10
MAINTENANCE
sym
p
tom
T
he
o
p
era
ti
on
noi
se
s
udde
nl
y
i
nc
re
as
es
is
a
ct
iva
te
d.
Be
ca
us
e
the
t
em
p
era
ture
of
t
he
he
ad
e
xc
ha
nge
r
ri
se
s
ab
ru
p
tl
y,
T
hi
s
ha
pp
ens
i
f
the
t
em
p
era
ture
a
nd
/or
hum
idi
ty
of
t
he
T
he
o
p
era
ti
on
noi
se
i
nc
re
as
es
w
he
n
t
he
c
om
p
re
ss
or
Re
as
on
W
he
n
t
he
uni
t
is
fi
rs
t
us
ed,
t
he
di
sc
ha
rge
d
V
ery
l
it
tl
e
de
hum
idi
fyi
ng
t
ake
s
p
la
ce
,
T
he
hum
idi
ty
doe
s
not
dro
p
duri
ng
us
e.
or
none
t
ake
s
p
la
ce
.
ai
r
sm
el
ls
m
us
ty.
room
i
s
suffi
ci
ent
ly l
ow
.
an
unus
ua
l
or
m
us
ty
odour
m
ay
oc
cur.
The following symptoms do not indicate a breakdown
1) T
he
hum
idi
ty s
et
ti
ng i
s i
nc
orre
ct
.
2) T
he
room
not
w
arm
.
3) T
he
fi
lt
er c
logge
d
w
it
h dus
t.
4) T
he
uni
t t
oo c
los
e t
o w
al
l or a
ny o
bj
ec
t.
5) Is
t
he
room
s
iz
e t
oo
b
ig for t
he
uni
t?
6) A
re
w
indow
s or doors
o
p
ene
d a
nd c
los
ed fre
que
nt
ly?
