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