Table of Contents
Advertisement
Check code
Outdoor 7-segment display
central control
or main remote
Sub-code
01: TS1
F12
02: TS2
F15
—
F16
—
F22
—
—
F23
F24
—
F31
—
H05
—
H06
—
H07
—
01: TK1 sensor error
02: TK2 sensor error
H08
03: TK3 sensor error
04: TK4 sensor error
05: TK5 sensor error
H15
—
01: TK1 oil circuit error
02: TK2 oil circuit error
H16
03: TK3 oil circuit error
04: TK4 oil circuit error
05: TK5 oil circuit error
H25
—
L04
—
Number of priority indoor
units (check code L05 or
L06
L06 depending on
individual unit)
L08
—
L10
—
L17
—
L18
—
L28
—
A3-IPDU Fan
A3-IPDU Fan
1
2
3
IPDU
1
2
3
IPDU
01
0A
O
O
O
02
0B
O
O
O
O
03
O
O
0C
O
O
L29
04
O
0D
O
O
O
05
0E
O
O
O
O
O
06
0F
O
O
O
O
O
O
07
O
O
O
Circle ( O ):
08
O
Faulty IPDU
09
O
O
L30
Detected indoor unit No.
L31
—
P03
—
00: Open phase detected
P05
01: Compressor 1
02: Compressor 2
03: Compressor 3
01: Compressor 1
P07
02: Compressor 2
03: Compressor 3
P10
Indoor unit No. detected
Display of receiving unit
TCC-LINK
Indicator light block
Operation
Timer
Ready
controller
display
F12
F15
F16
F22
F23
F24
F31
H05
H06
H07
H08
H15
H16
H25
L04
L05
L06
(L08)
L10
L17
L18
L28
L29
L30
—
—
P03
P05
P07
(P10)
Typical fault site
Flash
Outdoor suction temperature
ALT
sensor (TS1, TS2) error
Outdoor temperature sensor
ALT
(TE1, TL) wiring error
Outdoor pressure sensor (Pd, Ps)
ALT
wiring error
Outdoor discharge temperature
ALT
sensor (TD3) error
ALT
Low pressure sensor (Ps) error
ALT
High pressure sensor (Pd) error
SIM
Outdoor EEPROM error
Outdoor discharge temperature
sensor (TD1) connection error
Activation of low-pressure
protection
Low oil level protection
Error in temperature sensor for
oil level detection (TK1-5)
Outdoor discharge temperature
sensor (TD2) connection error
Oil level detection circuit error
Outdoor discharge temperature
sensor (TD3) connection error
Duplicated outdoor refrigerant line
SIM
address
Duplicated priority indoor unit (as
SIM
displayed on priority indoor unit)
Duplicated priority indoor unit (as
SIM
displayed on indoor unit other than
priority indoor unit)
SIM
Indoor group address not set
SIM
Outdoor capacity not set
Outdoor model incompatibility
SIM
error
Cooling/heating selection unit
SIM
error
Too many outdoor units
SIM
connected
SIM
Error in number of IPDUs
Indoor external error input
SIM
(interlock)
Other IPDU error
Outdoor discharge (TD1)
ALT
temperature error
Open phase/power failure
ALT
Inverter DC voltage (Vdc) error
MG-CTT error
ALT
Heat sink overheating error
ALT
Indoor unit overflow
– 133 –
Description of error
Outdoor suction temperature sensor (TS1, TS2) has
been open/short-circuited.
Wiring error in outdoor temperature sensors (TE1, TL)
has been detected.
Wiring error in outdoor pressure sensors (Pd, Ps)
has been detected.
Outdoor discharge temperature sensor (TD3) has
been open/short-circuited.
Output voltage of low pressure sensor (Ps) is zero.
Output voltage of high pressure sensor (Pd) is zero
or provides abnormal readings when compressors
have been turned off.
Outdoor EEPROM is faulty (alarm and shutdown for
header unit and continued operation for follower unit)
Wiring/installation error or detachment of outdoor
discharge temperature sensor (TD1) has been
detected.
Low pressure (Ps) sensor detects abnormally low
operating pressure.
Temperature sensor for oil level detection (TK1-5)
detects abnormally low oil level.
Temperature sensor for oil level detection (TK1-5)
has been open/short-circuited.
Wiring/installation error or detachment of outdoor
discharge temperature sensor (TD2) has been
detected.
No temperature change is detected by temperature
sensor for oil level detection (TK1-5) despite
compressor having been started.
Wiring/installation error or detachment of outdoor
discharge temperature sensor (TD3) has been
detected.
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.
board replacement).
Old model outdoor unit (prior to 3 series) has been
connected.
Cooling/heating cycle error resulting from piping
error is detected.
More than 3 outdoor units have been connected.
There are insufficient number of IPDUs
(P.C. 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 (TD1) has
detected abnormally high temperature.
Open phase is detected when power is turned on.
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 line
due to detection of overflow (detected by indoor unit).
MG-CTT: Magnet contactor
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
