51
er priority fault is not also present
(in which case the higher priority
fault is displayed) (see fault code
priority list).
c. If no furnace shared data is avail-
able on either the memory card or
the network, the fault code “d1”
(NO SHARED DATA) is displayed
at the communicating thermostat
active fault screen and at the fur-
nace seven-segment displays
provided a higher priority fault is
not also present (in which case
the higher priority fault is dis-
played) (see fault code priority
list). The homeowner is alerted
via the communicating thermostat
(level 2 fault). Furnace shared
data on the network will not be
written or re-written from the
memory card.
REPLACING THE FURNACE
CONTROL
In the event that the furnace control
must be replaced, the memory card
must be detached from the original fur-
nace control and retained with the fur-
nace. Failure to save and connect the
memory card properly to the replace-
ment control may result in no operation
or undesired operation of the furnace.
and/or
III. does not match the horsepower
of the attached motor (“d6”-
BLWR HP CNFLCT),
and/or
IV. does not support the motor
manufacturer of the motor pre-
sent (“d7” - BLWR MFG
CNFLCT),
and/or
V. is from an older furnace and is
missing critical newer furnace
shared data (“d8” - OLD
SHARED DATA),
furnace shared data from the
network (if valid) is used to con-
trol the furnace (see description
of “network” under “If no mem-
ory card present” (item 1
above). Furnace shared data
on the network will not be writ-
ten or re-written from the mem-
ory card. If the furnace shared
data on the network is valid, the
appropriate fault for the memo-
ry card will be displayed at the
active fault screen of the com-
municating thermostat and at
the furnace seven-segment dis-
plays when in standby mode
only (see fault code priority list).
The homeowner will not be
alerted (level 1 fault).
b. If neither the furnace shared data
on the memory card is valid nor
the furnace shared data on the
network is valid, the fault code sta-
tus is elevated. The homeowner is
alerted via the communicating
thermostat (level 2 fault) and the
fault code d1 (NO VALID SHARED
DATA) is displayed at the commu-
nicating thermostat active fault
screen and at the furnace seven-
segment displays provided a high-
When replacing the furnace control,
be sure to match the dipswitch set-
tings of the original control on the
replacement.
DO NOT CUT THE PLASTIC WIRE
TIE USED AS A TETHER TO THE
ATTACHED MEMORY CARD.
DOING SO WILL DEFEAT THE
PURPOSE OF RETAINING THE
MEMORY CARD – WHICH COULD
LEAD TO A LOSS OF CRITICAL
DATA NECESSARY TO OPERATE
THE FURNACE. THE CARD MUST
STAY WITH THE FURNACE –
EVEN WHEN THE FURNACE CON-
TROL (IFC) MUST BE REPLACED.
NEVER USE A CONTROL BOARD
TAKEN FROM ANOTHER FUR-
NACE AS A REPLACEMENT CON-
TROL FOR THIS FURNACE.
FURNACE CONTROLS TAKEN
FROM OTHER FURNACES MAY
CONTAMINATE THE NETWORK
WITH THE WRONG SHARED DATA
WHICH CAN ONLY BE FIXED BY
REPLACING THE MEMORY CARD
WITH THE ORIGINAL MEMORY
CARD FROM YOUR FURNACE OR
A REPLACEMENT MEMORY
CARD DESIGNED FOR YOUR
FURNACE.
For communicatinig systems as a
final confirmation of the correct
shared data the model number
should be verified by checking the
furnace user menu under the sub
menu titled “Unit Info.” Make sure
that the model number displayed in
the menu matches the model num-
ber on the rating label. (NOTE: Wild
cards will be shown in parenthesis.
Example: RGFG-06(E/N)MCKS.)
