Changing The Display Units; Fault And Warning Conditions; Access To The Current Fault Or Warning - A.O. Smith SERIES 100 Installation & Operating Instructions Manual

4. Changing the Display Units

The display interface to the heater has the option of selecting between
degrees Fahrenheit and degrees Celsius for temperature displays. This
can be found in the "Display Settings" menu. Also in this menu, you may
adjust how the backlight operates and the contrast of the LCD screen.
ACTION:
From the Main Menu, press the DOWN button to highlight "Display
Settings" then press Select.
DISPLAY:
ACTION:
Use the UP and DOWN buttons to highlight the desired setting. Then
press Change. Again, use the UP and DOWN buttons to scroll through
the options for that setting.
DISPLAY:
ACTION:
Press Update to accept the change or Cancel to reject it.
DISPLAY:

5. Fault and Warning Conditions

This water heater is equipped with electronic controls that have the ability
to monitor almost all aspects of the water heater operation. In the case that
there is an undesirable or unsafe condition that occurs, the water heater
controls will detect this condition and determine the appropriate action.
Part of this is displaying the information on the LCD in plain text that accu-
rately describes the condition and diagnostics information that can be used
to correct the issue.
There are two types of conditions that can occur during operation. These
are Warnings and Faults:
• Warnings: This is a non-safety related condition that the control has
detected that may cause the water heater to operate in a less than optimal
condition, but does not pose a safety concern.
NOTE: When these conditions occur, continued heating cycles will con-
tinue and the heater will attempt to regulate the water in the tank to the
Operating Set Point.
Example of a Warning:
• Faults: This is a safety related condition that has been detected by the
heater.
NOTE: When these conditions occur, the water heater will not continue
any further heating cycles and the water will no longer be heated until the
condition is corrected and, in most cases, power has been cycled.
Example of a Fault:
Advanced Diagnostics Information
When a fault or warning has been declared, advanced information can be
found in the control. By pressing the Advanced button, detailed information
can be found regarding diagnosing and resolving the problem.
WARNING: Usage of the Advanced information requires ability
equivalent to that of a licensed tradesmen in the field involved.

6. Access to the Current Fault or Warning

When a fault or warning has been detected by the control, it will automati-
cally be displayed on the screen and the back light will blink. If you choose
to leave the current fault or warning by pressing the Back key, you can
always return to the fault screen through the menu.
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