Display Function Of Inspection For Outdoor Unit - Mitsubishi Electric PUHZ-SW40VHA Service Manual

Split-type, heat pump air conditioners
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<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.
Miswiring of I/F or FTC or outdoor unit
2 blinking 1 blinking
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)
Startup time over
I/F or FTC or outdoor unit communication
2 blinking
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.
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 I/F or FTC unit.
Remote controller transmitting error
is detected by I/F or FTC unit.
4 blinking
Error code is not defined.
*1 Error code displayed on remote controller
*2 Refer to Technical manual of ATW, I/F, FTC.
OCH525
Outdoor controller board
LED1 (Green)
LED2 (Red)
Lighted
Lighted
Not lighted
Lighted
Not lighted
Lighted
Contents
Error code
Lighted
00, etc.
08, etc.
Lighted
C5, H7 etc.
Error
Error
Inspection method
code
*1
Check if connector (63H) on the outdoor controller
board is not disconnected.
F5
Check continuity of pressure switch (63H) by tester.
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.
E6
Check if I/F or FTC or outdoor connecting wire is
connected correctly.
Check if noise entered into I/F or FTC or outdoor
connectingwire or power supply.
(E8)
Check if noise entered into I/F or FTC or outdoor
controller board.
(E9)
Re-check error by turning off power, and on again.
Check if connecting wire of I/F or FTC unit or remote
E0
controller is connected correctly.
Check if noise entered into transmission wire of remote
E3
controller.
Re-check error by turning off power, and on again.
E4
E5
Check if noise entered into transmission wire of remote
EF
controller.
Check if noise entered into I/F or FTC or outdoor
connecting wire.
Re-check error by turning off power, and on again.
44
A-Control Service Tool
Indication of the display
Alternately blinking display
Operation mode
Detailed
reference
page
P.15
P.22
P.21
P.22

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