Bryant 189BNV EVOLUTION Service Manual page 23

Flash
Type Amber LED Description
Code
COMPRESSOR / INVERTER
System Mal-
88
(Elevated from fault code 79 af-
function
ter 5 occurrences)
INVERTER VDC-OUT OVER
VOLTAGE EVENT
91 Local
(Elevates to fault code 97
after 5 occurrences)
INVERTER VDC-OUT UNDER
VOLTAGE EVENT (Elevates
92 Local
to fault code 96 after 5 occur-
230VAC UNDER VOLTAGE
93 Local
230VAC OVER VOLTAGE
94 Local
COMPRESSOR OVER CUR-
System
RENT LOCKOUT
95
Malfunction (Elevated from fault code 49 af-
ter 5 occurrences)
VDC UNDER VOLTAGE
System
96
Malfunction
(Elevated from fault code 92 af-
ter 5 occurrences)
VDC OVER VOLTAGE LOCK-
System
97
(Elevated from fault code 91 af-
Malfunction
ter 5 occurrences)
HIGH TORQUE EVENT
(Event will cause stage down
and when stage is at lowest
98 Local
level, will elevate to fault code
HIGH TORQUE LOCKOUT
System
(Elevated from fault code 98
99
Malfunction
when 98 occurs at lowest
Reset
Time
LOCKOUT
2 Hours
5 Minutes
5 Minutes
rences)
5 Minutes
EVENT
5 Minutes
EVENT
2 Hours
LOCKOUT
2 Hours
OUT
2 Hours
NA
99)
2 hours
stage)
Mode Possible Causes
Blocked Inverter Heat Check Inverter fins for debris and clean if nec-
Exchanger (fins)
Condenser Airflow too cooling) for clogging (ice or debris) and clean if
necessary; Troubleshoot Condenser fan motor
low or off
Both
Evaporator Airflow too heating) for clogging (ice or debris) and clean if
low or off necessary; Troubleshoot Evaporator fan motor
High Load conditions at
cold ambient heating or
high ambient cooling
Inverter damage
Occurs when bus volt-
age exceeds 410 VDC
Both Compressor is
suddenly unloaded
Inverter damage
Occurs when bus volt-
Both age falls below 220
persistent over voltage rips will lead to fault 96
VDC
Occurs when incoming
Both voltage is less than 197 (possibly caused by weather event) and self-
VAC
Occurs when incoming
Both voltage is more than (possibly caused by weather event) and self-
253 VAC
Both High superheat
Compressor is operat-
Both ing outside the allowed
operational envelope
Incoming power
supply voltage
Loose or incorrect wire Check incoming power leads and leads to the
connections
Check compressor winding resistance or mis-
Phase imbalance
Both
Outdoor Airflow too low
and clean if necessary; Troubleshoot ODU fan
or off
Refrigerant overcharge
Inverter damage
Compressor internal
damage
Low supply line voltage
(< 197 VAC)
Loose wire in control
Both
box area
Inverter internal
damage
High supply line voltage Check supply voltage to ODU; if high contact
(> 253 VAC)
Both
Inverter internal
damage
Compressor is operat-
Both ing outside the allowed
operational envelope
Both Refer to 99
Both Miswire
Refrigerant
Both
overcharge
Outdoor Airflow too low
Both and clean if necessary; Troubleshoot ODU fan
or off
Expansion Device
Both
Restriction
23
Actions
essary
Check Condenser (IDU in heating, ODU in
and make sure it is working
Check Evaporator (IDU in cooling, ODU in
and make sure it is working
Over charge: Check system charge
Replace inverter
Check operation of compressor; persistent
over voltage trips will lead to fault 97
Check that the service valves are fully open
Replace inverter
Check for interruption in main power supply;
System will try to ride through voltage spikes
recover in trip condition
System will try to ride through voltage spikes
recover in trip condition
Troubleshoot TXV
Troubleshoot EXV
Check suction pressure transducer and suc-
tion temperature sensor
Inverter will reduce speed to a lower stage
Check voltage versus unit rating plate for al-
lowable range
compressor plug
wire of compressor leads at terminals U,V,W
Check ODU coil for clogging (ice or debris)
motor and make sure it is working
Check refrigerant amount
Replace inverter
Replace compressor
Check supply voltage to ODU; if low contact
utility provider
Loose wire: check for loose wire in ODU
Replace Inverter
utility provider
Replace Inverter
Inverter will reduce speed to a lower stage
Refer to 99
Check miswire of compressor leads at termi-
nals U,V,W
Check refrigerant amount
Check ODU coil for clogging (ice or debris)
motor and make sure it is working
Troubleshoot TXV
Troubleshoot EXV