Troubleshooting 16
2.Field Maintenance
Possible causes of trouble
Co
m
pr
esso
r st
uc
k
Sh
ort
ag
e o
f re
fri
ge
ra
nt
Re
st
ric
te
d l
iq
ui
d l
in
e
Di
rt
y a
ir f
ilt
er
Di
rt
y e
va
por
at
or
c
oi
l
Ins
uf
fic
ie
nt
a
ir t
hr
oug
h e
va
po
ra
to
r c
oi
l
O
ve
rc
ha
rg
e o
f re
fri
ge
ra
nt
Di
rt
y o
r pa
rt
ia
lly
bl
oc
ke
d c
onde
ns
er
Ai
r o
r i
nc
om
pr
es
sib
le
g
as
in
re
fr
ig
er
an
t c
yc
le
Sho
rt
c
yc
ling
o
f c
onde
ns
ing
a
ir
Hi
gh t
em
pe
ra
tur
e c
onde
ns
ing
m
edi
um
Ins
uf
fic
ie
nt
c
onde
ns
ing
m
edi
um
Br
ok
en c
om
pr
es
so
r i
nt
er
na
l pa
rt
s
In
ef
fic
ie
nt
c
om
pr
es
so
r
Ex
pa
ns
io
n v
al
ve
o
bs
tr
uc
te
d
Ex
pa
ns
io
n v
al
ve
o
r c
ap
ill
ar
y t
ub
e c
lo
se
d c
om
pl
et
el
y
Le
ak
in
g p
ow
er
e
le
m
en
t o
n ex
pa
ns
io
n v
al
ve
Po
or
in
st
al
la
tio
n o
f f
ee
le
r b
ul
b
He
av
y l
oa
d c
on
di
tio
n
Lo
os
en ho
ld do
w
n bo
lts
a
nd /
o
r s
cr
ew
s
Shi
ppi
ng
pl
at
es
re
m
ai
n a
tta
che
d
Poor
c
hoi
ce
s of
c
ap
ac
ity
Co
nt
ac
t o
f pi
pi
ng
w
ith o
the
r pi
pi
ng
o
r e
xt
er
na
l pl
at
e
Unit will not start
Compressor will not start but fans run
☆
Compressor and condenser (outdoor) fan will not
start
Evaporator (indoor) fan will not start
Condenser (Outdoor) fan will not start
Unit runs, but shortly stops
☆ ☆
☆ ☆
☆ ☆
Compressor short-cycles due to overload
☆
☆ ☆
High discharge pressure
☆ ☆ ☆ ☆ ☆ ☆
Low discharge pressure
☆
☆
High suction pressure
☆
☆
☆ ☆
Low suction pressure
☆ ☆ ☆ ☆ ☆
☆ ☆ ☆
Unit runs continuously but insufficient cooling
☆ ☆ ☆ ☆ ☆
☆ ☆ ☆
☆
☆
☆
Too cool
Compressor is noisy
☆
☆
☆ ☆
☆
Horizontal louver can not revolve
Test method / remedy
Re
pl
ac
e t
he c
om
pr
es
so
r
Le
ak
te
st
Re
pl
ac
e r
es
tr
ic
ted
p
ar
t
Cl
ea
n o
r r
ep
la
ce
Cl
ea
n c
oi
l
Ch
ec
k f
an
Cha
ng
e c
ha
rg
ed r
ef
rig
er
ant
v
ol
um
e
Cl
ea
n c
on
den
ser
o
r r
em
ov
e o
bs
ta
cl
e
Pur
ge
, e
va
cua
te
a
nd r
ec
ha
rg
e
Re
m
ov
e ob
st
ru
ct
ion
to a
ir f
low
Re
m
ov
e ob
st
ru
ct
ion
in
a
ir or
w
at
er
fl
ow
Re
m
ov
e ob
st
ru
ct
ion
in
a
ir or
w
at
er
fl
ow
Re
pl
ac
e c
om
pr
es
so
r
Tes
t c
om
pr
es
so
r e
ffi
ci
en
cy
Re
pl
ac
e v
al
ve
Re
pl
ac
e v
al
ve
Re
pl
ac
e v
al
ve
Fi
x f
eel
er
b
ul
b
Ch
ec
k h
ea
t l
oa
d
Ti
ght
en bo
lts
o
r s
cr
ew
s
Re
m
ov
e t
he
m
Cho
os
e A
C o
f l
ag
er
c
apa
ci
ty
o
r a
dd t
he
num
be
r o
f A
C
Re
ct
ify
pi
pi
ng
so
a
s no
t t
o c
ont
ac
t e
ac
h o
the
r o
r w
ith e
xt
er
na
l
pl
ate
Refrigerant Circuit
Others
Содержание U6MRS32-18
Страница 1: ...SERVICE MANUAL ENGLISH AIR CONDITIONING SYSTEMS LCAC...
Страница 4: ......
Страница 5: ...Contents 1 Precautions 2 2 Information servicing For flammable materials 3 Safety Precautions...
Страница 11: ...Contents 1 Model Reference 2 2 External Appearance 3 Model Reference...
Страница 13: ...Model Reference 3 2 External Appearance 2 1 Indoor Unit Compact Four way Cassette A6 Duct Floor Ceiling...
Страница 14: ...Model Reference 4 2 2 Outdoor Unit Outdoor Unit...
Страница 18: ...IDU Compact Cassette 4 2 Dimensional Drawings...
Страница 20: ...IDU Compact Cassette 6 4 Service Place...
Страница 23: ...IDU Compact Cassette 9 Heating airflow velocity distributions Heating temperature distributions...
Страница 25: ...IDU Compact Cassette 11 Heating airflow velocity distributions Heating temperature distributions...
Страница 49: ...IDU A6 Duct 8 6 Fan Performance 18K...
Страница 50: ...IDU A6 Duct 9 Constant air volume...
Страница 67: ...IDU Floor Ceiling 4 3 Part names Air inlet Display panel Air outlet grille Louver Installation part...
Страница 68: ...IDU Floor Ceiling 5 4 Service Place 35mm 1 38in 1m 3 28ft 35mm 1 38in 35mm 1 38ch...
Страница 93: ...Outdoor Unit 3 Panel Plate B30...
Страница 94: ...Outdoor Unit 4 Panel Plate BA30...
Страница 95: ...Outdoor Unit 5 Panel Plate CA30...
Страница 96: ...Outdoor Unit 6 Panel Plate D30...
Страница 97: ...Outdoor Unit 7 Panel Plate E30...
Страница 98: ...Outdoor Unit 8 Panel Plate 590...
Страница 99: ...Outdoor Unit 9 2 Service Place...
Страница 110: ...Wiring Diagrams Outdoor unit wiring diagram 16022000022493...
Страница 111: ...Outdoor unit printed circuit board diagram 17122000002718...
Страница 280: ...AIR CONDITIONING SYSTEMS LCAC Scan here to download the latest version of this manual...