Mitsubishi Electric PUZ-SWM60VAA Service Manual page 53

<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 abnormal-
ity can be indicated in details by connecting an optional part "A-Control Service Tool (PAC-SK52ST)" to connector CNM on out-
door 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) 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 (converse wiring
or disconnection)
Startup time over
2 blinking Indoor/outdoor unit communica-
tion error (signal receiving error) is
detected by indoor unit.
Indoor/outdoor unit communication
error (transmitting error) is detect-
ed by indoor unit.
Indoor/outdoor unit communica-
tion error (signal receiving error) is
detected by outdoor unit.
Indoor/outdoor unit communication
error (transmitting error) is detect-
ed by outdoor unit.
3 blinking Remote controller signal receiving
error is detected by remote control-
ler.
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 Check code is not defined.
Incorrect connection
5 blinking Serial communication error
<Communication between outdoor
controller board and outdoor power
board>
* Check code displayed on remote controller
** Refer to service manual for indoor unit.
OCH809A
Outdoor controller board
LED1 (Green) LED2 (Red)
Lit
Lit Not lit
Lit Not lit
Lit
Check
Contents
code*
F5
—
—
—
E6
E7
—
—
E0
E3
E4
E5
EF
EE
Ed
53
Check code
— —
Lit
00, etc.
08, etc.
Lit C5, H7, etc.
Error
Inspection method
Check if connector on the outdoor controller board is
not disconnected.
Check continuity of pressure switch by multimeter.
Check if indoor/outdoor connecting wire is connected
correctly.
Check if 4 or more indoor units are connected to out-
door 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.
3Re-check error by turning off power, and on again.
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.
Connect I/F or FTC to the unit.
Check if connector (CN4) on outdoor controller board
and outdoor power board is not disconnected.
A-Control Service Tool
Indication of the display
Alternately blinking display
Operation mode
Detailed
reference
page
P.26
P.26
(EA)
P.26
(Eb)
P.26
(EC)
P.32
P.32
P.33
(E8)
P.33
(E9)
P.31
P.31
P.31
P.31
P.33
P.26
P.33