148-EN
147-EN
– 74 –
EN
In addition to the CODE No. on the remote controller of an indoor unit, you can diagnose failure type of an outdoor
unit by checking the 7-segment display on the interface P.C. board.
Use the function for various checks.
Set every DIP switch to OFF after checking.
7-Segment display and check code
Rotary switch setting value
Indication
7 - segment
LED
SW01
SW02
SW03
1
1
1
Outdoor unit check code
Display
contents
[U.
ᅷ
.E r r ]
[
ᇲᇲᇲ
.
]
Display alternately every 2 seconds
ᅷ
: Outdoor Unit No.(1~5)
ᇲᇲᇲ
: Check code
: Sub code
* If a check code has an auxiliary code, the display indicates the check code for three seconds and the auxiliary
code for one second alternately.
Check code (indicated on the 7-segment display on the outdoor unit)
Indicated when SW01 = [1], SW02 = [1], and SW03 = [1].
Check code
Check code name
Indication on 7-segment display on the outdoor unit
Auxiliary code
E06
Number of indoor units which received normally
• Decrease of number of indoor units
• No indoor unit with a terminating resistor set
E07
—
Indoor / outdoor communication circuit trouble
E08
Duplicated indoor addresses
Duplication of indoor addresses.
E12
01: Communication between indoor and outdoor units
02: Communication between outdoor units
Automatic addressing start trouble
E15
—
No indoor unit during automatic addressing
E16
00: Capacity over
01: Number of connected units
Capacity over / number of connected indoor units
E19
00: Header is not detected
02: 2 or more header units
Number of header outdoor unit trouble
E20
01: Other line outdoor connected
02: Other line indoor connected
Other lines connected during automatic addressing
E23
—
Sending trouble between outdoor units
communication
E25
—
Duplicated follower outdoor address set up
E26
Number of outdoor units which received normally
Decrease of connected outdoor units
E28
Detected outdoor
Follower outdoor unit trouble
E31
Inverter quantity information
(*1)
Inverter communication trouble
E31
80
Communication trouble between MCU and sub MCU
F04
—
TD1 sensor trouble
F05
—
TD2 sensor trouble
F06
01: TE1 sensor
02: TE2 sensor
03: TE3 sensor
TE1, TE2 or TE3 sensor trouble
F07
01: TL1 sensor
02: TL2 sensor
03: TL3 sensor
TL1, TL2 or TL3 sensor trouble
F08
—
TO sensor trouble
Check code
Check code name
Indication on 7-segment display on the outdoor unit
Auxiliary code
F09
01: TG1 sensor
02: TG2 sensor
03: TG3 sensor
TG1,TG2 or TG3 sensor trouble
F12
01: TS1 sensor
02: TS2 sensor
03: TS3 sensor
04: TS3 detached
TS1,TS2 or TS3 sensor trouble
F13
1
ᅷ
: Compressor 1 side
2
ᅷ
: Compressor 2 side
TH (Heat sink) sensor trouble
F15
—
Outdoor Temperature sensor miswiring (TE1, TL1)
F16
—
Outdoor pressure sensor miswiring (Pd, Ps)
F23
—
Ps sensor trouble
F24
—
Pd sensor trouble
F31
—
Outdoor EEPROM trouble
H01
1
ᅷ
: Compressor 1 side
2
ᅷ
: Compressor 2 side
Compressor breaking down
H02
1
ᅷ
: Compressor 1 side
2
ᅷ
: Compressor 2 side
Compressor trouble (Locked)
H03
1
ᅷ
: Compressor 1 side
2
ᅷ
: Compressor 2 side
Current detection circuit system trouble
H05
—
TD1 sensor miswiring
H06
—
Low pressure protective operation
H07
—
Oil level down detection
H08
01: TK1 sensor trouble
02: TK2 sensor trouble
Temperature sensor trouble for oil level detection
H15
—
TD2 sensor miswiring
H16
01: TK1 oil circuit trouble
02: TK2 oil circuit trouble
Oil level detector circuit system trouble
H17
1
ᅷ
: Compressor 1 side
2
ᅷ
: Compressor 2 side
Compressor trouble (step out)
H28
1
ᅷ
: Compressor 1 side
2
ᅷ
: Compressor 2 side
Compressor motor winding trouble
J30
Detected indoor unit address
Refrigerant leak detection
L02
Detected indoor unit address
• Model mismatch of indoor and outdoor unit
• Indoor unit incompatible with A2L refrigerant
L04
—
Outdoor system address duplication
L06
Number of prior indoor units
Duplication of indoor units with priority
L08
—
Indoor unit group/address unset
L10
—
Outdoor unit capacity unset.
L11
Detected indoor unit address
FS unit or Shut-off Valve unit installation trouble
L13
Detected indoor unit address
Safety measures setting unmatch
L14
Detected indoor unit address
Safety measures nonconformity
L17
—
Inconsistent models of outdoor units
L24
02 : Indoor units operation mode priority setting
Flow Selector unit(s) setting trouble
L28
—
Too many outdoor units connected
L29
00 : when there are many inverter P.C. board.
ᅷᅷ
: Inverter quantity information
(*1)
Inverter quantity trouble
15
Troubleshooting