Rheem RGFG Installation Instructions Manual page 57

FIGURE 44
DIPSWITCH BANK S2 TERMINATION AND BIAS SELECTIONS
SW4
BIAS / TERMINATION
These dipswitches will not be used for
first generation controls. They are
designed to be used for future genera-
tions of ClimateTalk which may support
multiple networks. For current installa-
tions, all three of the dipswitches in
bank SW4 must be in the "ON" posi-
tion. If not, the system may not be
able to communicate.
DUAL SEVEN-SEGMENT
DIAGNOSTIC DISPLAY
The dual seven-segment diagnostic dis-
play will either display the status of the
system (e.g. "H" for Heat) or a diagnos-
tic error code in the event of an active
fault. Fault and status codes and their
meanings can be determined from Table
19. For detailed information for each
fault code refer to the TROU-
BLESHOOTING section of this manual.
For communicating systems, the fault
code and a description can be found in
the thermostat "Active Fault" display
area. (See the section of this document
titled "ACTIVE FAULT DISPLAY" under
COMMUNICATING SYSTEMS for more
information).
The rightmost decimal on the display
will blink one time for every 100 CFM of
expected airflow whenever the blower is
operating. If the value is actually less
than 50 CFM above any increment of
100, the value will be rounded to the
lesser 100 value and the lesser value
will be displayed. For example, if the
actual CFM is 1049, the decimal will
blink ten times. If the actual CFM value
is 1051, the decimal will blink eleven
times. For better resolution, a service
tool or communicating thermostat is
required and the expected CFM can be
determined within a resolution of 10
CFM. (See the section of this manual
titled "USER MENUS" under "STATUS
1" or "STATUS 2" submenu "BLOWER
CFM").
FAULT CODE BUFFER
Upon power reset, the last five fault
codes from the furnace will be dis-
played on the seven-segment display.
These will be displayed in chronological
order from newest (displayed first) to
oldest (displayed last).
For communicating systems, the fault
code buffer can also be read at the
communicating thermostat inside the
furnace User Menus. The most recent
six fault codes are stored. Also dis-
played is the number of days since
each fault code was recorded.
NOTE: The following fault codes will
not be stored back-to-back in the fault
buffer. These will only be stored in the
buffer if the previous fault stored was a
different fault. 82, 11, 45, 46 & 57.
CLEARING DIAGNOSTIC
FAULT CODES FROM
THE BUFFER
To clear the fault codes in the fault
buffer, push and hold down the
"Fault Recall" button for 3 seconds.
When this is done, the right-most
seven-segment display will energize
the upper and lower horizontal seg-
ments for four seconds as confirma-
tion that the fault codes have been
cleared from the buffer. Be sure to
return the switch to the original posi-
tion after clearing the faults.
Faults can also be cleared at the
furnace User menu under the Fault
Hist selection. The seven-segment
displays will again operate as
described above.
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