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List of check codes (outdoor unit)
(Errors detected by SMMS outdoor interface -
typical examples)
Check code
Outdoor 7-segment display
Sub-code
Number of indoor units from which
E06
signal is received normally
E07
—
E08 Duplicated indoor address
01: Indoor-outdoor communication
02: Outdoor-outdoor
E12
communication
E15
—
00: Overloading
E16
01: Number of units connected
00: No header unit
E19
02: Two or more header units
01: Connection of outdoor unit
from other refrigerant line
E20
02: Connection of indoor unit
from other refrigerant line
E23
—
E25
—
Address of outdoor unit from which
E26
signal is not received normally
E28
Detected outdoor unit No.
A3-IPDU
Fan
A3-IPDU
IPDU
1 2
3
1 2
01
O
0A
O
02
O
0B
O
O
03
O
O
0C
E31
04
O
0D
O
05
O
O
0E
O
06
O
O
0F
O
O
07
O
O
O
Circle (O):
Faulty IPDU
08
O
09
O
O
F04
—
F05
—
01: TE1
F06
02: TE2
F07
—
F08
—
F11
—
F12
—
01: Compressor 1
F13
02: Compressor 2
03: Compressor 3
F15
—
F16
—
F19
—
F22
—
F23
—
When the indoor unit connection capacity is calculated, AP005 is calculated as 0.8 HP.
TCC-LINK
central control
or main remote
controller
display
E06
Dropping out of indoor unit
Indoor-outdoor communication
(E04)
circuit error
(E08)
Duplicated indoor address
E12
Automatic address starting error
Indoor unit not found during
E15
automatic address setting
Too many indoor units
E16
connected / overloading
Error in number of outdoor
E19
header units
Connection to other refrigerant
E20
line found during automatic
address setting
Outdoor-outdoor communication
E23
transmission error
Duplicated follower outdoor
E25
address
E26
Dropping out of outdoor unit
E28
Outdoor follower unit error
Fan
IPDU
3
O
O
O
O
E31
IPDU communication error
O
O
O
O
O
O
Outdoor discharge temperature
F04
sensor (TD1) error
Outdoor discharge temperature
F05
sensor (TD2) error
Outdoor heat exchanger
F06
temperature sensor (TE1, TE2)
error
Outdoor liquid temperature
F07
sensor (TL) error
Outdoor outside air
F08
temperature sensor (TO) error
F11
Outdoor suction
F12
temperature sensor (TS1) error
Outdoor IGBT built-in
F13
temperature sensor (TH) error
Outdoor temperature sensor
F15
(TE1, TL) wiring error
Outdoor pressure sensor (Pd, Ps)
F16
wiring error
F19
Indoor TF(TCJ2) sensor error
Outdoor discharge temperature
F22
sensor (TD3) error
F23
Low pressure sensor (Ps) error
IPDU: Intelligent Power Drive Unit (Inverter P.C. board)
Indoor unit (including Hot Water Module)
Typical fault site
Indoor unit initially communicating normally fails to return signal
(reduction in number of indoor units connected).
Signal cannot be transmitted to indoor units (indoor units left
without communication from outdoor unit).
More than one indoor unit is assigned same address (also
detected at indoor unit end).
Indoor automatic address setting is started while automatic
address setting for equipment in other refrigerant line is in progress.
Outdoor automatic address setting is started while automatic
address setting for indoor units is in progress.
Indoor unit fails to communicate while automatic address setting
for indoor units is in progress.
Combined capacity of indoor units is too large (more than 135 %
of combined capacity of outdoor units).
There is no or more than one outdoor header unit in one
refrigerant line.
Indoor unit from other refrigerant line is detected while indoor
automatic address setting is in progress.
Signal cannot be transmitted to other outdoor units.
There is duplication in outdoor addresses set manually.
Follower outdoor unit initially communicating normally fails to do
so (reduction in number of follower outdoor units connected).
Outdoor header unit detects fault relating to follower outdoor unit
(detail displayed on follower outdoor unit).
There is no communication between IPDUs (P. C. boards) in
inverter box.
Outdoor discharge temperature sensor (TD1) has been open /
short-circuited.
Outdoor discharge temperature sensor (TD2) has been open /
short-circuited.
Outdoor heat exchanger temperature sensors (TE1, TE2) have
been open / short-circuited.
Outdoor liquid temperature sensor (TL) has been open /
short-circuited.
Outdoor outside air temperature sensor (TO) has been open /
short-circuited.
Outdoor suction temperature sensor (TS1) has been open /
short-circuited.
Open-circuit or short-circuit of the outdoor IGBT built-in
temperature sensor (TH) was detected.
Wiring error in outdoor temperature sensors (TE1, TL) has been
detected.
Wiring error in outdoor pressure sensors (Pd, Ps) has been
detected.
• Check connection of TF sensor connector.
• Check resistance characteristics of TF sensor.
Outdoor discharge temperature sensor (TD3) has been open /
short-circuited.
Output voltage of low pressure sensor (Ps) is zero.
– 40 –
Description of error
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Troubleshooting
