SERVICING
54
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
$IGIT
-ESSAGE
#ODE
s
Air conditioner/heat pump
fails to operate.
s
Integrated control module
diagnostic/status LED
display shows the indicated
code.
s#OMFORT.ETTHERMOSTAT
displays error message.
",!.+
d
3
s
Configuration
Mis-match
).6!,)$
#/.&)'
d3
s
Shared data sent
to integrated
control module
does not match
hardware
configuration.
s
Verify
system type
(communicating
or legacy).
s
Verify shared
data is correct
for your specific
model; re-
populate data if
required.
s
Wire system as
legacy system.
s
Turn power OFF prior
to repair.
s
Use memory card for
your specific model.
s
Insert memory card
BEFORE turning power
/.-EMORYCARDMAY
be removed after data
is loaded. Turn power
OFF before removing
memory card.
s
Error code will
be cleared once
data is loaded.
Applies only to fully
communicating system
USING#OMFORT.ET
thermostat.
s
Air conditioner/heat pump
fails to operate.
s
Integrated control
module diagnostic/status
LED display shows the
indicated code.
s#OMFORT.ETTHERMOSTAT
displays error message.
",!.+
d
4
s
Invalid
Memory
Card Data
).6!,)$
MC DATA
d4
s
Shared data on
memory card has
been rejected.
s
Verify
system type
(communicating
or legacy).
s
Verify shared
data is correct
for your specific
model; re-
populate data if
required.
s
Wire system as
legacy system.
s
Turn power OFF prior
to repair.
s
Use memory card for
your specific model.
s
Insert memory card
BEFORE turning power
/.-EMORYCARDMAY
be removed after data
is loaded. Turn power
OFF before removing
memory card.
s
Error code will be
cleared once data is
loaded.
s
Very long run time.
s
Four consecutive
compressor protector
trips with average run
time between trips greater
than 3 hours.
s
Compressor operating at
high speed and outdoor fan
operating at low speed
s
Integrated control
module diagnostic/status
LED display shows the
indicated code.
",!.+
0
1
s
Low Side
Fault
LOW SIDE
FAULT
01
s
Low refrigerant
charge.
s
Restriction in
liquid line.
s
Indoor blower
motor failure.
s
Indoor
thermostat set
extremely low.
s
Verify refrigerant
charge; adjust as
needed.
s
Check for
restricted liquid
line; repair/
replace as
needed.
s
Check indoor
blower motor;
repair/replace as
needed.
s
Check indoor
thermostat setting.
s
Turn power OFF prior
to repair.
s
Fault will clear after 30
consecutive normal
cycles.
s
Fault may be cleared
by cycling 24VAC to
control.
s
Replace with correct
replacement part(s).
s
Compressor and outdoor
fan are off.
s
Thermostat demand is
present.
s
Integrated control
module diagnostic/status
LED display shows the
indicated code.
",!.+
0
1
s
Low Pressure
Cut Out Trip
,03/0%.
01
s
Low refrigerant
charge.
s
Restriction in
liquid line.
s
Indoor blower
motor failure.
s
Indoor
thermostat set
extremely low.
s
Verify refrigerant
charge; adjust as
needed.
s
Check for
restricted liquid
line; repair/
replace as
needed.
s
Check indoor
blower motor;
repair/replace as
needed.
s
Check low
pressure switch;
repair/replace as
needed.
s
Check indoor
thermostat setting.
s
Turn power OFF prior
to repair.
s
Replace with correct
replacement part(s).
PCBHR104