Bryant 189BNV EVOLUTION Service Manual page 22

Flash
Type Amber LED Description
Code
HIGH PRESSURE LOCKOUT
System Mal-
84 (Elevated from fault code 31
function
when the stage (speed) can no
longer be lowered)
FAN INVERTER TEMP LOCK-
System
85
(Elevated from fault code 62 af-
Malfunction
ter 3 occurrences)
FAN INVERTER CURRENT
System
86
(Elevated from fault code 63 af-
Malfunction
ter 5 occurrences)
Reset
Time
FOR 4 HOURS
4 Hours
OUT
15 minutes
LOCKOUT
5 minutes
Mode Possible Causes
Outside Normal Operat-
ing Range (e.g. improp-
er load calculation, sys-
Both
tem match issue, out-
side cooling range, out-
side heating range etc.)
Service Valve left
Both
closed (Liquid or Vapor)
Loose High Pressure
Both
Switch harness leads
Pressure Switch dis-
Both connected from ODU
Control Board
Check Outdoor Coil for clogging (ice or debris)
and clean or de-ice if necessary; Troubleshoot
Outdoor Airflow too low
Outdoor fan motor and make sure it is working;
Cool
or off
Cool Overcharged System
Indoor Airflow too low or
Heat
off
follow Indoor Airflow troubleshooting instruction
Restriction due to de-
Both bris leading to Over-
charge when charging
Restriction in EXV plus
Long Line Application
Both leading to Overcharge
when charging in Cool-
ing mode
Non-condensable lead-
Both
ing to high load
Restriction in Filter Drier
plus Long Line Applica-
Cool
tion and filter drier on
Outdoor Unit
Restriction in EXV plus
Cool
Overcharge
Restriction in Circuits or
Cool
Tubing
Both Faulty Pressure Switch
Electric Heater plus If User Interface is not requesting Electric Heat
Heat Heat pump application:
Electric Heater stuck on
Furnace plus Heat
Heat pump application: Fur-
nace stuck on
Restriction in Filter Drier
plus Long Line Applica-
Heat
tion and filter drier on
Indoor Unit
Expansion Device Re-
Both
striction
Mode Ambient Range), if low add charge using
Heat Overcharged System
dures); if out side cooling charge mode range,
Reversing Valve Stuck
Heat
in Cooling
Unusual loading of the
fan
Both
Improper airflow across
inverter heat sink
Both Inverter damage
Sudden supply voltage
change
Both Sudden load change on
fan/motor
Inverter damage
22
Actions
Consult Application Guidelines
Ensure Service Valves are open
Check HPS harness
Check HPS connection on ODU control
follow Outdoor Airflow troubleshooting instruc-
tion
Check system charge using Cooling Charging
Mode (follow proper charging procedures)
Check Indoor for clogging (ice or debris) and
clean or de-ice if necessary; Troubleshoot In-
door fan motor and make sure it is working;
Clean System (refer to application guideline)
and replace filter drier
If long line, troubleshoot EXV
Clean System (refer to application guideline)
and replace filter drier
Clean System (refer to application guideline)
and replace filter drier
troubleshoot EXV
Check kinks and straighten or replace circuits
Check Discharge pressure with gauge, if less
than 600 +/- 20 psig and switch is open (mea-
sure resistance) then replace pressure switch
check for heater relays, if on troubleshoot
Electric Heater
If not in Defrost and Furnace is running same
time as heat pump, troubleshoot Furnace
Clean System (refer to application guideline)
and replace filter drier
Troubleshoot TXV
Troubleshoot EXV
Check charge in cooling (if in Cooling Charge
Charging Mode (follow proper charging proce-
pull out charge, weigh in using heating charge
mode
troubleshoot reversing valve
Troubleshoot outdoor fan motor & blade and
make sure they are working
Check for fan outlet blockage due to snow/ice
etc.
Inspect outdoor coil for obstructions
Replace inverter
Investigate incoming voltage
Troubleshoot outdoor fan motor & blade and
make sure they are working. Check harness
and connectors
Replace inverter