Carrier Infinity 25VNA8 - Page 20

20
Flash Code ActionsPo ssible CausesMode
Reset
Time
Amber LED DescriptionTy pe
53 Fault
OUTDOOR AIR TEMP SEN-
SOR FAULT
NA Both
Sensor Harness not
connected to AOC
control
Ensure plug is connected to AOC control
Broken or loose har-
ness wire
Check harness for continuity; see resis-
tance chart to check resistance at given
temperature
Broken or Damaged
Sensor
Check harness for continuity; see resis-
tance chart to check resistance at given
temperature
Hardware damage to
AOC control
Replace AOC control
54 Fault
SUCTION TEMP SENSOR
FAULT
NA Both
Sensor Harness not
connected to AOC
control
Ensure plug is connected to AOC control
Broken or loose har-
ness wire
Check harness for continuity; see resis-
tance chart to check resistance at given
temperature
Suction Thermistor
not properly at-
tached or in wrong
location
Ensure Sensor is properly attached to the
accumulator entry ---tube
Broken or Damaged
Sensor
Check harness for continuity; see resis-
tance chart to check resistance at given
temperature
Hardware damage to
AOC control
Replace AOC control
55 Fault
COIL TEMP SENSOR
FAULT
NA Both
Sensor Harness not
connected to AOC
control
Ensure plug is connected to AOC control
Broken or loose har-
ness wire
Check harness for continuity; see resis-
tance chart to check resistance at given
temperature
Coil Thermistor not
properly attached or
in wrong location
Ensure Sensor is properly clipped to the
distributor entry ---tube
Broken or Damaged
Sensor
Check harness for continuity; see resis-
tance chart to check resistance at given
temperature
Hardware damage to
AOC control
Replace AOC control
56 Event
OA T---OCT THERMISTOR
OUT OF RANGE
NA
Cool
Heating wh en cool-
ing is demanded
Check fuse on AOC control
Check wiring between AOC and reversing
valve
troubleshoot reversing valve
Inspect ou tdoor coil for obstructions
Both
Coil Thermistor not
properly attached or
in wrong location
Ensure Sensor is properly clipped to the
distributor entry ---tube
Outdoor Ambient
Temper atu re sen sor
improperly installed
(sensor body may
be in contact with
sheet metal)
Properly install OAT sensor
57 Fault
SUCTION PRE SSURE
SENSOR FAULT
NA Both
Sensor Harness not
connected to AOC
control
Ensure plug is connected to AOC control
Broken or loose har-
ness wire
Check harn ess
Electrical short de-
stroyed Transducer
electronics
Compare transducer reading to gauge
reading at service valve (see transducer
measurement chart); Check system for
electrical shorts and correct; replace trans-
ducer
Heat damage during
brazing
Compare transducer reading to gauge
reading at service valve (see transducer
measurement chart); replace transducer