72
<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.
Continue to the next page
[Display]
(1)Normal condition
Unit condition
Outdoor controller board
A-Control Service Tool
LED1 (Green)
LED2 (Red)
Error code
Indication of the display
When the power is turned on
Lighted
Lighted
Alternately blinking display
When unit stops
Lighted
Not lighted
00, etc.
Operation mode
When compressor is warming up
Lighted
Not lighted
08, etc.
When unit operates
Lighted
Lighted
C5, H7, etc.
(2)Abnormal condition
Indication
Error
Outdoor controller
board
Contents
Check
code *1
Inspection method
Detailed
reference
page
LED1 (Green) LED2 (Red)
1 blinking 2 blinking Connector (63H) is open.
F5
1
Check if connector (63H) on the outdoor controller
board is not disconnected.
2
Check continuity of pressure switch (63H) by tester.
P.37
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
outdoor unit.
3
Check if noise entered into indoor/outdoor
connecting wire or power supply.
4
Re-check error by turning off power, and on
again.
P.38(EA)
Miswiring of indoor/outdoor unit
connecting wire (converse wiring or
disconnection)
–
P.38(Eb)
Startup time over
–
P.38(EC)
2 blinking Indoor/outdoor unit communication
error (signal receiving error) is
detected by in door unit.
E6
1
Check if indoor/outdoor connecting wire is
connected correctly.
2
Check if noise entered into indoor/outdoor
connecting 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.
P.44
Indoor/outdoor unit communication
error (transmitting error) is detected
by indoor unit.
E7
P.44
Indoor/outdoor unit communication
error (signal receiving error) is
detected by outdoor unit.
–
P.44(E8)
Indoor/outdoor unit communication
error (transmitting error) is detected
by outdoor unit.
–
P.44(E9)
3 blinking Remote controller signal receiving error is
detected by remote controller.
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
Re-check error by turning off power, and on
again.
P.43
Remote controller transmitting error
is detected by remote controller.
E3
P.44
Remote controller signal receiving
error is detected by indoor unit.
E4
P.43
Remote controller transmitting error
is detected by indoor unit.
E5
P.44
4 blinking
Abnormal if a connection of indoor unit
and outdoor unit which uses different
refrigerant is detected.
EE
Check if indoor/outdoor unit combination is
authorized.
P.45
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 connecting wire.
3
Re-check error by turning off power, and on again.
P.45
PL
1
Be sure to replace the 4-way valve.
2
Check refrigerant pipes for disconnection or
leakage.
3
After the recovery of refrigerant, vacuum dry the
whole refrigerant circuit.
4
Refer to “10-6. HOW TO CHECK THE PARTS”.
5
Check refrigerant circuit for operation.
P.46
5 blinking Serial communication error <Communication
between outdoor controller board and
outdoor power board>
<Communication between outdoor
controller board and M-NET P.C. board>
Ed
1
Check if connector (CN4) on outdoor controller
board and outdoor power board is not
disconnected.
2
Check if there is poor connection of connector on
outdoor controller board(CNMNT and CNVMNT).
3
Check M-NET communication signal.
P.45
Communication error of M-NET system A0–A8
P.46–P.48
*1.Check code displayed on remote controller
OCH653
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