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(Errors detected by IPDU featuring in outdoor unit - typical examples)
Check code
Outdoor 7-segment display
Sub-code
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: TS1 condition
P15
02: TD condition
P
1
9
–
P
2
0
–
F
1
3
–
H
0
1
–
H02
–
H03
–
P
0
7
–
0: IGBT shortcircuit
1: Position detection circuit trouble
P22
3: Motor lockup trouble
C: TH Sensor temperature trouble
( : Fan motor number)
P
2
6
–
P
2
9
–
Note: The above check codes are examples only, and different check codes may be displayed depending on the outdoor unit configuration
(e.g. a Super heat recovery multi system). For details, see the service manual for the outdoor unit.
Display of receiving unit
Indicator light block
TCC-LINK
central control
or main remote
Operation Timer
Ready
Flash
controller
display
L (
3
) 0
I S
P
0
3
A
P
0
4
A
P
0
5
A
P
0
7
A
P (
1
) 0
A
P
1
3
A
P
1
5
A
P
1
9
A
P
2
0
A
F
1
3
A
H
0
1
H02
H03
P
0
7
A
P
2
2
A
P
2
6
A
P
2
9
A
113
Typical trouble site
Indoor external error input
Indoor unit has been shut down for external error
M
(interlock)
input in one refrigerant line (detected by indoor unit).
Outdoor discharge (TD)
Outdoor discharge temperature sensor (TD) has
L
T
temperature trouble
detected abnormally high temperature.
Activation of high-pressure
High-pressure SW is activated.
L
T
SW
Phase missing detection
Open phase is detected when power is turned on.
L
T
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
L
T
trouble
overheating.
Indoor unit has been shutdown in one refrigerant
L
T
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
L
T
detection trouble
backflow operation.
Outdoor suction temperature sensor (TS1) or
L
T
G
a
s
e l
a
k
d
e
e t
t c
o i
n
Outdoor discharge temperature sensor (TD)
detects sustained and repeated high temperatures
that exceed standard value.
4-way valve reversing
Abnormality in refrigerating cycle is detected
L
T
trouble
during heating operation.
Activation of high-pressure
High pressure (PD) sensor detects high pressure
L
T
protection
that exceeds standard value.
Trouble in temperature
Temperature sensor built into outdoor IGBT (TH)
L
T
sensor built into outdoor
has been open / short-circuited.
IGBT (TH)
Inverter current (Idc) detection circuit detects
C
o
m
p
e r
s s
r o
b
e r
a
k
d
o
w
n
overcurrent.
Compressor trouble (lockup) Compressor lockup is detected.
Current detection circuit
Abnormal current is detected while inverter
trouble
compressor is turned off.
Heat sink overheating
Temperature sensor built into IGBT (TH) detects
L
T
trouble
overheating.
L
T
O
u
d t
o
r o
a f
n
P I
D
U
trouble
O
u
Short-circuit protection for compressor motor
Activation of IGBT (IPM)
L
T
driver circuit components is activated (momentary
short-circuit protection
overcurrent).
Compressor position
Compressor motor position detection trouble is
L
T
detection circuit trouble
detected.
99
Description of check code
d t
o
r o
a f
n
P I
D
U
d
e
e t
c
s t
trouble.
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Troubleshooting
