70
OCH737
<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.
[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
*1
Inspection method
Detailed
reference
page
LED1
(Green)
LED2
(Red)
1 blinking
2 blinking
Connector (63H/TRS) is open.
F5
1
Check if connector (63H and TRS) on the
outdoor controller board is not disconnected.
2
Check continuity of pressure switch (63H)/
Thermal protector (TRS) by tester.
P.35
2 blinking
1 blinking
Miswiring of indoor/outdoor unit connecting
wire, excessive number of indoor units (5
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.36(EA)
Miswiring of indoor/outdoor unit connecting
wire (converse wiring or disconnection)
—
P.36(Eb)
Startup time over
—
P.36(EC)
2 blinking
Indoor/outdoor unit communication 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
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.42
Indoor/outdoor unit communication error
(transmitting error) is detected by indoor
unit.
E7
P.42
Indoor/outdoor unit communication error
(signal receiving error) is detected by
outdoor unit.
—
P.42(E8)
Indoor/outdoor unit communication error
(transmitting error) is detected by outdoor
unit.
—
P.42(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.41
Remote controller transmitting error
is detected by remote controller.
E3
P.41
Remote controller signal receiving
error is detected by indoor unit.
E4
P.41
Remote controller transmitting error
is detected by indoor unit.
E5
P.41
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.42
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.42
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.43
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.43
Communication error of M-NET
system
A0–A8
P.44 to
P.47