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
Type
Slave
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
