Mitsubishi Electric PUZ-ZM200YKA2-ET Service Manual page 78

<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 (Green) LED2 (Red)
1 blinking 2 blinking Connector (63H) is open.
2 blinking 1 blinking Miswiring of indoor/outdoor unit
connecting wire, excessive number
of indoor units (4 units or more)
Miswiring of indoor/outdoor unit connecting wire
(reversed 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
*1.Check code displayed on remote controller
OCH771C
Outdoor controller board
LED1 (Green) LED2 (Red)
Lit
Lit Not lit
Lit Not lit
Lit
Check
Contents
code *1
F5
–
–
–
E6
E7
–
–
E0
E3
E4
E5
EE
EF
PL
Ed
A0–A8
A-Control Service Tool
Check code
Lit
00, etc.
08, etc.
Lit C5, H7, etc.
Error
Inspection method
Check if connector (63H) on the outdoor
controller board is not disconnected.
Check continuity of pressure switch (63H)/Thermal
protector (TRS) by tester.
Check if indoor/outdoor connecting wire is
connected correctly.
Check if 4 or more indoor units are connected to
outdoor unit.
Check if noise entered into indoor/outdoor
connecting wire or power supply.
Re-check error by turning off power, and on again.
Check if indoor/outdoor connecting wire is
connected correctly.
Check if noise entered into indoor/outdoor
connecting wire or power supply.
Check if noise entered into indoor/outdoor
controller board.
Re-check error by turning off power, and on
again.
Check if connecting wire of indoor 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 indoor/outdoor unit combination is
authorized.
Check if noise entered into transmission wire of remote controller.
Check if noise entered into indoor/outdoor connecting wire.
Re-check error by turning off power, and on again.
Be sure to replace the 4-way valve.
Check refrigerant pipes for disconnection or leakage.
After the recovery of refrigerant, vacuum dry the
whole refrigerant circuit.
Refer to "10-5.HOW TO CHECK THE PARTS".
Check refrigerant circuit for operation.
Check if connector (CN4) on outdoor controller
board and outdoor power board is not
disconnected.
Check if there is poor connection of connector on
outdoor controller board(CNMNT and CNVMNT).
Check M-NET communication signal.
78
Indication of the display
Alternately blinking display
Operation mode
Detailed
reference
page
P. 40
P. 41
(EA)
P. 41
(Eb)
P. 41
(EC)
P. 47
P. 47
P. 47
(E8)
P. 48
(E9)
P. 46
P. 47
P. 46
P. 47
P. 48
P. 48
P. 49
P. 48
P. 50
–P. 53