Troubleshooting 14
1. Remote Maintenance
Possible causes of trouble
He
av
y
lo
ad
c
ond
i
�
on
Loo
se
n
ho
ld
d
ow
n
bo
lts
a
nd
/
o
r s
cr
ew
s
Ba
d
ai
rp
roo
f
Th
e
ai
r i
nl
et
o
r o
ut
le
t o
f e
ith
er
un
it
is
bl
oc
ke
d
In
te
rf
er
en
ce
fr
om
c
ell
ph
on
e
to
w
er
s a
nd
re
m
ot
e
boo
st
er
s
Sh
ipp
in
g
pl
at
es
re
m
ai
n
a
�
ac
he
d
Unit will not start
The power switch is on but fans will not start
The temperature on the display board cannot be set
Unit is on but the wind is not cold (hot)
Unit runs, but shortly stops
The unit starts up and stops frequently
Unit runs con
�
nuously but insu
ffi
cient cooling (hea
�
ng)
Cool can not change to heat
Unit is noisy
Test method / remedy
Ch
ec
k
he
at
lo
ad
Ti
gh
te
n
bo
lts
o
r s
cr
ew
s
Cl
os
e
all
th
e
w
ind
ow
s a
nd
d
oo
rs
Re
m
ov
e
th
e
ob
st
ac
le
s
Re
co
nn
ec
t t
he
p
ow
er
o
r p
re
ss
O
N/
OF
F
bu
�
on
o
n
re
m
ot
e
co
nt
ro
l t
o
re
st
ar
t o
pe
ra
�
on
Re
m
ov
e
th
em
Others
