Replacing The Furnace Control - Rheem RGPE series Installation Instructions Manual

3. If t t w w o o m m e e m m o o r r y y c c a a r r d d s s p p r r e e s s e e n n t t –
(attached to IFC a a n n d d inserted in J15
of IFC), the memory card inserted
into J15 "wins" and its furnace shared
data is used and written to the net-
work (if valid) unless:
a. If no furnace shared data is pre-
sent on the memory card inserted
in J15, the furnace shared data
from the attached memory card is
used and the rules for o o n n e e m m e e m m o o - -
r r y y c c a a r r d d p p r r e e s s e e n n t t (outlined in 2
above) are used. A fault code is
not displayed anywhere unless
warranted for the attached memo-
ry card per the rules outlined for
o o n n e e m m e e m m o o r r y y c c a a r r d d p p r r e e s s e e n n t t .
Furnace shared data is not written
to the network unless the furnace
shared data on the attached mem-
ory card is valid.
b. If furnace shared data on the
memory card inserted in J15 is
corrupt ("d4" – MEM CARD
INVALID), the furnace shared data
from the attached memory card is
used and the rules for o o n n e e m m e e m m o o - -
r r y y c c a a r r d d p p r r e e s s e e n n t t (outlined in 2
above) are used. A fault code is
not displayed anywhere unless
warranted for the attached memo-
ry card per the rules outlined for
o o n n e e m m e e m m o o r r y y c c a a r r d d p p r r e e s s e e n n t t .
Furnace shared data is not written
to the network unless the furnace
shared data on the attached mem-
ory card is valid.
c. If furnace shared data on the
inserted memory card is a motor
mismatch ("d6" - BLWR HP
CNFLCT), the furnace shared data
from the attached memory card is
used and the rules for o o n n e e m m e e m m o o - -
r r y y c c a a r r d d p p r r e e s s e e n n t t (outlined in 2
above) are used. A fault code is
not displayed anywhere unless
warranted for the attached memo-
ry card per the rules outlined for
o o n n e e m m e e m m o o r r y y c c a a r r d d p p r r e e s s e e n n t t .
Furnace shared data is not written
to the network unless the furnace
shared data on the attached mem-
ory card is valid.
d. If furnace shared data on the
inserted memory card does not
support the motor manufacturer of
the motor present ("d7" - BLWR
MFG CNFLCT), the furnace
shared data from the attached
memory card is used and the
rules for o o n n e e m m e e m m o o r r y y c c a a r r d d p p r r e e - -
s s e e n n t t (outlined in 2 above) are
used. A fault code is not dis-
played anywhere unless warrant-
ed for the attached memory card
per the rules outlined for o o n n e e
m m e e m m o o r r y y c c a a r r d d p p r r e e s s e e n n t t . Furnace
shared data is not written to the
network unless the furnace
shared data on the attached
memory card is valid.
e. If furnace shared data on the
inserted memory card is from an
older furnace and is missing criti-
cal newer furnace shared data
("d8" – OLD SHARED DATA), the
furnace shared data from the
attached memory card is used
and the rules for o o n n e e m m e e m m o o r r y y
c c a a r r d d p p r r e e s s e e n n t t (outlined in 2
above) are used. A fault code is
not displayed anywhere unless
warranted for the attached memo-
ry card per the rules outlined for
o o n n e e m m e e m m o o r r y y c c a a r r d d p p r r e e s s e e n n t t .
Furnace shared data is not writ-
ten to the network unless the fur-
nace shared data on the attached
memory card is valid.
4. Furnace shared data is never written
to any memory card (attached or
inserted) in the field. There is no
way to write to a memory card in the
field. If a new memory card is need-
ed, it must be ordered from Pro-
Stock parts replacements.
REPLACING THE FURNACE
CONTROL
In the event that the furnace control
must be replaced, the memory card
must be broken away (detached)
from the original furnace control and
retained with the furnace. A plastic
tether with a note wrapped around
the tether is used to remind the
technician not to remove the card
from the furnace. The card can be
broken away easily by putting pres-
sure on the control board at dip-
switch bank SW-3 with the left hand
and pulling forward on the upper
right-hand corner of the card with
the furnace control still in place on
the control board mounting plate
(see Figure 32). The card will break
free from the furnace control. Use
this card to insert into the memory
card connector labeled J15 of the
replacement control board. Failure
to save and connect the memory
card properly to the replacement
control may result in no operation or
undesired operation of the furnace.
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, BREAK-AWAY MEMO-
RY CARD. DOING SO WILL
DEFEAT THE PURPOSE OF
RETAINING THE MEMORY CARD
– WHICH COULD LEAD TO A
LOSS OF CRITICAL DATA NECES-
SARY TO OPERATE THE FUR-
NACE. THE CARD MUST STAY
WITH THE FURNACE – EVEN
WHEN THE FURNACE CONTROL
(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.
41