A.O. Smith BTX-100 Service Handbook page 30

ULTRA HIGH EFFICIENCY POWER VENT/POWER DIRECT VENT - SERVICE MANUAL
UIM (CONT)
Desktop Screen
The Desktop screen is the default screen. If there are no active fault messages the display
will return to this screen with no user input after approximately 10 minutes. The Desktop
screen displays text and icons that provide operational and diagnostic information.
The first line of text on the Desktop screen is the temperature of the water inside the tank.
Tank Temperature data will only be visible on commercial models.
The second line of text on the Desktop screen is the Operating Set Point. The Operating
Set Point is a user setting that can be adjusted in the Temperatures Menu. The Operating
Set Point is the temperature at which the water heater will maintain the water inside the tank.
The third line of text on the Desktop screen shows the current Status of the control system.
The current Operational State of the water heater's control system is displayed in real time.
Operational States are explained on page 31.
CONTROL SYSTEM DESKTOP SCREEN
Note: Tank Temperature will only be visible on commercial models.
Service Note - Sequence of Operation Display
The Desktop screen displays the Sequence of Operation in real time using animated "Status
Icons." This is valuable information when servicing the water heater that can help correctly
diagnose service problems more quickly.
Review the Sequence of Operation on page 40 and the Status Icons explanation in Table 4
on page 30. Learn to use this visual display of the Sequence of Operation when
troubleshooting the water heater. IE: if the Igniter Status Icon comes on but the Check Mark
Status Icon does not appear next to it within 5 seconds the control system has not sensed
minimum igniter current of 2.0 AC amps.
Technical Literature Department
Servicing should only be performed by a Qualified Service Agent
29 of 52
Discreet Menu - Contact Information
While viewing the Desktop screen
(left). Press and hold down the middle
Operational button for 30 seconds
then release it. This will launch a
discreet menu that contains a
provision for adding personalized
contact information that will be
displayed on all fault message
screens. The installing contractor or
service agent can enter their
company name and phone number to
help the home or business owner
contact them for service.
Ashland City, TN © 2008