Hokkaido 4 Series, Руководство по обслуживанию

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Series 4 Models: “Wall” Type Top Class R32 Refrigerant AC
2.Field Maintenance
Possible causes of trouble
Po
w
er
fa
ilu
re
Bl
ow
n
fu
se
o
r
va
ri
st
or
Lo
os
e
co
nn
ec
o
ns
Sh
or
te
d
or
b
ro
ke
n
w
ir
es
Sa
fe
ty
d
ev
ic
e
op
en
s
Fa
ul
ty
th
er
m
os
ta
t /
r
oo
m
te
m
pe
ra
tu
re
s
en
so
r
W
ro
ng
s
e
ng
p
la
ce
o
f t
em
pe
ra
tu
re
s
en
so
r
Fa
ul
ty
tr
an
sf
or
m
er
Sh
or
te
d
or
o
pe
n
ca
pa
ci
to
r
Fa
ul
ty
m
ag
ne
c
c
on
ta
ct
or
fo
r
co
m
pr
es
so
r
Fa
ul
ty
m
ag
ne
c
c
on
ta
ct
or
fo
r
fa
n
Lo
w
v
ol
ta
ge
Fa
ul
ty
s
te
pp
in
g
m
ot
or
Sh
or
te
d
or
g
ro
un
de
d
co
m
pr
es
so
r
Sh
or
te
d
or
g
ro
un
de
d
fa
n
m
ot
or
Unit will not start
ƿ ƿ ƿ ƿ ƿ ƿ
Compressor will not start but fans run
ƿ ƿ ƿ ƿ ƿ
Compressor and condenser (outdoor) fan will not start
ƿ ƿ ƿ
Evaporator (indoor) fan will not start
ƿ ƿ ƿ ƿ
Condenser (Outdoor) fan will not start
ƿ ƿ ƿ ƿ ƿ
Unit runs, but shortly stops
ƿ ƿ
Compressor short-cycles due to overload
ƿ ƿ
High discharge pressure
Low discharge pressure
High sucon pressure
Low sucon pressure
Unit runs connuously but insufficient cooling
Too cool
ƿ ƿ
Compressor is noisy
Horizontal louver can not revolve
ƿ ƿ ƿ
Test method / remedy
Te
st
v
ol
ta
ge
In
sp
ec
t f
us
e
ty
pe
&
s
iz
e
In
sp
ec
t c
on
ne
c
on
s
-
gh
te
n
Te
st
c
ir
cu
its
w
ith
te
st
er
Te
st
c
on
n
ui
ty
o
f s
af
et
y
de
vi
ce
Te
st
c
on
n
ui
ty
o
f t
he
rm
os
ta
t /
s
en
so
r
&
w
ir
in
g
Pl
ac
e
th
e
te
m
pe
ra
tu
re
s
en
so
r
at
th
e
ce
nt
ra
l o
f
th
e
ai
r
in
le
t g
ri
lle
Ch
ec
k
co
nt
ro
l c
ir
cu
it
w
ith
te
st
er
Ch
ec
k
ca
pa
ci
to
r
w
ith
te
st
er
Te
st
c
on
n
ui
ty
o
f c
oi
l &
c
on
ta
ct
s
Te
st
c
on
n
ui
ty
o
f c
oi
l &
c
on
ta
ct
s
Te
st
v
ol
ta
ge
Re
pl
ac
e
th
e
st
ep
pi
ng
m
ot
or
Ch
ec
k
re
si
st
an
ce
w
ith
m
ul
m
et
er
Ch
ec
k
re
si
st
an
ce
w
ith
m
ul
m
et
er
Electrical Circuit