8-4. TROUBLESHOOTING CHECK TABLE

Before taking measures, make sure that the symptom reappears for accurate troubleshooting.

When the indoor unit has started operation and detected an abnormality of the following condition (the first detection after the power ON), the indoor fan motor turns OFF and OPERATION INDICATOR lamp flashes.

OPERATION INDICATOR

Lighted

Blinking

 

 

Not lighted

 

 

 

 

No.

Abnormal

Operation indicator lamp

Symptom

Condition

Correspondence

point

 

 

 

 

 

 

 

 

Left lamp flashes.

 

 

 

 

 

Miswiring

0.5-second ON

 

 

• Refer to 8-6.

"How to check

 

 

 

The serial signal from the outdoor unit is not

1

or serial

 

 

miswiring and serial signal er-

 

 

received for 6 minutes.

 

signal

0.5-second OFF

 

ror".

 

 

 

 

 

 

 

 

 

 

 

 

Indoor coil

Left lamp flashes.

 

 

 

 

 

2-time flash

 

 

• Refer to 8-7. the characteristics

 

thermistor

 

 

 

 

 

The indoor coil or the room temperature ther-

2

 

 

 

of indoor coil thermistor, and

Room tem-

 

 

mistor is short or open circuit.

the room temperature thermis-

 

 

 

 

perature

2.5-second OFF

 

 

tor.

 

 

thermistor

 

 

 

 

 

 

 

Left lamp flashes.

 

 

 

 

 

 

3-time flash

 

 

 

 

3

Indoor fan

 

 

The rotational frequency feedback signal is

• Refer to 8-6.

"Check of in-

motor

 

 

not emitted during the indoor fan operation.

door fan motor".

 

2.5-second OFF

 

 

 

 

 

 

 

 

 

Left lamp flashes.

 

 

 

 

 

 

4-time flash

 

It cannot properly read data in the nonvolatile

 

 

4

Indoor con-

 

 

• Replace the indoor electronic

 

 

memory of the indoor electronic control P.C.

trol system

 

 

control P.C. board.

 

2.5-second OFF

 

board.

 

 

 

 

 

 

 

Indoor unit and

 

 

 

 

 

 

 

 

 

 

 

Left lamp flashes.

outdoor unit do

 

 

 

 

 

not operate.

 

• Refer to "How to check of in-

 

 

5-time flash

 

It consecutively occurs 3 times that the com-

 

Outdoor

 

 

verter/compressor".

 

 

 

pressor stops for overcurrent protection or

5

power sys-

 

 

Refer to outdoor unit service

 

 

start-up failure protection within 1 minute after

 

tem

 

 

manual

 

 

2.5-second OFF

 

start-up.

 

 

 

 

• Check the stop valve.

 

 

Left lamp flashes.

 

 

 

 

 

Outdoor

6-time flash

 

The outdoor thermistors short or open circuit

• Refer to "Check of outdoor

6

 

 

thermistor".

 

thermistors

 

 

during the compressor operation.

Refer to outdoor unit service

 

 

2.5-second OFF

 

 

manual.

 

 

 

Left lamp flashes.

 

 

• Replace the inverter P.C. board

 

Outdoor

7-time flash

 

It cannot properly read data in the nonvolatile

7

 

 

or the outdoor electronic con-

control sys-

 

 

memory of the inverter P.C. board or the out-

trol P.C. board.

 

tem

2.5-second OFF

 

door electronic control P.C. board.

Refer to outdoor unit service

 

 

 

 

manual.

 

 

 

Left lamp flashes.

 

 

 

 

 

Other ab-

14-time flash

 

An abnormality other than above mentioned

• Check the stop valve.

8

 

 

• Confirm the abnormality in

normality

 

 

is detected.

detail using the failure mode

 

 

2.5-second OFF

 

 

recall function for outdoor unit.

 

 

 

 

 

 

 

Outdoor

 

 

 

 

 

 

control

 

Outdoor unit

It cannot properly read data in the nonvolatile

• Check the blinking pattern of

 

system

 

 

 

the LED on the inverter P.C.

9

MSZ-A09/12

Left lamp lights up

does not oper- memory of the inverter P.C. board or the out-

board or the outdoor electronic

 

/15/17

 

ate

door electronic control P.C. board.

control P.C. board.

 

MSY-A15/17

 

 

 

 

 

16

Page 15 Page 17
Page 16
Image 16
Logitech OB450 REVISED EDITION-B, MSZ-A09NA service manual Troubleshooting Check Table, 15/17
Page 15 Page 17

MSZ-A09NA, OB450 REVISED EDITION-B specifications

The Logitech MSZ-A09NA, OB450 Revised Edition-B stands as a testament to professional-grade technology, designed for both home and office productivity. This advanced device combines functionality with sleek design, making it an essential tool for users demanding efficiency and performance.

At its core, the Logitech MSZ-A09NA is equipped with state-of-the-art input technologies that enhance user experience. Whether you are a gamer, an avid typist, or a creative professional, this model caters to diverse needs. The mouse features an ergonomic shape that allows for hours of comfortable use, while the advanced optical sensor ensures precision tracking on various surfaces.

One of its standout features is the customizable button layout. Users can program each of the additional buttons to suit specific tasks, making it an ideal choice for gamers who require quick access to critical commands or professionals who benefit from application shortcuts. The mouse supports multiple profiles, allowing for seamless transitions between different user preferences.

Connectivity is another significant strength of the Logitech MSZ-A09NA. The device offers both wired and wireless options, ensuring versatility for any setup. The wireless connection is powered by Logitech’s advanced technology, providing a reliable link without the clutter of cables. With a battery life that can last weeks on a single charge, this mouse eliminates the need for frequent interruptions.

Moreover, the OB450 Revised Edition-B features RGB lighting that can be customized through Logitech’s software. This not only enhances aesthetic appeal but also allows users to create personalized lighting effects that can match their workspace or reflect their personal style.

Durability is a hallmark of the Logitech MSZ-A09NA, built with high-quality materials that can withstand extensive daily use. The mouse buttons have been rigorously tested to ensure they stand the test of time, making it a worthy investment for any user.

In summary, the Logitech MSZ-A09NA, OB450 Revised Edition-B excels in providing a blend of comfort, customization, and connectivity. Its thoughtful design and advanced technology make it an exceptional choice for anyone looking to enhance their computing experience. Whether for professional work, gaming, or everyday tasks, this mouse is equipped to meet the demands of modern users, offering both reliability and style.
Top Page Image Contents