Mitsubishi Electronics MSY-A24NA, MSY-A15NA Troubleshooting check table, Indicates abnormalities

Page 16

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 the following detection method has detected an abnormality (the first detection after the power ON), the indoor electronic control P.C. board turns OFF the indoor fan motor with OPERATION INDICATOR lamp flashing.

 

Lighted

·Flashing of OPERATION INDICATOR lamp (left-hand side lamp)

OPERATION INDICATOR

indicates abnormalities.

Blinking

 

 

 

Not lighted

 

No.

Abnormal

Operation indicator lamp

Symptom

Condition

Correspondence

 

point

 

 

 

 

 

 

Left lamp flashes.

Indoor unit

 

 

 

Mis-Wiring

0.5-second ON

 

• Refer to 8-6.D"How to check

 

 

and outdoor

The serial signal from the outdoor unit is not

1

or serial

 

mis-wiring and serial signal

 

unit do not

received for a maximum of 6 minutes.

 

signal

 

error".

 

 

operate.

 

 

 

 

 

 

 

 

0.5-second OFF

 

 

 

 

Outdoor

 

 

 

• Check the blinking pattern of

 

control

 

 

It cannot properly read data in the nonvolatile

 

system

 

Outdoor unit

the LED on the inverter P.C.

 

 

memory of the inverter P.C. board or the

2

MSZ-A09/12

Left lamp lights up

board or the outdoor

does not

outdoor electronic control P.C. board.

 

MSZ-A15/17

 

operate.

 

electronic

 

 

 

control P.C. board.

 

MSY-A15/17

 

 

 

 

 

 

 

 

 

Indoor coil

Left lamp flashes.

 

 

 

 

thermistor

 

 

 

 

2-time flash

Indoor unit

The indoor coil or the room temperature

• Refer to 8-7.the

 

 

3

 

 

and outdoor

thermistor is short or open circuit.

characteristics of indoor coil

Room

 

unit do not

 

thermistor, and the room

 

tempera-

2.5-second OFF

operate.

 

temperature thermistor.

 

ture

 

 

 

 

 

 

 

 

 

thermistor

 

 

 

 

 

 

Left lamp flashes.

Indoor unit

 

 

 

 

3-time flash

The rotational frequency feedback signal is

• Refer to 8-6.A"Check of

 

Indoor fan

 

and outdoor

4

 

not emitted during the indoor fan operation.

motor

 

unit do not

indoor fan motor".

 

 

 

 

 

 

operate.

 

 

 

 

2.5-second OFF

 

 

 

 

Indoor

Left lamp flashes.

Indoor unit

It cannot properly read data in the nonvolatile

 

 

4-time flash

 

 

and outdoor

• Replace the indoor electronic

5

control

 

memory of the indoor electronic control P.C.

 

unit do not

control P.C. board.

 

system

 

board.

 

 

operate.

 

 

 

2.5-second OFF

 

 

 

 

 

 

 

 

 

Left lamp flashes.

Indoor unit

It consecutively occurs 3 times that the

• Refer to "How to check of

 

Outdoor

5-time flash

 

inverter/ compressor".

6

power

 

and outdoor

compressor stops for overcurrent protection or

Refer to outdoor unit service

 

unit do not

start-up failure protection within 1 minute after

 

system

 

manual.

 

 

operate.

start-up.

 

 

2.5-second OFF

• Check the stop valve.

 

 

 

 

 

 

 

 

 

 

 

Left lamp flashes.

 

 

 

 

 

6-time flash

Indoor unit

The outdoor thermistors short or open circuit

• Refer to "Check of outdoor

 

Outdoor

 

and outdoor

thermistor".

7

 

unit do not

during the compressor operation.

Refer to outdoor unit service

thermistors

 

 

 

operate.

 

manual.

 

 

2.5-second OFF

 

 

 

 

 

 

 

 

Left lamp flashes.

Indoor unit

 

• Replace the inverter P.C.

 

Outdoor

7-time flash

It cannot properly read data in the nonvolatile

board or the outdoor

 

and outdoor

8

control

 

memory of the inverter P.C. board or the

electronic control P.C. board.

 

unit do not

 

system

 

outdoor electronic control P.C. board.

Refer to outdoor unit service

 

 

operate.

 

 

2.5-second OFF

 

manual.

 

 

 

 

 

 

Left lamp flashes.

Indoor unit

 

• Confirm the abnormality in

 

Other

14-time flash

An abnormality other than above mentioned is

9

 

and outdoor

detail using the failure mode

abnormality

 

unit do not

detected.

recall function for outdoor

 

 

2.5-second OFF

operate.

 

unit.

 

 

 

 

 

16

Image 16
Contents Contents Revised EDITION-ATechnical Changes MSZ-A24NA MSY-A24NA Accessories Part Names and FunctionsMSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSZ-A24NA MSY-A17NA MSY-A24NASpecification Operating Range Outlet AIR Speed and Coverage RangeMSZ-A09NA MSY-A15NA MSZ-A12NA MSY-A17NA MSZ-A15NA MSZ-A17NA Outlines and DimensionsUnit inch MSZ-A24NA Wiring Diagram Refrigerant System Diagram MSZ-A09NA MSZ-A12NAMSZ-A15NA MSY-A15NA MSZ-A17NA MSY-A17NAService Functions Timer Short ModeHow to modify the remote controller P.C. board P.C. Board Modification for Individual OperationAuto Restart Function TroubleshootingOperation Troubleshooting procedure How to replace batteriesInformation for Multi System AIR Conditioner Outdoor Unit MXZ seriesFailure mode recall function Those figures show about MSZ-A09/12/15/17Indoor unit failure mode table Instruction of troubleshooting OperationTroubleshooting check table Indicates abnormalitiesTrouble criterion of main parts MXZ typeTroubleshooting flow Check of indoor fan motorCheck of remote controller and receiver P.C. board Indoor electronic control P.C.Board How to check mis-wiring and serial signal error Electromagnetic noise enters into TV sets or radios Test point diagram and voltage Power monitor receiver P.C. boardIndoor electronic control P.C. board SW P.C. boardMSZ-A24NA MSY-24NA Display P.C. board Receiver BoardDisassembly Instructions Removing the panel PhotoOperating Procedure Photos Photo Removing the electrical boxRemoving the horizontal vane motor unit Photo Removing the indoor fan motor and the line flow PhotoFan Motor bandMSZ-A24NA MSY-A24NA Operating Procedure Photos Removing the front panelRemoving the electronic control P.C. board, the receiver Board and the display P.C. boardRemoving the vane motor Removing the line flow fan and the indoor fan motorParts List Accessory and Remote ControllerNozzle Assembly Switch HolderBearing Mount Sleeve BearingAIR Cleaning Filter ANTI-ALLERGY Enzyme Filter Front Panel Assembly CatchScrew CAP GrilleIndoor Unit Functional Parts and Electrical Parts AIR Cleaning Filter ANTI-ALLERGY Enzyme Filter Catechin AIR Filter Right AIR Cleaning Filter MAC-415FT-E RoHS Qty/unit Part nameE12 751 E12 A54 235RoHS Part name E12 A54 E12 A5610 G E12 888 007 Lamp Panel Diagram Symbol Wiring Qty/unit Remarks E1211 G E12 A58 620 Indoor Heat Exchanger E12 A58 300 Indoor FAN Motor Assembly W1 11 G E12 408 303 Vane Motor HorizontalMV2 MV1 Right & Left UP & DownAIR Cleaning Filter ANTI-ALLERGY Enzyme Filter Microprocessor Control Indoor Unit Display SectionCool Operation DRY OperationHeat Operation MSZ FAN d Operation MSYMode selection Auto Change Over ··· Auto Mode Operation MSZFuzzy control Auto Vane Operation MSZ-A09/12/15/17 MSY-A15/17MSZ-A24 MSY-A24 Upward3 4 Swing 5 COOL/DRY HeatTimer Operation Program TimerEMERGENCY/TEST Operation Made in Japan
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Manual 48 pages 11.54 Kb Manual 27 pages 7.37 Kb

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

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