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Check method
On the remote controller (Wired 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 "Wired 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.
Check code
Wired
Outdoor unit 7-segment display
remote
controller
display
E01
—
E02
—
E03
—
E04
—
No. of indoor units in which
E06
E06
sensor has been normally
received
—
E07
Duplicated indoor unit
E08
E08
addresses
E09
—
E10
—
E11
—
01: Indoor/Outdoor units
communication
E12
E12
02: Outdoor/Outdoor units
communication
E15
E15
00: Capacity over
E16
E16
01: No. of connected units
E18
—
00: Header is not detected
E19
E19
02: Two or more header
units
01: Outdoor unit of other line
connected
E20
E20
02: Indoor unit of other line
connected
39-EN
Wireless remote controller
Sensor block display of
Auxiliary code
Operation Timer Ready Flash
—
—
—
—
—
—
—
—
—
—
: Lighting,
: Flashing,
ALT: Flashing is alternately when there are two fl ashing LED.
SIM: Simultaneous fl ashing when there are two fl ashing LED.
Inverter: Compressor / Fan inverter P.C. board
receiving unit
Communication trouble between
indoor unit and remote controller
(Detected at remote controller side)
Remote controller transmission trouble
Communication trouble between
indoor unit and remote controller
(Detected at indoor unit side)
Communication circuit trouble between
indoor / outdoor unit
(Detected at indoor unit side)
Decrease of No. of indoor units
Communication circuit trouble between
indoor / outdoor unit
(Detected at outdoor unit side)
Duplicated indoor unit addresses
Duplicated master remote controllers
Communication trouble between
indoor unit MCU
Communication trouble between
Application control kit and Indoor unit
Automatic address start trouble
No indoor unit during automatic
addressing
Capacity over / No. of connected
indoor units
Communication trouble between
header and follower units Indoor unit
Outdoor header units quantity trouble
Other line connected during automatic
address
‒ 39 ‒
Installation Manual
: Goes off
Check code name
Judging
device
Remote
controller
Remote
controller
Indoor unit
Indoor unit
I/F
I/F
Indoor unit,
I/F
Remote
controller
Indoor unit
Indoor unit
Application
control kit
I/F
I/F
I/F
Indoor unit
I/F
I/F
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