Goodman ComfortNet DSXC160241AC, Service Instructions Manual

Page: 57 / 108

SERVICING
57
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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 Integrated control
module diagnostic/status
LED display shows the
indicated code.
s#OMFORT.ET˜THERMOSTAT
displays ‘---‘ in the
temperature display area.
",!.+ A 2 s Outdoor air
temp sensor
fault AIR
3%.3/2
FLT
A2 s Shorted sensor.
s
Open sensor.
s Sensor
disconnected.
s Sensor out of
range.
s Check sensor
connection.
s Replace open/
shorted sensor.
s Turn power OFF prior
to repair.
s Replace with correct
replacement part.
s Heat pump fails to operate
in heating mode.
s Integrated control
module diagnostic/status
LED display shows the
indicated code.
s#OMFORT.ET˜THERMOSTAT
displays error message.
",!.+ A 3 s Outdoor coil
temp sensor
fault COIL
3%.3/2
FLT
A3 s Shorted sensor
s Open sensor.
s Sensor.
disconnected.
s Sensor out of
range.
s Check sensor
connection.
s Replace open/
shorted sensor.
s Turn power OFF prior
to repair.
s Replace with correct
replacement part.
s Air conditioner/heat pump
fails to operate.
s Integrated control
module diagnostic/status
LED display shows the
indicated code.
",!.+ E 5 s Open fuse ",/7.
FUSE
E5 s Short in low
voltage wiring. s Locate and
correct short
in low voltage
wiring. s Turn power OFF prior
to repair.
s Replace fuse with
3-amp automotive type.
s Air conditioner/heat pump
fails to operate.
s Integrated control
module diagnostic/status
LED display shows the
indicated code.
",!.+ E E s Board mis-
operation ).4%2.!,
FAULT
EE s Compressor
relay contacts
welded. s Replace control. s Turn power OFF prior
to repair
s Replace with correct
replacement part.
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.
",!.+ b 0 s Circulator
blower motor
is not running
when it
should be
running. MOTOR
./425.
b0 s Indoor blower
motor problem.
s
Communications
error between
indoor and
outdoor unit.
s Check indoor
blower motor.
s
Check indoor
blower motor
wiring.
s Check indoor unit
control.
s Repair/ replace
any faulty wiring.
s Repair/ replace
indoor blower
motor or control.
s Turn power OFF prior
to repair.
s
Applies only to fully
communicating system
USING#OMFORT.ET˜
thermostat.
s
Replace with correct
replacement part.
s
Air conditioner/heat
pump operates at reduced
performance.
s Air conditioner/heat pump
operating at low stage
when expected to operate
at high stage.
s Integrated control
module diagnostic/status
LED display shows the
indicated code.
",!.+
b 9
s
Airflow is
lower than
demanded LOW ID
AIRFLOW
b9
s
Indoor blower
motor problem
s
Blocked filters.
s Restrictive/
undersized
ductwork
s Indoor/ outdoor
unit miss-match.
s
Check indoor
blower motor.
s
Check filters;
clean/replace as
needed.
s Check ductwork;
resize as needed.
s Verify indoor and
outdoor units are
properly matched.
s
Turn power OFF prior
to repair.
s
Applies only to fully
communicating system
USING#OMFORT.ET˜
thermostat.
s Replace with correct
replacement part. See
specification sheet(s)
for airflow requirements
and maximum external
static pressure.
s See specification
sheets for approved
system matches.
3934%-42/5",%3(//4).'
PCBHR104