Service manual
44
<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
abnormality can be indicated in details by connecting an optional part ‘A-Control Service Tool (PAC-SK52ST)’ to connector
CNM on outdoor controller board.
F5
—
—
—
E6
—
(E8)
—
(E9)
E0
E3
E4
E5
EF
[Display]
(1)Normal condition
(2)Abnormal condition
Unit condition
Outdoor controller board A-Control Service Tool
LED1 (Green) LED2 (Red) Error code
When the power is turned on
When unit stops
When compressor is warming up
When unit operates
Lighted Lighted
Lighted
Lighted
Lighted
Not lighted
Indication of the display
Alternately blinking display
Operation mode
Not lighted
Lighted
00, etc.
08, etc.
C5, H7 etc.
Indication Error
Error
code
*1
Outdoor controller board
Contents Inspection method
LED1 (Green) LED2 (Red)
1 blinking 2 blinking
2 blinking 1 blinking
2 blinking
3 blinking
4 blinking
Connector (63H) is open.
Startup time over
Error code is not defined.
Miswiring of I/F or FTC or outdoor unit
connecting wire, excessive number of
indoor units (4 units or more)
Miswiring of I/F or FTC or outdoor unit
connecting wire (converse wiring or
disconnection)
I/F or FTC or outdoor unit communication
error (signal receiving error) is detected by
FTC unit.
I/F or FTC or outdoor unit communication
error (signal receiving error) is detected by
outdoor unit.
I/F or FTC or outdoor unit communication
error (transmitting error) is detected by
outdoor unit.
Remote controller signal receiving
error is detected by remote controller.
Remote controller transmitting error
is detected by remote controller.
Remote controller signal receiving
error is detected by I/F or FTC unit.
Remote controller transmitting error
is detected by I/F or FTC unit.
*1 Error code displayed on remote controller
*2 Refer to Technical manual of ATW, I/F, FTC.
Check if I/F or FTC or outdoor connecting wire is
connected correctly.
Check if 4 or more I/F or FTC units are connected to
outdoor unit.
Check if noise entered into I/F or FTC or outdoor
connecting
wire or power supply.
Re-check error by turning off power, and on again.
Check if connector (63H) on the outdoor controller
board is not disconnected.
Check continuity of pressure switch (63H) by tester.
Check if noise entered into transmission wire of remote
controller.
Check if noise entered into I/F or FTC or outdoor
connecting
wire.
Re-check error by turning off power, and on again.
Check if connecting wire of I/F or FTC unit or remote
controller is connected correctly.
Check if noise entered into transmission wire of remote
controller.
Re-check error by turning off power, and on again.
Check if I/F or FTC or outdoor connecting wire is
connected correctly.
Check if noise entered into I/F or FTC or outdoor
connecting
wire or power supply.
Check if noise entered into I/F or FTC or outdoor
controller board.
Re-check error by turning off power, and on again.
P. 15
P. 22
P. 22
P. 21
Detailed
reference
page
OCH525