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7-2. Check Method
On the remote controller (Main remote controller, Central control remote controller) and the interface P.C. board
of the outdoor unit, 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-diagno-
sis function, a trouble or position with trouble 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.
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 Wireless remote controller
Outdoor 7-segment display
Sensor block display
of receiving unit
Main
remote
controller
display
Auxiliary code
Operation
Timer Ready Flash
Check code name Judging device
E01 ——
¤
ll
Communication error between indoor and remote
controller (Detected at remote controller side)
Remote controller
E02 ——
¤
ll
Remote controller transmission error Remote controller
E03 ——
¤
ll
Communication error between indoor and remote
controller (Detected at indoor side)
Indoor
E04 ——
ll
¤
Communication circuit error between
indoor/outdoor (Detected at indoor side)
Indoor
E06 E06
No. of indoor units in which sensor has
been normally received
ll
¤
Decrease of No. of indoor units I/F
— E07 —
ll
¤
Communication circuit error between
indoor/outdoor (Detected at outdoor side)
I/F
E08 E08 Duplicated indoor addresses
¤
ll
Duplicated indoor addresses Indoor / I/F
E09 ——
¤
ll
Duplicated main remote controllers Remote controller
E10 ——
¤
ll
Communication error between indoor MCU Indoor
E12 E12
01: Indoor/Outdoor communication
02: Communication between outdoor units
¤
ll
Automatic address start error I/F
E15 E15 —
ll
¤
Indoor is nothing during automatic addressing I/F
E16 E16
00: Capacity over
01 ~: No. of connected units
ll
¤
Capacity over / No. of connected indoor units I/F
E18 ——
¤
ll
Communication error between indoor units Indoor
E19 E19
00: Header is nothing
02: Two or more header units
ll
¤
Outdoor header units quantity error I/F
E20 E20
01: Outdoor of other line connected
02: Indoor of other line connected
ll
¤
Other line connected during automatic address I/F
E23 E23 —
ll
¤
Sending error in communication between outdoor
units
I/F
E25 E25 —
ll
¤
Duplicated follower outdoor addresses I/F
E26 E26
No. of outdoor units which received signal
normally
ll
¤
Decrease of No. of connected outdoor units I/F
E28 E28 Detected outdoor unit number
ll
¤
Follower outdoor unit error I/F
E31 E31
01: IPDU1 error
02: IPDU2 error
03: IPDU1, 2 error
04: Fan IPDU error
05: IPDU + Fan IPDU error
06: IPDU2 + Fan IPDU error
07: All IPDU error
ll
¤
IPDU communication error I/F