50
OCH756
[Display]
(1) Normal condition
Unit condition
Outdoor controller board
A-Control Service Tool
LED1 (Green)
LED2 (Red)
Check code
Indication of the display
When the power is turned on
Lit
Lit
—
⇔
—
Alternately blinking display
When unit stops
Lit
Not lit
00, etc.
Operation mode
When compressor is warming up
Lit
Not lit
08, etc.
When unit operates
Lit
Lit
C5, H7, etc.
(2) Abnormal condition
Indication
Error
Outdoor controller board
Contents
Check
code*
Inspection method
Detailed
reference
page
LED1
(Green)
LED2
(Red)
1 blinking 2 blinking Connector(63H) is open.
F5
1
Check if connector on the outdoor controller board is
not disconnected.
2
Check continuity of pressure switch by multimeter.
P.23
2 blinking 1 blinking Miswiring of indoor/outdoor unit
connecting wire, excessive number
of indoor units (4 units or more)
—
1
Check if indoor/outdoor connecting wire is connected
correctly.
2
Check if 4 or more indoor units are connected to out-
door unit.
3
Check if noise entered into indoor/outdoor connect-
ing wire or power supply.
4
Re-check error by turning off power, and on again.
P.23
(EA)
Miswiring of indoor/outdoor unit
connecting wire (converse wiring
or disconnection)
—
P.23
(Eb)
Startup time over
—
P.23
(EC)
2 blinking Indoor/outdoor unit communica-
tion error (signal receiving error) is
detected by indoor unit.
E6
1
Check if indoor/outdoor connecting wire is connected
correctly.
2
Check if noise entered into indoor/outdoor connect-
ing wire or power supply.
3
Check if noise entered into indoor/outdoor controller
board.
4
Re-check error by turning off power, and on again.
**
Indoor/outdoor unit communication
error (transmitting error) is detect-
ed by indoor unit.
E7
**
Indoor/outdoor unit communica-
tion error (signal receiving error) is
detected by outdoor unit.
—
P.29
(E8)
Indoor/outdoor unit communication
error (transmitting error) is detect-
ed by outdoor unit.
—
P.29
(E9)
3 blinking Remote controller signal receiving
error is detected by remote control-
ler.
E0
1
Check if connecting wire of indoor unit or remote
controller is connected correctly.
2
Check if noise entered into transmission wire of
remote controller.
3
3Re-check error by turning off power, and on again.
P.28
Remote controller transmitting error
is detected by remote controller.
E3
P.28
Remote controller signal receiving
error is detected by indoor unit.
E4
P.28
Remote controller transmitting error
is detected by indoor unit.
E5
P.28
4 blinking Check code is not defined.
EF
1
Check if noise entered into transmission wire of
remote controller.
2
Check if noise entered into indoor/outdoor connect-
ing wire.
3
Re-check error by turning off power, and on again.
P.29
Incorrect connection
EE
1
Connect I/F or FTC to the unit.
P.23
5 blinking Serial communication error
<Communication between outdoor
controller board and outdoor power
board>
Ed
1
Check if connector (CN4) on outdoor controller board
and outdoor power board is not disconnected.
P.29
* Check code displayed on remote controller
** Refer to service manual for indoor unit.
<Display function of inspection for outdoor unit>
The blinking patterns of both LED1 (green) and LED2 (red) indicate the types of abnormality when it occurs. Types of abnormal-
ity can be indicated in details by connecting an optional part “A-Control Service Tool (PAC-SK52ST)” to connector CNM on out-
door controller board.
