Fault Codes With Descriptions And Solutions - Rheem *96V series Installation Instructions Manual

TABLE 20
R96V FAULT CODES WITH DESCRIPTIONS AND SOLUTIONS
Key
FAULT CODE
DISPLAYED
AT DUAL
SEVEN-
SEGMENT
DISPLAY OF
CONTROL
FAULT CODES
STATUS: This is a critical fault. The furnace will not operate in any mode.
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.
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
d1
section of this manual titled "INTEGRATED FURNACE CONTROL" under the subsection titled "MEMORY CARD" for details on
the hierarchy of use of multiple copies of model data and distribution (among other details) of model data.
CAUSE: Typically, the memory card will be missing from the furnace. In most cases, the cause of this fault will be the loss or
disconnection of the original memory card from the furnace control (or I.F.C.). When the furnace control (or I.F.C.) is replaced,
the memory card must be saved and installed in the replacement control.
SOLUTION: Replace the missing memory card into the connector labeled P6 on the furnace control (I.F.C.). If the original card
can not be found, a replacement card can be ordered from ProStock. Be sure to order the correct memory 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.
STATUS: This is a non-critical fault. The furnace should operate in any mode.
DESCRIPTION: The memory card inserted into the slot at position P6 of the furnace control is corrupt and can not be used OR
there is no memory card installed at all. However, a valid copy of model data for the furnace still resides in the furnace
microprocessor.
EXPECTED OPERATION: model data from the memory card can not 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.
d4
CAUSE: This fault is displayed when there is no information on the memory card (blank), the card is not present or the memory
card has corrupted and can not be properly read.
SOLUTION: Remove the memory card and replace with the original memory card from the furnace or the correct replacement
memory card. Never replace the memory card of a furnace with a memory 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 memory card for the furnace control is available and working, it must be used. A correct
replacement memory 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.
DESCRIPTION: The horsepower reported by the motor does not match the horsepower stored in memory in the model data of
the memory card. However, the model data stored on the microprocessor of the furance control does match the attached motor.
EXPECTED OPERATION: model data from the memory card can not be used because it is invalid. Operation should proceed
as normal with this fault (d6) only being displayed during the standby mode.
CAUSE: There are two possible causes for this fault: (1) The blower motor has recently been replaced and the wrong
d6
horspower motor was used. (2) The memory 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 memory card of a furnace with a memory 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 memory card for the furnace control is available and working, it must be
used. A correct replacement memory card can be ordered from ProStock. Be sure to have the furnace model and serial
number available when ordering.
FAULT CODES
DISPLAYED TEXT
STATUS
DESCRIPTION
EXPECTED OPERATION
CAUSE
SOLUTION
NO MODEL DATA
NO VALID MODEL DATA ON MEMORY CARD
HORSEPOWER CONFLICT ON MEMORY CARD
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