Display Function Of Inspection For Outdoor Unit - Mitsubishi Electric Mr.SLIM PUZ-ZM200YKA Service Manual

<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
When the power is turned on
When unit stops
When compressor is warming up
When unit operates
(2)Abnormal condition
Indication
Outdoor controller board
LED1 LED2
(Green) (Red)
1 blinking 2 blinking Connector (63H/TRS) is open.
2 blinking 1 blinking Miswiring of indoor/outdoor unit connecting
wire, excessive number of indoor units (5
units or more)
Miswiring of indoor/outdoor unit connecting
wire (converse wiring or disconnection)
Startup time over
2 blinking Indoor/outdoor unit communication error
(signal receiving error) is detected by indoor
unit.
Indoor/outdoor unit communication error
(transmitting error) is detected by indoor
unit.
Indoor/outdoor unit communication error
(signal receiving error) is detected by
outdoor unit.
Indoor/outdoor unit communication error
(transmitting error) is detected by outdoor
unit.
3 blinking 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 indoor unit.
Remote controller transmitting error
is detected by indoor unit.
4 blinking Abnormal if a connection of
indoor unit and outdoor unit
which uses different refrigerant
is detected.
Check code is not defined.
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>
Communication error of M-NET
system
OCH738
Outdoor controller board
LED1 (Green) LED2 (Red)
Lit Lit
Lit Not lit
Lit Not lit
Lit Lit
Contents
A-Control Service Tool
Check code
00, etc.
08, etc.
C5, H7, etc.
Error
Check
code Inspection method
*1
1 Check if connector (63H and TRS) on the
outdoor controller board is not disconnected.
F5
2 Check continuity of pressure switch (63H)/
Thermal protector (TRS) by tester.
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.
1 Check if indoor/outdoor connecting wire is
E6 connected correctly.
2 Check if noise entered into indoor/outdoor
connecting wire or power supply.
3 Check if noise entered into indoor/outdoor
E7
controller board.
4 Re-check error by turning off power, and on
again.
—
—
1 Check if connecting wire of indoor unit or remote
E0
controller is connected correctly.
2 Check if noise entered into transmission wire of
E3
remote controller.
3 Re-check error by turning off power, and on
E4
again.
E5
Check if indoor/outdoor unit combination is
authorized.
EE
1 Check if noise entered into transmission wire of
remote controller.
2 Check if noise entered into indoor/outdoor
EF
connecting wire.
3 Re-check error by turning off power, and on
again.
1 Be sure to replace the 4-way valve.
2 Check refrigerant pipes for disconnection or
leakage.
PL
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.
1 Check if connector (CN4) on outdoor controller
board and outdoor power board is not
disconnected.
Ed
2 Check if there is poor connection of connector on
outdoor controller board(CNMNT and CNVMNT).
3 Check M-NET communication signal.
A0–A8
70
Indication of the display
Alternately blinking display
Operation mode
Detailed
reference
page
P.35
P.36(EA)
P.36(Eb)
P.36(EC)
P.42
P.42
P.42(E8)
P.42(E9)
P.41
P.41
P.41
P.41
P.42
P.42
P.43
P.43
P.44 to
P.47