MrCool DIY-MULTI2-18HP230C, Service Manual

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 Troubleshooting 20 
1.Remote Maintenance
Possible causes of trouble
Po
w
er
fa
ilu
re
The
m
ai
n po
w
er
tr
ippe
d
Loos
e c
on
ne
ct
ion
s
Fa
ul
ty
tr
an
sf
or
m
er
Th
e v
ol
ta
ge
is
too h
ig
h or
too l
ow
Th
e r
em
ot
e c
on
tr
ol
is
p
ow
er
ed
o
ff
Br
ok
en
re
m
ot
e c
on
tr
ol
Di
rt
y a
ir f
ilt
er
Di
rt
y c
onde
ns
er
fi
ns
The
se
tti
ng
te
m
pe
ra
tur
e i
s hi
ghe
r/
lo
w
er
tha
n t
he
ro
om
's(
co
ol
ing
/he
at
ing
)
The
a
m
bi
ent
te
m
pe
ra
tur
e i
s t
oo
hi
gh/
lo
w
w
he
n t
he
m
ode
is
c
oo
ling
/he
at
ing
Fa
n m
ode
SI
LE
NC
E f
unc
tio
n i
s a
ct
iv
at
ed(
opt
io
na
l f
unc
tio
n)
Fr
os
ting
a
nd de
fr
os
ting
fr
eque
nt
ly
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 continuously but insufficient cooling(heating)
☆ ☆ ☆ ☆ ☆
Cool can not change to heat
Unit is noisy
Test method / remedy
Te
st v
ol
ta
ge
Cl
os
e t
he p
ow
er
sw
itc
h
Ins
pe
ct
c
onne
ct
io
ns
- t
ig
ht
en
Cha
ng
e t
he
tr
ans
fo
rm
er
Te
st v
ol
ta
ge
Re
pl
ac
e t
he b
at
te
ry
o
f t
he
re
m
ot
e c
on
tr
ol
Re
pl
ac
e t
he r
em
ot
e c
on
tr
ol
Cl
ea
n o
r r
ep
la
ce
Cl
ea
n
Ad
ju
st th
e s
etti
ng
te
m
pe
ra
tu
re
Tur
n t
he
A
C l
at
er
Ad
ju
st
to c
ool
m
od
e
Tur
n o
ff S
ILE
NC
E f
unc
tio
n.
Tur
n t
he
A
C l
at
er
Refrigerant Circuit Electrical Circuit