Display Function Of Inspection For Outdoor Unit; Normal Condition; Abnormal Condition - Mitsubishi Electric PUHZ-SHW230YKA2 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 abnor-
mality 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(63L) is open.
Connector(63H) is open.
2 connectors are 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 (reverse 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
Check code is not defined.
* 1 Check code displayed on remote controller
* 2 Refer to Technical manual of ATW, I/F, FTC.
OCH594B
Outdoor controller board
LED1 (Green) LED2 (Red)
Lit
Lit
Lit
Lit
Check
Contents
code
(E8)
(E9)
41
Check code
Lit
Not lit 00, etc.
Not lit 08, etc.
Lit C5, H7, etc.
Error
Inspection method
*
1
F3
1Check if connector (63H or 63L) on the outdoor controller
board is not disconnected.
F5
2Check continuity of pressure switch (63H or 63L) by tester.
F9
—
1Check if I/F or FTC or outdoor connecting wire is connected
correctly.
2Check if 4 or more I/F or FTC units are connected to
—
outdoor unit.
3Check if noise entered into I/F or FTC or outdoor connecting
wire or power supply.
—
4Re-check error by turning off power, and on again.
E6 1Check if I/F or FTC or outdoor connecting wire is connected
correctly.
2Check if noise entered into I/F or FTC or outdoor connecting
—
wire or power supply.
3Check if noise entered into I/F or FTC or outdoor controller
—
board.
4Re-check error by turning off power, and on again.
1Check if connecting wire of I/F or FTC unit or remote controller
E0
is connected correctly.
2Check if noise entered into transmission wire of remote
E3
controller.
3Re-check error by turning off power, and on again.
E4
E5
1Check if noise entered into transmission wire of remote
EF
controller.
2Check if noise entered into I/F or FTC or outdoor connecting
wire.
3Re-check error by turning off power, and on again.
A-Control Service Tool
Indication of the display
Alternately blinking display
Operation mode
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