15
TROUBLESHOOTING INFORMATION: UNITARY DIAGNOSTIC CODES
• A ir co nditio ner/heat pump fails
to o perate.
• Integrated co ntro l mo dule
diagno stic/status LED display
sho ws the indicated co de.
B LA NK
d
0
• Data no t yet o n
Netwo rk
• A ir co nditio ner/
heat pump is wired
as part o f a
co mmunicating
system and
integrated co ntro l
mo dule do es
no t co ntain any
shared data.
• Verify system type
(co mmunicating o r
legacy)
• P o pulate shared data
using memo ry card
• Wire system as
legacy system
• Turn po wer OFF prio r to
repair.
• Use memo ry card fo r yo ur
specific mo del.
• Insert memo ry card
B EFORE turning po wer ON.
M emo ry card may be remo ved
after data is lo aded. Turn
po wer OFF befo re remo ving
memo ry card.
• Erro r co de will be cleared
o nce data is lo aded.
• A ir co nditio ner/heat pump fails
to o perate.
• Integrated co ntro l mo dule
diagno stic/status LED display
sho ws the indicated co de.
B LA NK
d
1
• Invalid Data o n
Netwo rk
• A ir co nditio ner/
heat pump is wired
as part o f a
co mmunicating
system and
integrated co ntro l
mo dule co ntains
invalid shared data
o r netwo rk data is
invalid fo r
the integrated
co ntro l mo dule.
• Verify system type
(co mmunicating o r
legacy).
• P o pulate co rrect
shared data using
memo ry card.
• Wire system as
legacy system.
• Turn po wer OFF prio r to
repair.
• Use memo ry card fo r yo ur
specific mo del.
• Insert memo ry card
B EFORE turning po wer ON.
M emo ry card may be remo ved
after data is lo aded. Turn
po wer OFF befo re remo ving
memo ry card.
• Erro r co de will be cleared
o nce data is lo aded.
• A ir co nditio ner/heat pump fails
to o perate.
• A ir co nditio ner/heat pump
o perating at reduced
perfo rmance.
• A ir co nditio ner/heat pump
o perating at lo w stage when e
peeled to o perate at high stage.
• Integrated co ntro l mo dule
diagno stic/status LED display
sho ws the indicated co de.
B LA NK
d
2
• System
M is-M atch
• A ir co nditio ner/
heat pump is wired
as part o f a
co mmunicating
system and
o utdo o r unit
requires air flo w
greater than indo o r
units
airflo w capability.
• Shared data is
inco mpatible with
the system o r
missing
parameters.
• Verify system type
(co mmunicating o r
legacy).
• Verify shared data is
co rrect fo r yo ur
specific mo del
repo pulate data if
required.
• Wire system as
legacy system.
• Turn po wer OFF prio r to
repair.
• Use memo ry card fo r yo ur
specific mo del.
• Insert memo ry card
B EFORE turning po wer ON.
M emo ry card may be remo ved
after data is lo aded. Turn
po wer OFF befo re remo ving
memo ry card.
• Erro r co de will be cleared
o nce data is lo aded.
UNITARY DIAGNOSTIC CODES
D ia gno s t ic / S t a t us
LE D D is pla y C o de s
P o s s ible
C a us e s
C o rre c t iv e
A c t io ns
N o t e s & C a ut io ns
S ym pt o m s o f
A bno rm a l O pe ra t io n
( Le ga c y & C o m f o rt N e t ™
T he rm o s t a t )
D igit 3
D igit 2
D igit 1
F a ult
D e s c ript io n
