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

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 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

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Contents Contents Revised EDITION-CMSZ-A24NA MSY-A24NAAccessories Part Names and FunctionsMSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSY-A17NA MSZ-A24NA MSY-A24NASpecification Operating Range Outlet AIR Speed and Coverage RangeOutlines and Dimensions MSZ-A09NA MSY-A15NAMSZ-A12NA MSY-A17NA MSZ-A15NA MSZ-A17NA Unit inchMSZ-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 OperationTroubleshooting How to release Auto Restart FunctionAuto Restart Function OperationTroubleshooting procedure How to replace batteriesInformation for Multi System AIR Conditioner Outdoor Unit MXZ seriesFailure Mode Recall Function Indoor unit failure mode table Instruction of Troubleshooting StartTroubleshooting Check Table 15/17Trouble Criterion of Main Parts MXZ typeTroubleshooting Flow Check of indoor fan motorMSZ-A24NA MSY-A24NA MSZ-A09/12/15/17NA MSY-A15/17NAIndoor electronic control P.C.Board How to check miswiring 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 Removing the electrical box PhotoRemoving the horizontal vane motor unit Photo Removing the indoor fan motor and the line flow fan PhotoMSZ-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 Power Monitor Receiver Board HolderRoom Temperature Switch HolderAIR Cleaning Filter ANTI-ALLERGY Enzyme Filter Indoor Heat ExchangerUnion GAS Union LiquidSee Indoor Unit Functional Parts and Electrical Parts MAC-2300FT Catechin AIR Filter Right AIR Cleaning MAC-415FT-E MSZ-A MSY-ARemote KM06C Controller KM07LCover ElectronicControl P.C Indoor CoilIndoor Heat ExchangerE12 815 E12 155 Ø1/2 E12 151Catch Screw CAPCatechin AIR Filter PC/ SETAssembly Remote Controller KM06DVane Motor Vertical Vane Motor HorizontalAIR Cleaning Filter ANTI-ALLERGY Enzyme Filter Microprocessor Control Indoor Unit Display SectionCool Operation DRY OperationHeat Operation MSZ FAN 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 UpwardVertical vane MSZ-A24, MSY-A24 3 4 Swing 5Timer Operation Program TimerChanging temperature indication F/C EMERGENCY/TEST OperationMSZ-ANA- MSY-ANA Made in Japan

MSZ-A09NA, OB450 REVISED EDITION-B specifications

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