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Check code
Outdoor 7-segment display
Sub-code
F
3
1
–
H04
–
H05
–
H06
–
L
0
4
–
Number of priority indoor units
L06
(check code L05 or L06 depending
on individual unit)
L
0
8
–
L
1
0
–
Fan IPDU
A3-IPDU
1 (Upper) 2 (Lower)
Refer to (*).
O
01
O
02
O
O
03
04
O
05
O
06
O
O
07
L
2
9
Circle (O): Troubled IPDU
(*) Concerning the "00" auxiliary code
1) The wrong model setting for the interface
P.C. board was used when the board was
replaced with the service P.C. board.
In such a case, the sub-codes "08" to "0F"
for L29, which are not included in the table
above, may be displayed.
2) The wrong model setting for the fan IPDU
P.C. board was used when the board was
replaced with the service P.C. board.
L
3
0
D
e
e t
c
e t
d
n i
d
o
r o
u
n
t i
N
P
0
3
–
P
0
4
–
00: Open phase detected
P05
*E(*: Fan motor number)
–
P
0
7
–
P
1
0
n I
d
o
r o
u
n
t i
N
. o
d
e
e t
c
e t
P
1
3
–
01: TS condition
P15
02: TD condition
P
1
9
–
P
2
0
–
AMP Air Conditioning
Display of receiving unit
TCC-LINK
Indicator light block
central control
or main remote
Operation Timer
controller
display
F
3
1
H04
H05
H06
L
0
4
L
0
5
L
0
6
L (
0
) 8
L
1
0
O
O
O
O
L
2
9
. o
L (
3
) 0
P
0
3
P
0
4
P
0
5
P
0
7
d
P (
1
) 0
P
1
3
P
1
5
P
1
9
P
2
0
Typical trouble site
Ready
Flash
O
u
d t
o
r o
E
E
P
R
O
M
check
I S
M
code
Comp. case thermostat
operation
Outdoor discharge
temperature sensor (TD)
wiring trouble
Activation of low-pressure
protection
Duplicated outdoor
I S
M
refrigerant line address
Duplicated priority indoor
I S
M
unit (as displayed on
priority indoor unit)
Duplicated priority indoor
unit (as displayed on
I S
M
indoor unit other than
priority indoor unit)
Indoor group address not
I S
M
set
I S
M
O
u
d t
o
r o
c
a
p
a
c
y t i
n
t o
s
t e
I S
M
Trouble in number of IPDUs
Indoor external error input
I S
M
(interlock)
Outdoor discharge (TD)
A
L
T
temperature trouble
Activation of high-pressure
A
L
T
SW
Phase missing detection
A
L
T
Fan motor Vdc trouble
Compressor Vdc trouble
Heat sink overheating
A
L
T
trouble
A
L
T
n I
d
o
r o
u
n
t i
o
v
e
f r
o l
w
Outdoor liquid backflow
A
L
T
detection trouble
A
L
T
G
a
s
e l
a
k
d
e
e t
t c
o i
n
4-way valve reversing
A
L
T
trouble
Activation of high-pressure
A
L
T
protection
101
112
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Description of check code
Outdoor EEPROM is troubled (alarm and
shutdown for outdoor unit and continued
operation
for
follower unit).
The case thermostat operation has been detected.
Wiring / installation trouble or detachment of
outdoor
discharge temperature sensor (TD) has
been
detected.
Low pressure (PS) sensor detects abnormally low
operating pressure.
Identical refrigerant line address has been
assigned to outdoor units belonging to different
refrigerant piping systems.
More than one indoor unit has been set up as
priority indoor unit.
More than one indoor unit has been set up as
priority indoor unit.
Address setting has not been performed for one or
more indoor units (also detected at indoor end).
Outdoor unit capacity has not been set (after P.C.
board replacement).
There are insufficient number of IPDUs (P.C.
boards) in inverter box.
Indoor unit has been shut down for external error
input in one refrigerant line (detected by indoor unit).
Outdoor discharge temperature sensor (TD) has
detected abnormally high temperature.
High-pressure SW is activated.
Open phase is detected when power is turned on.
Inverter DC voltage is too high (overvoltage) or too
low (undervoltage).
Temperature sensor built into IGBT (TH) detects
overheating.
Indoor unit has been shutdown in one refrigerant
line due to detection of overflow (detected by
indoor unit).
State of refrigerant cycle circuit indicates liquid
backflow operation.
Outdoor suction temperature sensor (TS) detects
sustained and repeated high temperatures that
exceed standard value.
Abnormality in refrigerating cycle is detected
during heating operation.
High pressure (PD) sensor detects high pressure
that exceeds standard value.
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Troubleshooting
