Mitsubishi Electric PUZ-WZ50VAA Service Manual page 59

<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 abnor-
mality can be indicated in detail by connecting an optional part "A-Control Service Tool (PAC-SK52ST)" to connector CNM on
outdoor controller board.
The blinking patterns are applied excepted for abnormality of Fixed compressor circuit.
[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(63L) is open.
Connector(63H) is open.
2 connectors are open.
Miswiring of indoor/outdoor unit conne-
2 blinking 1 blinking
cting wire, excessive number of indoor
units (4 units or more)
Miswiring of indoor/outdoor unit co-
nnecting wire (converse wiring or di-
sconnection)
Startup time over
Indoor/outdoor unit communication error
2 blinking
(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
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.
OCH816
Outdoor controller board
LED1 (Green) LED2 (Red)
Lit
Lit
Lit
Lit
Check
Contents
code*
F3
F5
F9
—
—
—
E6
E7
—
—
E0
E3
E4
E5
EF
EE
Ed
59
Check code
Lit
Not 00, etc.
Not 08, etc.
Lit C5, H7, etc.
Error
Inspection method
1Check if connector (63H or 63L) on the outdoor controller
board is not disconnected.
2Check continuity of pressure switch (63H or 63L) by tester.
1Check if indoor/outdoor connecting wire is connected correctly.
2Check if 4 or more indoor units are connected to outdoor unit.
3Check if noise entered into indoor/outdoor connecting wire
or power supply.
4Re-check error by turning off power, and on again.
1Check if indoor/outdoor connecting wire is connected correctly.
2Check if noise entered into indoor/outdoor connecting wire or
power supply.
3Check if noise entered into indoor/outdoor controller board.
4Re-check error by turning off power, and on again.
1Check if connecting wire of indoor unit or remote controller
is connected correctly.
2Check if noise entered into transmission wire of remote
controller.
3Re-check error by turning off power, and on again.
1Check if noise entered into transmission wire of remote controller.
2Check if noise entered into indoor/outdoor connecting wire.
3Re-check error by turning off power, and on again.
1Connect I/F or FTC to the unit.
1Check 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.32
**
P.33
(EA)
P.33
(Eb)
P.33
(EC)
**
**
P.40
(E8)
P.40
(E9)
P.38
P.39
P.38
P.39
P.40
P.33
P.40