Service Manual

29
9.3.2 Indoor / outdoor unit’s communication diagnosis and solution(E1)
Error Code
E1
Malfunction decision
conditions
Indoor unit does not receive the feedback from outdoor unit during
110 seconds and this condition happens four times continuously.
Supposed causes ● Wiring mistake
●
Indoor or outdoor PCB faulty
Trouble shooting:
M
e
a
s
u
r
e
V
s
,
i
s
i
t
p
o
s
i
t
i
v
e
f
l
u
c
t
u
a
t
i
o
n
?
(
V
s
i
s
t
h
e
v
o
l
t
a
g
e
b
e
t
w
e
e
n
2
a
n
d
3
o
f
o
u
t
d
o
o
r
u
n
i
t
.
R
e
d
p
a
n
-
3
,
B
l
a
c
k
p
a
n
-
2
)
Measure Vs, is it positive fluctuation?
(Vs is the voltage between 2 and 3 of
outdoor unit. Red pan-3, Black pan-2)
Yes
P
o
w
e
r
o
f
f
fff
,
t
h
e
n
r
e
s
t
a
r
t
t
h
e
u
n
i
t
2
m
i
n
u
t
e
s
l
a
t
e
r
Power off, then restart the unit 2 minutes later
No
R
e
p
l
a
c
e
t
h
e
o
u
t
d
o
o
r
m
a
i
n
P
C
B
.
P
o
w
e
r
o
n
.
I
s
t
h
e
e
r
r
o
r
e
x
t
i
n
g
u
i
s
h
e
d
?
Replace the outdoor main PCB.
Power on. Is the error
extinguished?
C
h
e
c
k
t
h
e
o
u
t
d
o
o
r
w
i
r
i
n
g
c
o
n
n
e
c
t
i
o
n
Check the outdoor wiring connection
R
e
p
l
a
c
e
t
h
e
i
n
d
o
o
r
m
a
i
n
P
C
B
.
P
o
w
e
r
o
n
.
I
s
t
h
e
e
r
r
o
r
e
x
t
i
n
g
u
i
s
h
e
d
?
C
g
Replace the indoor main PCB.
Power on. Is the error
extinguished?
Yes
R
e
p
l
a
c
e
t
h
e
o
u
t
d
o
o
r
m
a
i
n
P
C
B
.
Replace the outdoor main PCB.
No
R
e
p
l
a
c
e
t
h
e
i
n
d
o
o
r
m
a
i
n
P
C
B
.
Replace the indoor main PCB.
No
C
h
e
c
k
t
h
e
i
n
d
o
o
r
w
i
r
i
n
g
c
o
n
n
e
c
t
i
o
n
Check the indoor wiring connection
Yes
Yes
C
h
e
c
k
w
h
e
t
h
e
r
r
e
a
c
t
o
r
i
s
n
o
r
m
a
l
?
C
i
s
Check whether reactor
is normal?
Yes
R
e
p
l
a
c
e
t
h
e
r
e
a
c
t
o
r
Replace the reactor No
* Vs is the voltage between S and N ( for 115V 2014 models)
*Vs is the voltage between 2 and 3 ( for 2015 models)
*