Rheem 97MDV060 Series Installation Instructions Manual Download

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104

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TABLE 19 (continued)

R97V FAULT CODES WITH DESCRIPTIONS AND SOLUTIONS

DESCRIPTION:

The furnace control (I.F.C.) can not communicate with the blower motor.

SOLUTION:

(1) Check wiring, connectors and terminals - repair or replace as necessary.

(4) The motor has failed catastrophically.

INTERNAL CONTROL FAULT DETECTED

STATUS:

This is a critical fault. The furnace will not operate in any mode of operation.

DESCRIPTION:

This is a severe fault that should rarely (if ever) be discovered in the field. It is an indicator of an internal

microprocessor fault on the furnace control (or I.F.C.) or voltage applied to the main gas valve solenoid when there should be
none.

(1) Check for miswiring in the furnace.
(2) Replace the furnace control (or I.F.C.).

SOLUTION:

(2) Furnace control software test failure - failed furnace control (or I.F.C.).

(2) There is no line voltage to the motor.
(3) The furnace model data is faulty or corrupted.

REMOTE FAULTS RESET PERFORMED

This is a notification that fault codes in the fault buffer have been reset.

NO BLOWER COMMUNICATIONS

STATUS:

This is a critical fault. The furnace will not operate in any mode.

(1) 24VAC or similar voltage applied to the main gas valve solenoid circuit unexpectedly.

CAUSE:

EXPECTED OPERATION:

If possible, if the furnace was in heating operation when this fault occurred, the gas valve will

immediately close (flame will be lost), IBM (Indoor Blower Motor) operation will immediately stop and the furnace will shut down
normally (except without IBM operation) with IDM (Induced Draft Motor) 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.
However, this fault may also indicate an internal microprocessor failure.  This may mean that the heat call will not end as
expected and that all outputs will be de-energized and gas valve closed immediately when the fault is sensed.

(2) Check line voltage wiring, connectors and terminals to the Power Factor Correction choke and ECM motor. Repair and
replace as necessary.
(3) Replace the furnace memory card with the correct replacement part from ProStock.
(4) Replace the motor.

CAUSE:

(1) The wires between the blower motor have been disconnected or there is a poor connection.

EXPECTED OPERATION:

If the furnace was in heating operation when this fault occurred, the gas valve will immediately close

(flame will be lost), IBM (Indoor Blower Motor) operation will immediately stop and the furnace will shut down normally (except
without IBM operation) with IDM (Induced Draft Motor) 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.

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