Troubleshooting 17
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
Summary of Contents for ANERU Series
Page 2: ......
Page 5: ......
Page 6: ...Contents 1 Precautions 2 2 Information servicing For flammable materials 3 Safety Precautions...
Page 12: ...Contents 1 Model Reference 2 2 External Appearance 3 Model Reference...
Page 15: ...Model Reference 4 2 2 Outdoor Unit Single Fan Outdoor Unit Double Fan Outdoor Unit...
Page 18: ...IDU Console 3 2 Dimensional Drawings 16 Drain pipe Hanging arm 195 700 600 210...
Page 21: ...IDU Console 6 6 Air Velocity and Temperature Distributions Discharge Angle 60...
Page 36: ...IDU Compact Cassette 4 2 Dimensional Drawings...
Page 38: ...IDU Compact Cassette 6 4 Service Place...
Page 56: ......
Page 115: ...IDU Super Slim Casstte 54 36k 42k 48k 55k...
Page 118: ......
Page 131: ...IDU Duct 7 6 Fan Performance 12K...
Page 132: ...IDU Duct 8 18K...
Page 133: ...IDU Duct 9 24K...
Page 134: ...IDU Duct 10 30K 36K...
Page 135: ...IDU Duct 11 42K 48K...
Page 136: ...IDU Duct 12 55K...
Page 165: ...IDU Duct 41 12k 18k 24k 30k...
Page 166: ...IDU Duct 42 36k 42k 48k 55k...
Page 178: ......
Page 179: ...35mm 1 38in...
Page 180: ......
Page 256: ...IDU Floor Ceiling 82 36k 48k 55k...
Page 259: ......
Page 267: ...Outdoor Unit 3 Panel Plate B30...
Page 268: ...Outdoor Unit 4 Panel Plate BA30...
Page 269: ...Outdoor Unit 5 Panel Plate CA30...
Page 270: ...Outdoor Unit 6 Panel Plate D30...
Page 271: ...Outdoor Unit 7 Panel Plate X230...
Page 272: ...Outdoor Unit 8 Panel Plate X330...
Page 273: ...Outdoor Unit 9 Panel Plate X430...
Page 274: ...Outdoor Unit 10 Panel Plate E30...
Page 275: ...Outdoor Unit 11 Panel Plate 590...
Page 276: ...Outdoor Unit 12 2 Service Place...
Page 285: ...Outdoor Unit 21 UO70Xo UO90Xo UO100Xo UO100Xo3F...
Page 286: ...Outdoor Unit 22 UO120Xo UO140Xo UO160Xo...
Page 291: ......
Page 292: ......
Page 293: ......
Page 294: ......
Page 295: ...Outdoor unit printed circuit board diagram 17122000044714 17122000048121 17122000046453...
Page 297: ...Outdoor unit printed circuit board diagram 17122000048064...
Page 299: ...Outdoor unit printed circuit board diagram 17122000047742 1 3 4 6 8 9 5 7 10 12 11 2 13...
Page 302: ...Outdoor unit printed circuit board diagram 17122000041841...
Page 304: ...Outdoor unit DC motor driver board diagram 17122000021912 5 6 1 2 3 4...
Page 320: ...3 IDU Installation Duct Connector Connector...
Page 352: ...Product Features 13 Remote LCD Screen Indicators...
Page 549: ......
Page 550: ......
Page 551: ......
Page 552: ...email info rotenso com www rotenso com INSTALLER STAMP...