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Flash Code
Type
Amber LED Description
COMPRESSOR/INVERTER
79
Local
(Elevates to fault code 88
SUCTION OVER TEMP
System
82
(Elevated from fault code
Malfunction
72 after 3 occurrences)
LOW PRESSURE LOCK-
System
83
Malfunction
(Elevated from fault code
32 after 3 occurrences)
Reset
Time
FAULT
6 Minutes
after 5 occurrences)
LOCKOUT
4 Hours
OUT FOR 4 HOURS
4 Hours
Mode
Possible Causes
Compressor fails to
System will try to self ---mitigate with repeat-
start
Both
Refer to fault code 88
Undercharged Sys-
Cool
tem
Uninsulated vapor
Cool
line
Indoor TXV opera-
Cool
tion
Check charge in heating mode per heating
Undercharged Sys-
Heat
match then pull out charge, weigh in using
tem
Outdoor EXV opera-
Heat
tion
Reversing valve by-
Both
pass
Service Valve left
Cool
closed (Liquid or Va-
por)
Undercharged Sys-
Cool
tem
Indoor Airflow too
bleshoot Indoor fan motor and make sure
Cool
low or off
Restriction in Circuits
Cool
or Tubing
Heat
EXV Malfunction
Service Valve left
Heat
closed (Liquid Ser-
vice Valve)
Check Outdoor for clogging (ice or debris)
Outdoor Airflow too
Heat
low or off
Check charge in heating mode per heating
Undercharged Sys-
Heat
match then pull out charge, weigh in using
tem
Restriction in Filter
Both
Drier
Expansion Device
Both
bleshoot TXV (see guide below); replace if
Restriction
23
Actions
ed start attempts
Check system subcooling to determine
charge status, if low add charge using
Charging Mode (follow proper charging
procedures)
Insulate the vapor line
Troubleshoot TXV
check charge chart. If pressures do not
heating charge method
Troubleshoot EXV
Troubleshoot reversing valve
Ensure Service Valves are open
Check system subcooling to determine
charge status, if low add charge using
Charging Mode (follow proper charging
procedures)
Check Indoor for clogging (ice or debris)
and clean or de ---ice if necessary; Trou-
it is working; follow Indoor Airflow trou-
bleshooting instruction
Repair restriction
Troubleshoot EXV (see guide below)
Ensure Liquid Service Valve is open
and clean or de ---ice if necessary; Trou-
bleshoot Outdoor fan motor and make
sure it is working; follow Outdoor Airflow
troubleshooting instruction
check charge chart. If pressures do not
heating charge method
Check for temperature drop across filter
drier and replace if necessary
If short lineset (less than 15 ft.) Trou-
necessary
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