Bryant 189BNV EVOLUTION Service Manual page 19

Flash
Type Amber LED Description
Code
55 Fault COIL TEMP SENSOR FAULT
OAT-OCT THERMISTOR OUT
56 Local
SUCTION PRESSURE
57 Fault
SENSOR FAULT
DISCHARGE TEMP OUT OF
RANGE EVENT
59 Local
(elevates to fault code 74 after
FAN INVERTER FAULT
61 Local (elevates to fault code 76 after
FAN INVERTER TEMP HIGH
62 Local (elevates to fault code 85 after
FAN INVERTER CURRENT
63 Local
(elevates to fault code 86 after
DC VOLTS LOW - SPEED
65 Local
OUTDOOR FAN DROPPED
66 Local
67 Local STATOR HEATER FAULT
10 MIN STAGE 2 WARMUP
68 Event
INVERTER/COMPRESSOR
System Mal- INTERNAL FAULT (elevates to
69
this fault code after 5 occur-
function
rences of itself)
COMPRESSOR DROPPED
71 Local
Reset
Time
NA
NA
OF RANGE
NA
15 Minutes
5 occurrences)
6 Minutes
5 occurrences)
NA
3 occurrences)
FAULT
6 Minutes
5 occurrences)
NA
LIMITING
6 Minutes
OUT
6 Minutes
10 Minutes
DELAY
15 Minutes
6 Minutes
OUT
Mode Possible Causes
Sensor Harness not
connected to AOC
control
Broken or loose
harness wire chart to check resistance at given temperature
Coil Thermistor not
Both
properly attached or in
wrong location
Broken or Damaged
Sensor chart to check resistance at given temperature
Hardware damage to
AOC control
Coil Thermistor not
properly attached or in
wrong location
Outdoor Ambient Tem-
Both
perature sensor improp-
erly installed (sensor
body may be in contact
with sheet metal)
Heating when cooling is
Cool
demanded
Sensor Harness not
connected to AOC
control
Broken or loose
harness wire
Compare transducer reading to gauge reading
Both
Electrical short
at service valve (see transducer measurement
destroyed Transducer
chart); Check system for electrical shorts and
electronics
Compare transducer reading to gauge reading
Heat damage during
at service valve (see transducer measurement
brazing
Both See fault 74
Both OFM failed to start
Fan motor misalignment
See Fault 76
Both See fault 85
Both See fault 86
Low supply line voltage
(< 197 VAC)
Loose wire in control
Both
box area
Inverter internal
damage
MOC is reporting that
Both
OFM isn't running
There is a demand for
Check compressor winding resistance or mis-
Both stator heat but MOC
doesn't detect it
High voltage power cy-
Both
cle
Phase imbalance/com-
Check compressor winding resistance or mis-
pressor or inverter-
miswire
Flooded start
Both
Incorrect refrigerant
charge
Inverter damage
Compressor damage
MOC is reporting that
Check compressor winding resistance or mis-
Both compressor isn't
running
19
Actions
Ensure plug is connected to AOC control
Check harness for continuity; see resistance
Ensure Sensor is properly clipped to the dis-
tributor entry-tube
Check harness for continuity; see resistance
Replace AOC control
Ensure Sensor is properly clipped to the dis-
tributor entry-tube
Properly install OAT sensor
Check fuse on AOC control
Check wiring between AOC and reversing
valve
troubleshoot reversing valve
Inspect outdoor coil for obstructions
Ensure plug is connected to AOC control
Check harness
correct; replace transducer
chart); replace transducer
Same actions for 74
Troubleshoot outdoor fan motor & blade and
make sure they are working
System will attempt to run again
Same actions for 76
Same actions for 85
Same actions for 86
Check supply voltage to ODU; if low contact
utility provider
Loose wire: check for loose wire in ODU
Replace Inverter
Troubleshoot outdoor fan motor and make
sure it is working
wire of compressor leads at terminals U,V,W
No action
wire of compressor leads at terminals U,V,W
Troubleshoot EXV & TXV
Check refrigerant amount
Replace inverter
Replace compressor
wire of compressor leads at terminals U,V,W