Sharp AE-XM30GR, Service Manual

Page: 19 / 42

3 – 8
2. When one room is not cooled (other rooms are cooled)
Yes
Yes
No
Yes
No
No
No
Yes
No
No
Yes
Yes
Short
circuit
of
the
thermi
stor
error
Open
circuit
of
the
thermistor
error
Open
circuit
of
serial
s
ignal
line
Short
c
ircuit
of
serial
s
ignal
line
Is
the
timer
lamp
of
the
indoor
unit
in
the
room
not
cooled
flashing
?
Press
the
OPERATION
button
to
start
operating
the
air-conditioner.
(Set
the
cooling
mode
to
18û
C.)
Is
the
timer
lamp
of
the
indoor
unit
in
the
room
not
cooled
flashing
?
Check
that
the
p
ower
between
the
terminal
board
"N"
and
"1"
o
f
the
indoor
unit
is
AC
230V.
Repair
the
wiring
between
the
units.
Replace
the
indoor
control
PWB.
Replace
the
thermistor.
Check
the
failure
symptom
with
the
failure
diagnosis
mode.
Replace
the
outdoor
control
PWB
or
the
expansion
valve
(UNIT
A)
or
the
expansion
valve
(UNIT
B)
or
the
expansion
valve
(UNIT
C)
or
the
expansion
valve
(UNIT
D)
Is
the
resistance
value
of
the
winding
in
the
fan
m
otor
?
(Between
1
and
3
o
f
C
N1)
Abnormal
fan
m
otor
of
indoor
unit
The
thermal
fuse
is
blown.
The
m
otor
is
locked.
Replace
the
indoor
fan
m
oto
r.
Is
the
wiring
between
the
units
connected
by
mistake
or
broken
?
Repair
the
w
iring
between
the
units.
Replace
the
indoor
control
PWB.
Is
the
resistance
value
of
the
ther
-
mistor
for
UNIT
A
(TH6),
UNIT
B
(TH7),
UNIT
C
(TH8)
o
r
UNIT
D
(TH9)