A.O. Smith BTH 120 Series, Руководство по обслуживанию

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Servicing should only be performed by a Qualified Service Technician
The table of status icons describes graphically operational details of the water heater. Below is a legend of
all the status icons:
Status Icon Description
The temperature of the water in the tank has fallen and the water
heater will now initialize a new heating cycle.
The temperature of the water in the tank has reached the Operating
Set Point .
The control is unable to initiate any further heating cycles. This is
usually caused by a fault condition detected by the control, but can
also occur when an external system (like an energy management
system) has asked the water heater to discontinue any further heat
cycles.
The blower is being energized.
The blower pressure switch has been made.
The igniter has been energized.
The igniter has been energized and sufficient current for ignition has
been detected.
The control has requested that the gas control valve be turned on.
The control has sensed flame in the burner.
The control has detected a fault condition. A fault condition will cause
the water heater to discontinue operation.
The control has detected a warning condition. These conditions will
not cause the water heater to discontinue further heating cycles, but
does merit attention.