35 65-0315—02
Stack Limit Status
Table 53 shows the status page data for the control Stack
Limit.
The bar graph displayed for this status is the stack sensor
temperature.
Lead Lag Slave Status
Table 54 shows the status page data for Lead Lag Slave.
Lead Lag Master Status
Table 55 shows the status page data for Lead Lag Master.
R7910 OR R7911 DIAGNOSTICS
The diagnostic page displays analog and digital I/O status of
the control. The digital I/O data is displayed as LEDs that are
either on (green) or off (gray) (see Fig. 77). Not all digital I/O
can be displayed at the same time on the page, so a
horizontal scroll bar is used to move the view left and right to
show all digital I/O data.
Fig. 77. Diagnostic digital I/O page.
Temperature sensors or pressure sensors also display the
current sensor state, (i.e., whether there is a fault condition or
the sensor is in a normal monitoring state). The user can
toggle between displaying the control digital and analog I/O
(the initial display is the digital I/O). The Digital or Analog
button on the bottom of the diagnostic page changes the I/O
displayed to the type indicated by the button.
The data displayed on the control diagnostics page is listed in
Table 56 and Table 57.
Table 53. Stack Limit Status.
Data Comment
Stack limit enable Enabled or Disabled
Stack limit Temp setting between -40 °F to 266 °F
(-40 °C to 130 °C)
Stack limit setpoint Temp setting between -40 °F to 266 °F
(-40 °C to 130 °C)
Stack sensor state None, Normal, Open, Shorted,
Outside high range, Outside low
range, Not reliable (None=no stack
temp sensor)
Stack temperature Stack sensor temperature (same as
bar graph)
Table 54. Lead Lag Slave.
Data Comment
Typ e Sl ave
Command Received Yes/No
Demand Off
Request Rate RPM
Burner Control Standby
Modulating No
Priority
Table 55. Lead Lag Master.
Data Comment
Master enabled Enabled
Status normal
Demand source Lead lag slave
Active Service None
Off setpoint 160 °F (71 °C)
Setpoint 150 °F (66 °C)
On setpoint 145 °F (63 °C)
operating
temperature
150 °F (66 °C)
Sensor state normal
Sensor temperature 150 °F (66 °C)
Slave firing no
Stager state idle
Stager timer
CH demand
CH frost demand no
DHW frost demand no
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