UHM-DHM-SF-1H 5
Service Facts
USER INTERFACE DISPLAY
USER INTERFACE
ENTER
Push left & right
to scroll through
menu options
Push up & down
to scroll through
setup menu
Push ENTER
to make selection
Viewing Window
User Interface pictured above adjusts variable speed airflow options and other unit settings
Service procedure to access the User Inter-
face for the Modulating Furnace
This procedure must only be performed by trained
service personnel.
WARNING
!
ELECTRICAL SHOCK HAZARD
DO NOT BYPASS THE DOOR SWITCH BY ANY PER-
MANENT MEANS.
FAILURE TO FOLLOW WARNING COULD RESULT IN
SERIOUS PERSONAL INJURY OR DEATH.
WARNING
!
ELECTRICAL SHOCK HAZARD
DO NOT TOUCH ANY COMPONENTS OTHER THAN
THE DISPLAY ASSEMBLY AND THE DOOR SWITCH
DURING THIS PROCEDURE.
FAILURE TO FOLLOW WARNING COULD RESULT IN
SERIOUS PERSONAL INJURY OR DEATH.
1. Remove Blower Door panel by turning the two
door latches ¼ turn.
2. Lower door panel and remove from service access
area.
3. Using one hand, depress the door switch (there
must be power to the control system for the Dis-
play Assembly to function) and keep the door
switch depressed during programming.
4. Using the other hand move through the Display
Assembly menu using the arrow buttons.
5. The User Interface menu on pages 5 and 6 is a
guide to the menu options.
6. When programming is complete release door
switch and replace the Blower Door.
4
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