Carrier Infinity 25VNA8 - Page 23

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