Fault And Warning Conditions - Advanced Diagnostic Information - A.O. Smith BTH 120 Series Service Handbook

FAULT AND WARNING CONDITIONS – ADVANCED DIAGNOSTIC INFORMATION
This water heater control has the ability to monitor almost all aspects of the water heater's operation. In the
event of an undesirable or unsafe condition that occurs, the water heater control will detect this condition and
determine the appropriate action. The water heater control will display the information on the desktop in plain
text that accurately 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 continue 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 Diagnostic 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
tradesman in the field involved.
24
Servicing should only be performed by a Qualified Service Technician