Lochinvar Power-Fin 502 Installation & Operation Manual page 60

8
Operating information
By using the Previous/Next (, ) arrow keys on the SMART SYSTEM display panel, you can navigate through the nine (9)
display screens. Each screen will contain two (2) viewable items. The following is a description of the individual items and what
they can display:
Screen
#3
Press the Next  arrow key on the SMART SYSTEM display to access Screen #4.
#4
Press the Next  arrow key on the SMART SYSTEM display to access Screen #5.
#5
Press the Next  arrow key on the SMART SYSTEM display to access Screen #6.
#6
Press the Next  arrow key on the SMART SYSTEM display to access Screen #7.
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Status Display Screens
Display shows:
If the system sensor has not been selected as the control sensor, only the
SYS: ***F
system temperature will be displayed.
When the system sensor has been selected as the control sensor, the
***F (***) control will display the system temperature as well as the set point in
parenthesis.
Open The control does not detect the system sensor.
Shorted The system sensor wires or the sensor itself has become grounded.
The control will display the outdoor air temperature as sensed by the
OUTDOOR: ***F
outdoor air sensor.
Open The control does not detect the outdoor air sensor.
Shorted The outdoor air sensor wires or the sensor itself has become grounded.
The control will display the system return temperature if the system
SYSRT: *** return sensor is connected. If not connected, the display will skip this
screen and display screen #5.
The control will display the position of the 3-way valve; 100% indicates
VALVE: ***%
that no outlet water is being bypassed into the inlet.
FLUE: ***F The control will display the flue temperature.
Open The control does not detect the flue sensor.
Shorted The flue sensor wires or the sensor itself has become grounded.
TANK: ***F The control will display the temperature.
Open The control does not detect the auxiliary sensor.
Shorted The auxiliary sensor wires or the sensor itself has become grounded.
FAN SPD: ****RPM The control will display the actual fan motor RPM.
FLAME SIG: **.*uA The control will display the flame signal in dc microamps.
Installation & Operation Manual
(cont'd)
Description