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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
–
Comp.
Fa
n
O
01
O
02
O
O
03
L
2
9
Circle (O): Faulty 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 "04" 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
–
–
P05
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
Flash
controller
display
F
3
1
I S
M
O
Comp. case thermo
H04
operation
Outdoor discharge
H05
temperature sensor (TD)
wiring error
Activation of low-pressure
H06
protection
Duplicated outdoor
L
0
4
I S
M
refrigerant line address
Duplicated priority indoor
L
0
5
I S
M
unit (as displayed on
priority indoor unit)
Duplicated priority indoor
unit (as displayed on
L
0
6
I S
M
indoor unit other than
priority indoor unit)
Indoor group address not
L (
0
) 8
I S
M
set
L
1
0
I S
M
O
L
2
9
I S
M
E
Indoor external error input
L (
3
) 0
I S
M
(interlock)
Outdoor discharge (TD)
P
0
3
A
L
T
temperature error
Activation of high-pressure
P
0
4
A
L
T
SW
Inverter DC voltage (Vdc)
P
0
5
A
L
T
error
Heat sink overheating
P
0
7
A
L
T
error
P (
1
) 0
A
L
T
n I
Outdoor liquid backflow
P
1
3
A
L
T
detection error
P
1
5
A
L
T
G
4-way valve reversing
P
1
9
A
L
T
error
Activation of high-pressure
P
2
0
A
L
T
protection
89
112
Typical fault site
Outdoor EEPROM is faulty (alarm and shutdown
u
d t
o
r o
E
E
P
R
O
M
e
r r
r o
for outdoor unit and continued operation for
follower unit).
The case thermo operation has been detected.
Wiring / installation error 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.
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.
r r
r o
n i
n
u
m
b
r e
f o
P I
D
U
s
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.
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
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).
State of refrigerant cycle circuit indicates liquid
backflow operation.
Outdoor suction temperature sensor (TS) detects
a
s
e l
a
k
d
e
e t
t c
o i
n
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.
Description of error
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Troubleshooting
