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12.4
STATUS DISPLAY SCREENS
Status Display Screens
By using the Previous/Next (◄, ►) arrow keys on the SMART SYSTEM display panel, you can navigate through the six (6)
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
Display shows:
Description
1
WHR: OFF
The unit has been turned OFF by the Enter/Reset button on the SMART
SYSTEM display panel.
STANDBY
The unit has not received a call for heat from a tank thermostat nor has it
received a call for heat from a tank sensor.
SET POINT MET
The unit has met the water temperature set point, but is still receiving a call
for heat from either a tank sensor or a tank thermostat.
PREPURGE
The unit has initiated a 10 second purge period on a call for heat.
IGNITION
The unit has begun a 5 second spark period to ignite the main burner.
RUN***% RATE
The unit has fired and is running at the displayed percentage.
POSTPURGE
The call for heat has been satisfied and the unit runs the fan for an
additional 10 seconds to clear the combustion chamber and vent system of
residual flue products.
SERVICE
The unit has been placed in a temporary mode that will allow the unit to fire
at 100% of rate for the purpose of combustion analysis.
OUT:***.*C
The outlet temperature is displayed.
OPEN
The control does not detect the outlet sensor.
SHORTED
The outlet sensor wires or the sensor itself has become shorted.
Press the Next ► arrow key on the SMART SYSTEM display to access Screen 2
2
IN: ***.*C
If a tank sensor is installed, only the inlet temperature will be displayed.
***.*C (***)
When a tank thermostat is installed, the control will display the inlet
temperature as well as the set point in brackets.
OPEN
The control does not detect the inlet sensor
SHORTED
The inlet sensor wires or the sensor itself has become shorted.
RISE: ***.*C
The difference between the inlet temperature and the outlet temperature.
Press the Next ► arrow key on the SMART SYSTEM display to access Screen 3.
3
FLUE: ***.*C
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: ***.*C (***)
The control will display the tank temperature; if used, the set point appears
in brackets.
OPEN
The control does not detect the tank sensor.
SHORTED
The tank sensor wires or the sensor itself has become shorted.
Press the Next ► arrow key on the SMART SYSTEM display to access Screen 4.
4
FAN SPD: ****RPM
The control will display the actual fan motor RPM.
FLAME SIG: **.*UA
The control will display the flame signal in dc micro amps.
Press the Next ► arrow key on the SMART SYSTEM display to access Screen 5.
5
WHR CFH: OFF
The control has not received a call for heat from a tank thermostat or tank
sensor.
ON
The control has received a call for heat from a tank thermostat or tank
sensor.
WHR PUMP: OFF
The control has not received a DHW call for heat and has not powered the
primary pump.
ON
The control has received a DHW call for heat and has powered the primary
pump.
DELAY
The primary call for heat has been satisfied and the DHW pump is running
for a fixed time to remove any residual heat.
Press the Next ► arrow key on the SMART SYSTEM display to access Screen 6.
6
NOT USED: N/A
Not used.
0-10V IN: **.VDC
The control will display a 0-10Vdc signal received from a Building
Management System (BMS) connected to the unit.
Press the Next ► arrow key on the SMART SYSTEM display to access Screen 7.
