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Check method
On the remote controller (Main remote controller, Central control remote controller) and the interface P.C. board of
the outdoor unit (I/F), a check display LCD (Remote controller) or 7-segment display (on the outdoor interface P.C.
board) to display the operation is provided. Therefore the operation status can be known. Using this self-diagnosis
function, a trouble or position with error of the air conditioner can be found as shown in the table below.
Check code list
The following list shows each check code. Find the check contents from the list according to part to be checked.
• In case of check from indoor remote controller: See “Main remote controller display” in the list.
• In case of check from outdoor unit: See “Outdoor 7-segment display” in the list.
• In case of check from indoor unit with wireless remote controller: See “Sensor block display of receiving unit” in the list.
Terminology
AI-NET : Artificial Intelligence.
IPDU : Intelligent Power Drive Unit
¡ : Lighting,
¤
: Flashing, l : Goes off
ALT. : Flashing is alternately when there are two flashing LED.
SIM : Simultaneous flashing when there are two flashing LED.
Check code
Main
remote
controller
display
E01
E02
E03
E04
E06
—
E08
E09
E10
E12
E15
E16
E18
E19
E20
E23
E25
E26
E28
E31
Outdoor 7-segment display
Auxiliary code
——
——
——
——
No. of indoor units in which
E06
sensor has been normally received
E07 —
E08 Duplicated indoor addresses
——
——
01: Indoor/Outdoor communication
E12 02: Communication between
outdoor units
E15 —
E16
00: Capacity over
01
~: No. of connected units
——
E19
00: Header is nothing
02: Two or more header units
E20
01: Outdoor of other line connected
02: Indoor of other line connected
E23 —
E25 —
E26
No. of outdoor units which
received signal normally
E28 Detected outdoor unit number
01: IPDU1 error
02: IPDU2 error
03: IPDU1, 2 error
E31 04: Fan IPDU error
05: IPDU + Fan IPDU error
06: IPDU2 + Fan IPDU error
07: All IPDU error
Wireless remote controller
Sensor block display
of receiving unit
Operation
Timer Ready Flash
¤
ll
¤
ll
¤
ll
ll
¤
ll
¤
ll
¤
¤
ll
¤
ll
¤
ll
¤
ll
ll
¤
ll
¤
¤
ll
ll
¤
ll
¤
ll
¤
ll
¤
ll
¤
ll
¤
ll
¤
Check code name
Communication error between indoor and
remote controller
(Detected at remote controller side)
Remote controller transmission error
Communication error between indoor and
remote controller (Detected at indoor side)
Communication circuit error between indoor/
outdoor (Detected at indoor side)
Decrease of No. of indoor units
Communication circuit error between indoor/
outdoor (Detected at outdoor side)
Duplicated indoor addresses
Duplicated main remote controllers
Communication error between indoor MCU
Automatic address start error
Indoor is nothing during automatic addressing
Capacity over / No. of connected indoor units
Communication error between indoor units
Outdoor header units quantity error
Other line connected during automatic
address
Sending error in communication between
outdoor units
Duplicated follower outdoor addresses
Decrease of No. of connected outdoor units
Follower outdoor unit error
IPDU communication error
Judging device
Remote controller
Remote controller
Indoor
Indoor
I/F
I/F
Indoor / I/F
Remote controller
Indoor
I/F
I/F
I/F
Indoor
I/F
I/F
I/F
I/F
I/F
I/F
I/F
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TROUBLESHOOTING