8-3. Instruction of troubleshooting

Start

Indoor unit operates. Outdoor unit doesn't operate.

Indoor unit operates. Outdoor unit doesn't operate normally.

Indoor unit doesn't receive the signal from remote controller.

OPERATION INDICATOR lamp on the indoor unit is flashing on and off.

Outdoor unit

 

Outdoor unit

operates only

 

doesn't

in Test Run

 

operate

operation.

 

even in

 

w

 

Test Run

 

 

 

operation.

 

 

 

 

w

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check room

 

Refer to

temperature

 

"How to check

thermistor.

 

inverter/

Refer to 8-7.

 

compressor".

"Test point

 

 

 

diagram and

 

 

 

voltage".

 

 

 

 

 

 

 

 

Unit doesn't

 

Indoor unit

 

operates, when

operate

 

 

EMERGENCY

normal

 

 

OPERATION

operation in

 

 

switch is pressed.

COOL or

 

 

 

 

HEAT mode.

 

 

 

 

 

 

 

 

 

 

 

 

 

Refer to

 

Refer to 8-6.B

"Check of

 

"Check of

R.V. coil".

 

remote controller

 

 

and receiver

 

 

P.C. board".

 

 

 

Indoor unit doesn't operate, when

EMERGENCY

OPERATION switch is pressed.

1.Check indoor / outdoor connecting wire. (Check if the power is supplied to the indoor unit.)

2.Refer to 8-6.C"Check of indoor electronic control P.C. board and indoor fan motor".

If blinking of OPERATION INDICATOR lamp cannot be checked, it can be checked with failure mode recall function.

w

"Test Run operation" means the operation within 30 minutes after EMERGENCY OPERATION switch is pressed.

Refer to outdoor unit service manual.

Left lamp

 

Left lamp

Flash on and off

 

2-time flash

at 0.5-second

 

Cause:

intervals

 

Indoor unit

Cause:

 

• Trouble of

Indoor/

 

room temp-

Outdoor unit

 

erature/

Mis-wiring

 

indoor coil

or trouble

 

thermistor

of serial signal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Refer to 8-6.

 

Check room

D "How to

 

temperature

check of

 

thermistor

mis-wiring

 

and indoor

and serial

 

coil thermis-

signal error".

 

tor.

 

 

 

Refer to 8-7.

 

 

 

"Test point

 

 

 

diagram and

 

 

 

voltage".

 

 

 

 

 

Left lamp

 

Left lamp

 

Left lamp

 

Left lamp

 

Left lamp

 

Left lamp

3-time flash

 

4-time flash

 

5-time flash

 

6-time flash

 

7-time flash

 

14-time flash

Cause:

 

Cause:

 

Cause:

 

Cause:

 

Cause:

 

Cause:

Indoor unit

 

Indoor unit

 

Outdoor unit

 

Outdoor unit

 

Outdoor unit

 

Outdoor unit

• Trouble of

 

• Trouble of

 

• Outdoor

 

• Trouble of

 

• Trouble of

 

• Other

indoor fan

 

indoor unit

 

power

 

thermistor

 

outdoor

 

abnormality

motor

 

control

 

system

 

in outdoor

 

control

 

 

 

 

 

 

system

 

abnormality

 

unit

 

system

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Refer to 8-6.

 

Replace the

 

Refer to

 

Refer to

 

Replace the

 

Check

A "Check of

 

indoor

 

"How to check

 

"Check of

 

inverter P.C.

 

"Flow chart of

indoor fan

 

electronic

 

inverter/

 

outdoor

 

board or

 

the detailed

motor".

 

control

 

compressor".

 

thermistors".

 

the outdoor

 

outdoor unit

 

 

P.C. board.

 

 

 

 

 

electronic

 

failure mode

 

 

 

 

 

 

 

 

control P.C.

 

recall function."

 

 

 

 

 

 

 

 

board.

 

 

 

 

 

 

 

 

 

 

 

 

 

15

Page 15
Image 15
Mitsubishi Electronics MSZ-A09NA, MSY-A24NA, MSY-A15NA, MSY-A17NA, MSZ-A17NA Instruction of troubleshooting, Operation

MSY-A15NA, MSZ-A09NA, MSZ-A17NA, MSZ-A12NA, MSZ-A24NA specifications

Mitsubishi Electronics is a renowned name in the HVAC (heating, ventilation, and air conditioning) industry, known for innovative, efficient air conditioning solutions. The MSY-A17NA, MSY-A24NA, MSZ-A15NA, MSZ-A24NA, and MSZ-A12NA models exemplify this legacy, offering advanced features and cutting-edge technology. These models cater to various room sizes and requirements, providing comfortable and reliable climate control.

The MSY-A series, including the MSY-A17NA and MSY-A24NA, is designed for both cooling and heating. They feature inverter technology, which optimizes energy use by adjusting compressor speed based on demand, resulting in significant energy savings. The units come equipped with high-performance filters that capture dust and allergens, ensuring cleaner air.

Additionally, the MSY models incorporate a quiet operation mode, making them ideal for residential use. The user-friendly remote control allows for easy adjustments, while the programmable timer adds convenience for scheduling operation times to align with the user's lifestyle. Both models are built with durability in mind, featuring rust-resistant cabinets and high-quality components that extend the lifespan of the unit.

On the other hand, the MSZ-A models, which include the MSZ-A15NA, MSZ-A24NA, and MSZ-A12NA, are wall-mounted indoor units that complement the MSY outdoor models. With their sleek design, they blend seamlessly into any interior decor. The MSZ-A units also utilize inverter technology, enhancing energy efficiency and providing fast cooling and heating performance.

One notable feature of the MSZ-A series is the advanced air purification system, which goes beyond standard filtration. It includes technologies that neutralize odors and harmful gases, creating a healthier indoor environment. The models also come with a quiet operation mode, making them suitable for bedrooms and other quiet spaces.

All Mitsubishi MSY and MSZ models have been built with proactive environmental considerations, complying with high energy efficiency standards. They contribute to lower electricity bills and reduced carbon footprints. Furthermore, their compact design ensures easy installation in various settings without sacrificing performance.

In summary, Mitsubishi Electronics' MSY-A17NA, MSY-A24NA, MSZ-A15NA, MSZ-A24NA, and MSZ-A12NA models stand out in the competitive HVAC market. With features like inverter technology, advanced air purification, and user-friendly controls, these air conditioners deliver outstanding performance, comfort, and reliability while promoting energy efficiency and sustainability.