Installation Manual
17
TROUBLESHOOTING INFORMATION: UNITARY DIAGNOSTIC CODES
5.)4!29$)!'./34)##/$%3
3YMPTOMSOF
!BNORMAL/PERATION
,EGACY#OMFORT.ET
4HERMOSTAT
$IAGNOSTIC3TATUS
,%$$ISPLAY#ODES &AULT
$ESCRIPTION
#OMFORT.ET
4-
4HERMOSTAT/NLY 0OSSIBLE
#AUSES
#ORRECTIVE
!CTIONS
.OTES
#AUTIONS
$IGIT $IGIT $IGIT -ESSAGE #ODE
sAir conditioner/heat pump
fails to operate.
sIntegrated control
module diagnostic/status
LED display shows the
indicated code.
s#OMFORT.ETTHERMOSTAT
displays error message.
",!.+ d0sData not yet
ON.ETWORK
./.%4
DATA
d0 sAir conditioner/
heat pump is
wired as part of
a communicating
system and
integrated control
module does
not contain any
shared data.
sVerify
system type
(communicating
or legacy)
sPopulate shared
data using
memory card
sWire system as
legacy system
sTurn power OFF prior
to repair.
sUse memory card for
your specific model.
sInsert memory card
BEFORE turning power
/.-EMORYCARDMAY
be removed after data
is loaded. Turn power
OFF before removing
memory card.
sError code will
be cleared once
data is loaded.
Applies only to fully
communicating system
USING#OMFORT.ET
thermostat.
sAir conditioner/heat pump
fails to operate.
sIntegrated control
module diagnostic/status
LED display shows the
indicated code.
s#OMFORT.ETTHERMOSTAT
displays error message.
",!.+ d1sInvalid Data
ON.ETWORK
).6!,)$
DATA
d1 s Air conditioner/
heat pump is
wired as part of
a communicating
system and
integrated control
module contains
invalid shared
data or network
data is invalid for
the integrated
control module.
sVerify
system type
(communicating
or legacy).
sPopulate correct
shared data using
memory card.
sWire system as
legacy system.
sTurn power OFF prior
to repair.
sUse memory card for
your specific model.
sInsert memory card
BEFORE turning power
/.-EMORYCARDMAY
be removed after data
is loaded. Turn power
OFF before removing
memory card.
sError code will
be cleared once
data is loaded.
Applies only to fully
communicating system
USING#OMFORT.ET
thermostat.
sAir conditioner/heat pump
fails to operate.
sAir conditioner/heat pump
operating at reduced
performance.
sAir conditioner/heat pump
operating at low stage
when expected to operate
at high stage.
sIntegrated control
module diagnostic/status
LED display shows the
indicated code.
s#OMFORT.ETTHERMOSTAT
displays error message.
",!.+ d2s System
Mis-Match
).6!,)$
SYSTEM
d2 sAir conditioner/
heat pump is
wired as part of
a communicating
system and
outdoor unit
requires airflow
greater than
indoor unit’s
airflow capability.
sShared data is
incompatible
with the system
or missing
parameters.
sVerify system type
(communicating
or legacy).
sVerify shared
data is correct
for your specific
model; re-
populate data if
required.
sWire system as
legacy system.
sTurn power OFF prior
to repair.
sUse memory card for
your specific model.
sInsert memory card
BEFORE turning power
/.-EMORYCARDMAY
be removed after data
is loaded. Turn power
OFF before removing
memory card.
sError code will
be cleared once
data is loaded.
Applies only to fully
communicating system
USING#OMFORT.ET
thermostat.