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Check code
Outdoor 7-segment display
Sub-code
Fan
A3-IPDU
IPDU
1
2
1
01
○
02
○
03
○
○
08
○
L
2
9
Circle (O): Troubled IPDU
09
○
○
0A
○
○
0B
○
○
○
80 : Communication trouble between
MCU and Sub MCU
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
–
00: Open phase detected
P05
01: Compressor 1
02: Compressor 2
01: Compressor 1
P07
02: Compressor 2
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
7
–
P
1
9
O
u
d t
o
r o
u
n
t i
N
. o
d
e
e t
c
e t
d
P
2
0
–
Display of receiving unit
TCC-LINK
Indicator light block
central control
or main remote
Operation Timer Ready
Flash
controller
display
L
2
9
I S
M
L (
3
) 0
I S
M
P
0
3
A
L
P
0
5
A
L
P
0
7
A
L
P (
1
) 0
A
L
P
1
3
A
L
P
1
5
A
L
P
1
7
A
L
P
1
9
A
L
P
2
0
A
L
- 131 -
Typical problem site
There are insufficient number of IPDUs (P.C.
Trouble in number of IPDUs
boards) in inverter box.
Indoor unit has been shut down for external
Indoor external trouble
trouble input in one refrigerant line (detected by
input (interlock)
indoor unit).
Outdoor discharge (TD1)
Outdoor discharge temperature sensor (TD1) has
T
temperature trouble
detected abnormally high temperature.
Open phase/power failure
Open phase is detected when power is turned on.
Inverter DC voltage (Vdc)
T
Inverter DC voltage is too high (overvoltage) or too
trouble
low (undervoltage).
MG-CTT trouble
Temperature sensor built into IPM (TH) detects
Heat sink overheating
T
trouble
overheating.
Indoor unit has been shutdown in one refrigerant
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
State of refrigerant cycle circuit indicates liquid
T
backflow detection trouble
backflow operation.
Outdoor suction temperature sensor (TS1) detects
T
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.
Outdoor discharge (TD2)
Outdoor discharge temperature sensor (TD2)
T
temperature trouble
detects abnormally high temperature.
4-way valve reversing
Abnormality in refrigerating cycle is detected
T
trouble
during heating operation.
Activation of high-pressure
High pressure (PD) sensor detects high pressure
T
protection
that exceeds standard value.
Description of check code
MG-CTT: Magnet contactor
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Table of Contents
Troubleshooting
