Service Handbook - AO Smith Water Heaters

Status Icons
The Status Icons are displayed on the Desktop Screen and convey operational and diagnostic information.
The icons are described in the table below.
Table 5
Icon
Description
Water temperature in the tank has fallen. Shaded area of the animated thermometer icon will rise and fall in response to
water temperature in the storage tank as sensed from the Temperature Probe(s).
Water temperature in the tank has reached the Operating Set Point. The Control System enters the Standby operating state.
The control is unable to initiate a heating cycle. This will happen whenever a Fault condition is detected by the Control
System or when the Enable/Disable circuit is an open circuit.
The Combustion Blower is being energized.
The Blower Prover pressure switch contacts have closed. The check mark icon is visual confirmation of contact closure.
The Igniter is being energized.
The Igniter has been energized and the Control System has sensed the required minimum Igniter current. The check mark
icon is visual confirmation of minimum Igniter current.
OFF
The 24 Volt Gas Valve is being energized.
GAS
O
N
The Control System has sensed flame at the Burner from the Flame Sensor.
The Control System has declared a Fault condition and must be inspected/serviced by a Qualified Service Agent. Fault
message details can be viewed in the Current Fault menu. Heating operation is disabled (Control System lock out) until the
condition that caused the Fault is corrected. Power to the water heater must be cycled off and on to reset the Control System.
Note: Cycling power will not reset the Control System if the condition that caused the Fault has not been corrected.
The Control System has declared an Alert condition and must be inspected/serviced by a Qualified Service Agent. The water
heater will continue to operate during an Alert condition.
Servicing should only be performed by a Qualified Service Agent
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