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14
Troubleshooting
In addition to the CODE No. on the remote controller of an indoor unit, you can diagnose failure type of an outdoor
unit by checking the 7-segment display on the interface P.C. board.
Use the function for various checks.
Set every DIP switch to OFF after checking.
7-Segment display and check code
Rotary switch setting value
Indication
SW01
SW02
SW03
1
1
1
Outdoor unit check code
* If a check code has an auxiliary code, the display indicates the check code for three seconds and the auxiliary
code for one second alternately.
Check code (indicated on the 7-segment display on the outdoor unit)
Indicated when SW01 = [1], SW02 = [1], and SW03 = [1].
Check code
Indication on 7-segment display on the outdoor unit
Auxiliary code
E06
Number of indoor units which received normally
E
0
7
—
E
0
8
D
u
p
c i l
a
e t
d
n i
d
o
r o
a
d
d
e r
s s
e
s
01: Communication between indoor and outdoor units
E12
02: Communication between outdoor units
E
1
5
—
00: Capacity over
E16
01: Number of connected units
00: Header is not detected
E19
02: 2 or more header units
01: Other line outdoor connected
E20
02: Other line indoor connected
E
2
3
—
E
2
5
—
E26
Number of outdoor units which received normally
E
2
8
D
e
e t
c
e t
d
o
u
d t
o
r o
E31
Inverter quantity information
(*1)
E
3
1
8
0
F
0
4
—
F
0
5
—
01: TE1 sensor
F06
02: TE2 sensor
01: TL1 sensor
F07
02: TL2 sensor
03: TL3 sensor
F
0
8
—
7 - segment
LED
[U.
.E r r ]
[
.
]
Display alternately every 2 seconds
Display
: Outdoor Unit No.(1~5)
contents
: Check code
: Sub code
Check code name
Decrease of number of indoor units
No indoor unit with a terminating resistor set
(TU2C-Link)
n I
d
o
o
/ r
o
u
d t
o
r o
c
o
m
m
u
n
c i
t a
o i
n
i c
c r
i u
t t
o r
u
b
e l
D
u
p
c i l
t a
o i
n
f o
n i
d
o
r o
a
d
d
e r
s s
e
. s
Automatic addressing start trouble
N
o
n i
d
o
r o
u
n
t i
d
r u
n i
g
a
u
o t
m
a
c i t
a
d
d
e r
s s
n i
g
Capacity over / number of connected indoor units
Number of header outdoor unit trouble
Other lines connected during automatic addressing
S
e
n
d
n i
g
trouble
b
e
w t
e
e
n
o
u
d t
o
r o
u
n
s t i
o c
m
m
u
i n
a c
o i t
n
D
u
p
c i l
a
e t
d
o f
o l l
w
r e
o
u
d t
o
r o
a
d
d
e r
s s
s
t e
u
p
Decrease of connected outdoor units
F
o
o l l
w
r e
o
u
d t
o
r o
u
i n
t t
o r
u
b
e l
Inverter communication trouble
C
o
m
m
u
n
c i
t a
o i
n
t
o r
u
b
e l
b
e
w t
e
e
n
M
C
U
a
n
d
s
u
b
M
C
U
T
D
1
s
e
n
s
o
t r
o r
u
b
e l
T
D
2
s
e
n
s
o
t r
o r
u
b
e l
TE1 or TE2 sensor trouble
TL1, TL2 or TL3 sensor trouble
T
O
s
e
n
s
o
t r
o r
u
b
e l
Check code
Indication on 7-segment display on the outdoor unit
Auxiliary code
01: TS1 sensor
F12
03: TS3 sensor
04: TS3 sensor detached
1 : Compressor 1 side
F13
2 : Compressor 2 side
F
1
5
—
F
1
6
—
F
2
3
—
F
2
4
—
F
3
1
—
1 : Compressor 1 side
H01
2 : Compressor 2 side
1 : Compressor 1 side
H02
2 : Compressor 2 side
1 : Compressor 1 side
H03
2 : Compressor 2 side
H
0
5
—
H
0
6
—
H
0
7
—
01: TK1 sensor trouble
H08
02: TK2 sensor trouble
H
1
5
—
01: TK1 oil circuit trouble
H16
02: TK2 oil circuit trouble
1 : Compressor 1 side
H17
2 : Compressor 2 side
L02
Detected indoor unit address
L
0
4
—
L
0
6
N
u
m
b
r e
f o
p
i r
r o
n i
d
o
r o
u
n
s t i
L
0
8
—
L
1
0
—
L
1
7
—
L
2
8
—
00 : when there are many inverter P.C. board.
L29
: Inverter number information
L
3
0
D
e
e t
c
e t
d
n i
d
o
r o
u
n
t i
a
d
d
e r
s s
L
3
1
—
P
0
3
—
01 : Compressor 1 side
P04
02 : Compressor 2 side
1 : Compressor 1 side
2 : Compressor 2 side
P05
00: Power outage detection
01: Open phase detection
02: Miswiring detection
– 42 –
Check code name
TS1 or TS3 sensor trouble
TH (Heat sink) sensor trouble
Outdoor Temperature sensor miswiring (TE1, TL1)
O
u
d t
o
r o
p
e r
s s
u
e r
s
e
n
s
r o
m
s i
w
r i
n i
P
s
s
e
n
s
o
t r
o r
u
b
e l
P
d
s
e
n
s
o
t r
o r
u
b
e l
O
u
d t
o
r o
E
E
P
R
O
M
t
o r
u
b
e l
Compressor breaking down
Compressor trouble (Locked)
Current detection circuit system trouble
T
D
1
s
e
n
s
r o
m
s i
w
r i
n i
g
L
o
w
p
e r
s s
u
e r
p
o r
e t
c
v i t
e
o
p
r e
t a
o i
O
l i
e l
v
l e
d
o
w
n
d
e
e t
t c
o i
n
Temperature sensor trouble for oil level detection
T
D
2
s
e
n
s
r o
m
s i
w
r i
n i
g
Oil level detector circuit system trouble
Compressor trouble (step out)
Model mismatch of indoor and outdoor unit
O
u
d t
o
r o
s
s y
e t
m
a
d
d
e r
s s
d
u
p
c i l
t a
D
u
p
c i l
t a
o i
n
f o
n i
d
o
r o
u
n
s t i
i w
h t
p
n I
d
o
r o
u
n
t i
g
o r
u
p
a /
d
d
e r
s s
u
n
s
t e
O
u
d t
o
r o
u
n
t i
c
a
p
a
c
y t i
u
n
s
e
. t
n I
c
o
n
s
s i
e t
t n
m
o
d
e
s l
f o
o
u
d t
o
r o
u
O
u
d t
o
r o
u
n
s t i
m
s i
m
a
c t
h
Inverter quantity trouble
(*1)
E
x
e t
n r
a
i l
t n
r e
o l
k c
f o
n i
d
o
r o
u
n
t i
O
h t
r e
c
o
m
p
e r
s s
o
t r
o r
u
b
e l
s
i D
c s
h
a
g r
e
e t
m
p
e
a r
u t
e r
T
D
1
t
o r
u
High-pressure SW system operation
Inverter DC voltage (Vdc) trouble
(compressor) MG-CTT trouble
Power outage detection
Open phase detection
Miswiring detection
g
P (
, d
P
) s
n
o i
n
i r
r o
y t i
n
s t i
EN
b
e l
EN
EN
ID
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