. Max CFM is shown below. The
default constant fan multiplier is 25%.
Model
Max CFM
3 Ton Models
1400
4 Ton Models
1760
5 Ton Models
2200
Gas Heat Airflow Multiplier Menu
The menu is used to change the gas heat airflow multiplier
for gas heat operation. In most cases the default gas heat
airflow will provide a temperature rise near the middle of
the acceptable range. The multiplier will be expressed by
the 2
nd
& 3
rd
characters of the display as a percentage of
max CFM.
Gas Heat Fan Off Delay Menu
The default setting is 90 seconds. The available adjustment
range is from 30 to 180 seconds in 30 second increments.
Gas Heat Fan On Delay Menu
The default setting is 30 seconds. The available adjustment
range is from 5 to 30 seconds in 5 second increments.
