Rheem 96v series Installation Instructions Manual page 119

TABLE 20 (continued)
R96V FAULT CODES WITH DESCRIPTIONS AND SOLUTIONS
STATUS: This is a critical fault experienced by the furnace. The furnace will not operate in gas heat modes but all other modes
(e.g. cooling) should function if a call is present.
DESCRIPTION: The IFC has detected current flowing from pin(s) 1 and/or 2 of connector P4 of the furnace control. The IFC
looks for current flow from these pins to determine if water is present in the collector box. When water is present, the sensor will
pass a small amount of electrical current to the sheet metal of the furance. This current flow will notify the IFC that water is
present.
Note: The condition must be present continuously for at least ten seconds before the IFC will declare the fault.
EXPECTED OPERATION: No gas heating operation can proceed and the fault is displayed. All other modes (e.g. cooling) of
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operation should operate as normal.
CAUSE:
(1) A blocked condensate drain or the drain trap has become blocked and cannot allow condensate water to flow properly.
(2) Wiring to the sensors has been damaged and exposed wiring is touching the furnace sheet metal.
(3) Water sensor has been removed from the collector box with wires still attached and the metal probe is touching the sheet
metal portion of the furnace.
SOLUTION:
(1) Remove/Repair drain blockage.
(2) Replace/Repair wiring between IFC and both sensors.
(3) Return sensor(s) to proper location in the collector box.
STATUS: This is a non-critical fault experienced by the furnace. All operations (including thermostat calls) should continue as
normal with no perceivable difference in operation.
DESCRIPTION: A blower fault which is non-critical allows the blower to continue to run but at less-than-optimal conditions.
EXPECTED OPERATION: All (including thermostat) operation should continue as normal. Blower operation may be slightly
compromised but will continue.
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CAUSE:
(1) The blower has hit the maximum speed or torque limit specified by the manufacturer or is running at the temperature limit
because the static pressure is too high.
SOLUTION:
(1) The static pressure is too high because the ductwork is improperly designed or is restricted for some other reason or the
filter needs cleaning or replacing. Remove the obstruction or repair the duct so that static pressure does not exceed published
values in the specification sheets or installation instructions.
STATUS: This is a critical fault. The furnace will not operate in any mode.
DESCRIPTION: The blower has failed critically or there is a critical motor fault - such as thermal limit trip that prevents the
blower motor from running.
EXPECTED OPERATION: If the furnace was in heating operation when this fault occurred, blower operation will immediately
stop and the furnace will shut down normally with post-purge at the correct speed. After the post purge (or immediately if no
heat call was present), no other operation (including thermostat calls) will occur until this fault is cleared.
This fault may be displayed in heating or cooling modes and may also be displayed in heating mode after the main limit control
has been opened four times consecutively for more than 150 seconds (2m:30sec) each time. If this happens, the IFC
determines that the motor and/or blower is not functional and enters a hard lockout condition requiring repair of the blower/motor
and manual reset of power to the furnace.
CAUSE:
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(1) The motor has tripped on thermal limit because of a restriction or bearing failure.
(2) The motor Power Factor Correction (P.F.C.) choke is faulty and needs replacing.
(3) The furnace model data is faulty or corrupted.
(4) Wiring to the motor and/or P.F.C. has become compromised.
(5) The blower wheel has become damaged or is not properly attached to the motor shaft.
(6) The motor has failed catastrophically.
SOLUTION:
(1) Remove obstruction or replace motor.
(2) Replace the Power Factor Correction choke.
(3) Replace the furnace memory card with the correct replacement part from ProStock.
(4) Inspect and replace or repair wiring and/or connectors to the motor and/or P.F.C. as necessary.
(5) Replace the blower wheel and/or attach the blower wheel to the motor shaft properly.
(6) Replace the motor.
WATER SENSED
BLOWER FAULT - BLOWER CAN STILL RUN
BLOWER FAULT - MOTOR CANNOT RUN
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