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TABLE 19 (continued)
R97V FAULT CODES WITH DESCRIPTIONS AND SOLUTIONS
'*"*#$&$$H5)2$)2$&$+.+I4*)-)4&:$9&3:-6$$H51$93*+&41$()::$.01*&-1$)+$,&2$51&-$/.'12$=3-$,&2$51&-$9)*)+,$*&-1$'1/&+'2$9*./$-51$-51*/.2-&-$
=1-(11+$FMP$&+'$QFP$()::$.01*&-1$&-$RMP$)+2-1&'6
-%$./+0*+(,&$$H5)2$9&3:-$)+')4&-12$-5&-$-51$/)'$0*1223*1$2()-45$)2$1:14-*)4&::?$4:.21'$(51+$)-$25.3:'$=1$.01+6
120%.*%34(0%/"*+(,K$$N&2$51&-)+,$()::$0*.411'$&2$+.*/&:$1O410-$9)*)+,$*&-12$=1-(11+$FMP$&+'$QFP$()::$=1$9)O1'$-.$RMP$=?$-51$
93*+&41$4.+-*.:6
!"#$%&
DJ
!"#$%&'$()*)+,$-.$/)'$0*1223*1$2()-456
!7#$%&'$/)'$0*1223*1$2()-456
!8#$%&'$93*+&41$4.+-*.:6
'()#*+(,&
!"#$;514<$()*)+,$&+'$4.+++14-).+2$=1-(11+$/)'$0*1223*1$2()-45$&+'$93*+&41$4.+-*.:6$$;.**14->*10:&41$&2$+14122&*?6
!7#$@10:&41$/)'$0*12223*1$2()-456
!8#$@10:&41$A3*+&41$4.+-*.:6
STATUS: This is a non-critical fault experienced by the furnace. All operations (including thermostat calls) should continue as
normal with no perceivable difference in operation.
DESCRIPTION: The blower motor is operating at the highest rpm or torque that specifications allow but the application requires
more torque or speed in order to get the desired airflow under the current static pressure conditions. The motor will continue to
operate because internal software will prevent operation above the permitted range. However, a fault is sent to the furnace
control (or I.F.C.) from the motor.
not be displayed after the first three minutes of blower operation after power reset. Further, this fault will not be logged in the
fault buffer or fault history after the first hour of operation and will only be logged into the fault buffer a maximum of one time.
This code (66) indication is intended as a tool to notify the installer of inadequate airflow due to excessive static pressure in the
duct of the system. The code is not intended to be a fault code. It is merely an operating indicator.
66
EXPECTED OPERATION: All (including thermostat) operation should continue as normal. Blower operation may be slightly
compromised but will continue.
CAUSE:
(1) The blower has hit the maximum speed or torque limit specified by the manufacturer because the static pressure is too high.
SOLUTION:
(1) The static pressure is too high because the ductwork is improperly designed or is restricted for some other reason or the
filter needs cleaning or replacing. Remove the obstruction or repair the duct so that static pressure does not exceed published
values in the specification sheets or installation instructions for the furnace.
'*"*#$&$$H5)2$)2$&$+.+I4*)-)4&:$9&3:-6$$H51$93*+&41$()::$.01*&-1$)+$,&2$51&-$/.'12$=3-$,&2$51&-$9)*)+,$*&-1$'1/&+'2$9*./$-51$-51*/.2-&-$
=1-(11+$FMP$&+'$QFP$()::$.01*&-1$&-$RMP$)+2-1&'6
-%$./+0*+(,&$$H5)2$9&3:-$)+')4&-12$-5&-$-51$/)'$0*1223*1$2()-45$)2$1:14-*)4&::?$.01+$(51+$)-$25.3:'$=1$4:.21'6
120%.*%34(0%/"*+(,K$$N&2$51&-)+,$()::$0*.411'$&2$+.*/&:$1O410-$9)*)+,$*&-12$=1-(11+$FMP$&+'$QFP$()::$=1$9)O1'$-.$RMP$=?$-51$
93*+&41$4.+-*.:6
!"#$%&
!"#$B)+'$,32-26
!7#$C/0*.01*$D1+-)+,6
D=
!8#$%&'$()*)+,$-.$/)'$0*1223*1$2()-456
!E#$%&'$/)'$0*1223*1$2()-456
!F#$%&'$93*+&41$4.+-*.:6
'()#*+(,&
!"#$;514<$D1+-)+,$)2$01*$-5)2$)+2-*34-).+$=..<6$$;.**14-$)9$+.-$*),5-6$$B&)-$9.*$()+'$4.+')-).+$-.$4:1&*6
!7#$;.**14-$D1+-)+,$&+'$/&<1$23*1$:1+,5-2$&+'$4.+2-*34-).+$4./0:?$()-5$-5)2$)+2-*34-).+$=..<6
!8#$;514<$()*)+,$&+'$4.+++14-).+2$=1-(11+$/)'$0*1223*1$2()-45$&+'$93*+&41$4.+-*.:6$$;.**14->*10:&41$&2$+14122&*?6
!E#$@10:&41$/)'$0*12223*1$2()-456
!F#$@10:&41$A3*+&41$4.+-*.:6
E5-4F81''7814'G5<!H4!;?'1-I4'H?7;-4B14?F16
BLOWER CUTBACK
E5-4F81''7814'G5<!H4?F16I4'H?7;-4B14!;?'1-
Note: This fault will
103
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