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Troubleshooting
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
LED
D600
A
B
D601 D602 D603 D604
SW01
SW02
SW03
1
1
1
Outdoor unit check code
A
Outdoor unit number
(U
1
to U
3
)
B
Check code display*
* 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
E07
—
Indoor/outdoor communication circuit error
E08
Duplicated indoor addresses
Duplication of indoor addresses.
E12
01: Communication between indoor and outdoor units
02: Communication between outdoor units
Automatic addressing start error
E15
—
No indoor unit during automatic addressing
E16
00: Capacity over
01~: Number of connected units
Capacity over / number of connected indoor units
E17
—
Indoor/Flow selector unit communication error
E19
00: Header is nothing
02: 2 or more header units
Number of header outdoor unit error
E20
01: Other line outdoor connected
02: Other line indoor connected
Other lines connected during automatic addressing
E23
—
Sending error 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 unit No.
Follower outdoor unit error
E31
IPDU quantity information
(*1)
IPDU communication error
E31
80
Communication error between MCU and sub MCU
F04
—
TD1 sensor error
F05
—
TD2 sensor error
F06
01: TE1 sensor
02: TE2 sensor
TE1 sensor error
TE2 sensor error
F07
01: TL1 sensor
TL1 sensor error
F08
—
TO sensor error
Check code
Check code name
Indication on 7-segment display on the outdoor unit
Auxiliary code
F12
01: TS1 sensor
02: TS2 sensor
TS1 or TS2 sensor error
F13
01: Compressor 1
02: Compressor 2
TH (Heat sink) sensor error
F15
—
Outdoor temp. sensor miswiring (TE1, TL1)
F16
—
Outdoor pressure sensor miswiring (Pd, Ps)
F23
—
Ps sensor error
F24
—
Pd sensor error
F31
—
Outdoor EEPROM error
H01
01: Compressor 1
02: Compressor 2
Compressor breaking down
H02
01: Compressor 1
02: Compressor 2
Compressor error (Locked)
H03
01: Compressor 1
02: Compressor 2
Current detection circuit error
H05
—
TD1 sensor miswiring
H06
—
Low pressure protective operation
H07
Detected outdoor unit No.
Oil level down detection
(Indicated only on the header outdoor unit)
H08
01: TK1 sensor error
02: TK2 sensor error
04: TK4 sensor error
05: TK5 sensor error
Temperature sensor error for oil level
H15
—
TD2 sensor miswiring
H16
01: TK1 oil circuit error
02: TK2 oil circuit error
04: TK4 oil circuit error
05: TK5 oil circuit error
Oil level detector circuit error
J03
—
Flow selector units duplicated
J10
Flow selector units over
fl
ow error
Flow selector units over
fl
ow error
J11
—
Flow selector TCS sensor error
L02
Model mismatch of indoor and outdoor unit
System shutdown error from indoor unit
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.
L12
01: Flow selector unit(s) installation error
Flow selector unit(s) system error
L17
00:
—
Inconsistent models of outdoor units
FE: Flow selector units connected capacity
Flow selector units connected capacity over
L18
Detected indoor unit address
Flow selector unit error
L23
01: Clean Converter setting error
Setting error
L24
d0: Duplication of
fl
ow selector unit address
d1: Indoor unit(s) operation mode priority setting
Flow selector unit(s) system error
L28
—
Outdoor connected quantity over
L29
IPDU number information
(*1)
IPDU quantity error
L30
Detected indoor unit address
External interlock of indoor unit
L31
—
Other compressor errors
1117701001-EN.indd 88
1117701001-EN.indd 88
2/26/2559 BE 11:48 AM
2/26/2559 BE 11:48 AM