Carrier Infinity 25VNA8 - Fault Code Actions and Troubleshooting Steps

19
Table 6—Fault Code Actions
Flash Code Ty pe Amber LED Description
Reset
Time
Mode Po ssible Causes Actions
ON, no flash Standby
1, pause Variable Capacity
Normal Operation
for communicating
system
1(2secON),
longer pause
(1 secon d
OFF)
Variable Capacity (Range
Cutback)
Speed L imiting for
communicating sys-
tems
1, pause 2 --- s t a g e ” L o w ” C a p a c ity
Low capacity for
non--- communicat-
ing
2, pause 2---stage ”High” Capacity
High capacity for
non--- communicat-
ing
4, pause
2---stage ”Reduced” Capac-
ity
Speed L imiting for
non--- communicat-
ing systems
25
System
Malfunction
INVALID MODEL PLUG/IN-
VERTER SIZE
NA Both
Missing model plug Install the correct model plug
Wrong Model Plug
Installed
Verify correct model plug installed
Damaged Model
Plug
Check model plug for corrosion or break-
age; replace if necessary. Check Model
Plug resistance per the wiring diagram
Model Plug not fully
engaged on board
Align per the silkscreen layout
Incorrect Model Plug
with Inver ter Size
Replaceplugorinverterwithcorrectsize
(If model plug is for 2 Ton but Inverter is 3
Ton, fault code 25 will be shown)
Damaged AOC con-
trol
Replace AOC control
31 Fault
HIGH PRESSURE SWITCH
OPEN
(Stage down for each oc-
currence, elevates to fault
code 84 when it occurs
while running on the lowest
stage. Reduced capacity is
cleared when system has
been continuously running
at any stage for 2 hou rs
with reduced capacity.)
6 Minutes
(then re-
duced
stage op-
eration)
Both Refer to fault code 84
32 Local
LOW PRESSURE TRIP
(Elevates to fault code 83
after 3 occurrences)
6 Minutes Both Refer to fault code 83
33 Local
LOST INVERTER COMMU-
NICATIONS
(Occurs aftr 2 minutes of no
communications between
AOC and MOC)
(Elevates to fault code 48
after 3 consecutive failures
within 20 minute or 20 min-
utes continuous loss of
connection)
NA Both Refer to fault code 48
46 Local BROWNOUT EVENT 6 Minutes Both
Low line voltages
Check for line voltage approximately
greater than180V. If voltage less than 180V
and if persistent contact power provider
Bad connection on
L1 and L2
Check for connection on line and load
side to verify connection is good.
Inverter not reading
proper voltage
Verify no action issue from the above list
then replace inverter.
48
System
Malfunction
LOST INVERTER COMMU-
NICATIONS
(Elevated from fault code
33 after 3 occurrences)
NA Both
Loose or disconnect-
ed harness (Hard-
ness between AOC
(PL20) and MOC)
Verify good harness connection
Radio or Electrical
noise
System will try to self ---mitigate with repeat-
ed start attempts
Possible damage to
inverter
change out the Inverter drive
49 Local
COMPRESSOR OVER
CURRENT FAULT
(Elevates to fault code 95
after 5 occurrences)
6 Minutes Both Refer to fault code 95