95
TABLE 19
R97V FAULT CODES WITH DESCRIPTIONS AND SOLUTIONS
Key
FAULT CODES
FAULT CODES
DISPLAYED TEXT
DESCRIPTION
FAULT CODE
DISPLAYED
AT DUAL
SEVEN-
SEGMENT
DISPLAY OF
CONTROL
NO MODEL DATA
DESCRIPTION:
This code is displayed anytime there is no model data at the furnace. The model data is electronically
stored data that is used to define (among other things) blower operation. Without the model data, the furnace
cannot function. Note that model data may be available even if there is no card attached to the furnace control.
A missing memory card will display fault code "d4" if model data is available on the network.
SOLUTION
SOLUTION:
Replace the missing model data card into the connector labeled P6 on the furnace control (I.F.C.). If the original
d6
HORSEPOWER CONFLICT ON MODEL DATA CARD
DESCRIPTION:
The horsepower reported by the motor does not match the horsepower stored in memory in the model data of
the model data card. However, the model data stored on the microprocessor of the furance control does match the attached
CAUSE:
There are two possible causes for this fault: (1) The blower motor has recently been replaced and the wrong
horspower motor was used. (2) The model data card or furnace control has recently been replaced and the wrong card or
replacement control was used.
SOLUTION:
Determine the correct motor and/or model data card for the furnace and replace the incorrect or damaged part with
a new, correct part.
Never replace the model data card of a furnace with a model data card from another furnace or
component (e.g. condenser or air handler). Doing so could result in improper operation of the blower which may cause
damage to the heat exchanger. If the original model data card for the furnace control is available and working, it must
A correct replacement model data card can be ordered from ProStock. Be sure to have the furnace model and serial
number available when ordering.
STATUS:
This is a non-critical fault. The furnace should operate in any mode.
d4
NO VALID MODEL DATA ON MODEL DATA CARD
DESCRIPTION:
The model data card inserted into the slot at position P6 of the furnace control is corrupt and can not be used
microprocessor.
CAUSE:
This fault is displayed when there is no information on the model data card (blank), the card is not present or the
SOLUTION:
Remove the model data card and replace with the
original
memory card from the furnace or the
correct
replace-
CAUSE:
Typically, the model data card will be missing from the furnace. In most cases, the cause of this fault will be the loss
d1
STATUS:
This is a non-critical fault. The furnace should operate in any mode.
CAUSE
STATUS
STATUS:
This is a critical fault. The furnace will not operate in any mode.
EXPECTED OPERATION
EXPECTED OPERATION:
No operation (including thermostat) will be permitted without the model data. The model data
defines the IBM (Indoor Blower Motor) speed-torque curve. Without this information, the IBM can not operate. Refer to the
section of this manual titled "INTEGRATED FURNACE CONTROL" under the subsection titled "MODEL DATA CARD" for
EXPECTED OPERATION:
Model data from the model data card cannot be used because it is invalid or not present at all.
Operation should proceed as normal with this fault (d4) only being displayed during the standby mode.
EXPECTED OPERATION:
Model data from the model data card cannot be used because it is invalid. Operation should
details on the hierarchy of use of multiple copies of model data and distribution (among other details) of model data.
or disconnection of the original model data card from the furnace control (or I.F.C.). When the furnace control (or I.F.C.) is
replaced, the model data card must be saved and installed in the replacement control.
card can not be found, a replacement card can be ordered from ProStock. Be sure to order the correct model data card for the
furnace. Note: Furnace power must be cycled off and then on again after replacing the card or the model data will not be read.
OR there is no model data card installed at all. However, a valid copy of model data for the furnace still resides in the furnace
model data card has corrupted and cannot be properly read.
Never replace the model data card of a furnace with a model data card from another furnace or
ment memory card.
component (e.g. condenser or air handler). Doing so could result in improper operation of the blower which may cause d
damage to the heat exchanger. If the original model data card for the furnace control is available and working, it must
EHXVHG
A correct replacement memory card can be ordered from ProStock. Be sure to have the furnace model and serial numb
number available when ordering.
motor.
proceed as normal with this fault (d6) only being displayed during the standby mode.
be used.
Dia
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