– 52 –
MG-CTT: Magnet contactor
Trouble in number IPDUs
M
I
S
9
2
L
9
2
L
There are insufficient number of IPDUs (P.C.
boards) in inverter box.
M
I
S
)
0
3
L
(
.
o
N
t
i
n
u
r
o
o
d
n
i
d
e
t
c
e
t
e
D
0
3
L
Indoor external trouble
input (interlock)
Indoor unit has been shut down for external
trouble input in one refrigerant line (detected by
indoor unit).
T
L
A
3
0
P
–
3
0
P
Outdoor discharge (TD1)
temperature trouble
Outdoor discharge temperature sensor (TD1) has
detected abnormally high temperature.
P05
00: Open phase detected
T
L
A
5
0
P
Open phase/power failure
Open phase is detected when power is turned on.
Inverter DC voltage is too high (overvoltage) or too
low (undervoltage).
01: Compressor 1
02: Compressor 2
Inverter DC voltage (Vdc)
trouble
MG-CTT trouble
P07
01: Compressor 1
02: Compressor 2
T
L
A
7
0
P
Heat sink overheating
trouble
Temperature sensor built into
IPM
(TH) detects
overheating.
w
o
l
f
r
e
v
o
t
i
n
u
r
o
o
d
n
I
T
L
A
)
0
1
P
(
d
e
t
c
e
t
e
d
.
o
N
t
i
n
u
r
o
o
d
n
I
0
1
P
Indoor unit has been shutdown in one refrigerant
line due to detection of overflow (detected by
indoor unit).
T
L
A
3
1
P
–
3
1
P
Outdoor liquid backflow
detection trouble
State of refrigerant cycle circuit indicates liquid
backflow operation.
P15
01: TS condition
02: TD condition
n
o
i
t
c
e
t
e
d
k
a
e
l
s
a
G
T
L
A
5
1
P
Outdoor suction temperature sensor (TS1) detects
sustained and repeated high temperatures that
exceed standard value.
T
L
A
7
1
P
–
7
1
P
Outdoor discharge (TD2)
temperature trouble
Outdoor discharge temperature sensor (TD2)
detects abnormally high temperature.
T
L
A
9
1
P
d
e
t
c
e
t
e
d
.
o
N
t
i
n
u
r
o
o
d
t
u
O
9
1
P
4-way valve reversing
trouble
Abnormality in refrigerating cycle is detected
during heating operation.
T
L
A
0
2
P
–
0
2
P
Activation of high-pressure
protection
High pressure (Pd) sensor detects high pressure
that exceeds standard value.
Check code
Display of receiving unit
Typical
problem
site
Description of
problem
Outdoor 7-segment display
TCC-LINK
central control
or main remote
control
display
Indicator light block
Sub-code
Flash
Operation Timer Ready
1
2
1
2
1
2
1
2
01
10
02
11
03
12
08
13
09
18
0A
19
0B
1A
1B
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
A3-IPDU
A3-IPDU
Fan-IPDU
Fan-IPDU
Circle (O): IPDU trouble
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