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Check code
Typical fault site
Description of error
H01
H01
01: Compressor 1
02: Compressor 2
03: Compressor 3
Compressor breakdown
Overcurrent of the inverter current (Idc) detection circuit was
detected.
H02
H02
01: Compressor 1
02: Compressor 2
03: Compressor 3
Compressor error (Lock)
Compressor lock was detected.
H03
H03
01: Compressor 1
02: Compressor 2
03: Compressor 3
Current detection circuit error
Current error was detected while the compressor was stopped.
H04
H05
—
Compressor 1 case thermo
activation
Compressor 1 case thermo was activated for protection.
H05
H05
—
Outdoor discharge temperature
sensor (TD1) wiring error
Wiring / installation error or detachment of outdoor discharge
temperature sensor (TD1) has been detected.
H06
H06
—
Activation of low-pressure
protection
H07
H07
—
Activation of low-pressure
protection
H08
H08
01: TK1 sensor error
02: TK2 sensor error
03: TK3 sensor error
04: TK4 sensor error
05: TK5 sensor error
Error in temperature sensor for
oil level detection (TK1-5)
Temperature sensor for oil level detection (TK1-5) has been
open / short-circuited.
Temperature sensor for oil level detection (TK1-5) detects
abnormally low oil level.
H14
H14
—
Compressor 2 case thermo
activation
Compressor 2 case thermo was activated for protection.
H15
H15
—
Outdoor discharge temperature
sensor (TD2) wiring error
H16
H16
Oil level detection circuit error
No temperature change is detected by temperature sensor for oil
level detection (TK1-5) despite compressor having been started.
01: TK1 oil circuit error
02: TK2 oil circuit error
03: TK3 oil circuit error
04: TK4 oil circuit error
05: TK5 oil circuit error
Wiring / installation error or detachment of outdoor discharge
temperature sensor (TD2) has been detected.
H25
H25
—
Outdoor discharge temperature
sensor (TD3) wiring error
Wiring / installation error or detachment of outdoor discharge
temperature sensor (TD3) has been detected.
(L08)
L08
—
SIM Indoor group address not set
Address setting has not been performed for one or more indoor
units (also detected at indoor end).
L10
L10
—
Outdoor capacity not set
Outdoor unit capacity has not been set (after P.C. board
replacement).
L17
L17
—
Outdoor model incompatibility
error
L18
L18
—
FS (Flow Selector) unit error
Cooling / heating cycle error resulting from piping error is
detected.
L29
L29
SMMS-i (Series 4)
Error in number of IPDUs
There are insufficient number of IPDUs (P.C. boards) in inverter
box.
L28
L28
—
Too many outdoor units connected More than four outdoor units have been connected.
Old model outdoor unit (prior to 3 series) has been connected.
L04
L04
—
Duplicated outdoor
refrigerant line address
Identical refrigerant line address has been assigned to outdoor
units belonging to different refrigerant piping systems.
L02
Outdoor unit combination error
L02
—
Check the soft ware version on the I/F PC board of the outdoor
unit.
L06
L06
Number of priority indoor units
(check code L05 or L06
depending on individual unit)
Duplicated priority indoor unit (as
displayed on priority indoor unit)
More than one indoor unit has been set up as priority indoor unit.
Duplicated priority indoor unit (as
displayed on indoor unit other
than priority indoor unit)
More than one indoor unit has been set up as priority indoor unit.
Low pressure (Ps) sensor detects abnormally low operating
pressure.
TCC-LINK
central control
or main remote
controller
display
Outdoor 7-segment display
Sub-code
01
02
03
04
05
06
07
08
09
1 2
A3-IPDU Fan
IPDU
Fan
IPDU
3
0A
0B
0C
0D
0E
0F
1 2
A3-IPDU
O
O
O
O
O
O
O
O
3
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
Circle (
O
):
Faulty IPDU
Indoor unit (including Hot Water Module)
F31
F31
Outdoor EEPROM error
—
Outdoor EEPROM is faulty (alarm and shutdown for header unit
and continued operation for follower unit)
F25
F25
—
• Check connection of TA sensor connector.
• Check resistance characteristics of TA sensor.
F26
Indoor TA(TWI) sensor error
Indoor TC2(TWO) sensor error
F26
—
• Check connection of TC2 sensor connector.
• Check resistance characteristics of TC2 sensor.
F24
F24
High pressure sensor (Pd) error
—
Output voltage of high pressure sensor (Pd) is zero or provides
abnormal readings when compressors have been turned off.
