GSZC16 Installation

18
TROUBLESHOOTING INFORMATION: UNITARY DIAGNOSTIC CODES
5.)4!29$)!'./34)##/$%3
3YMPTOMSOF
!BNORMAL/PERATION
,EGACY#OMFORT.ET
4HERMOSTAT
$IAGNOSTIC3TATUS
,%$$ISPLAY#ODES &AULT
$ESCRIPTION
#OMFORT.ET
4-

4HERMOSTAT/NLY 0OSSIBLE
#AUSES
#ORRECTIVE
!CTIONS
.OTES
#AUTIONS
$IGIT $IGIT $IGIT -ESSAGE #ODE
s Air conditioner/heat pump
fails to operate.
sIntegrated control module
diagnostic/status LED
display shows the indicated
code.
s#OMFORT.ETTHERMOSTAT
displays error message.
",!.+ d3sConfiguration
Mis-match
).6!,)$
#/.&)'
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
/.-EMORYCARDMAY
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.ETTHERMOSTAT
displays error message.
",!.+ d4s 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
/.-EMORYCARDMAY
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.
",!.+ 01s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.
",!.+ 01s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).