Mitsubishi Electronics MSZ-FA35VA, MSZ-FA25VA service manual Instruction of troubleshooting, Start

Page 17
POWER lamp POWER lamp POWER lamp Left lamp

9-3. Instruction of troubleshooting

Start

w"Test Run operation"

If blinking of OPERATION

means the operation

INDICATOR lamp cannot

within 30 minutes after

be checked, it can be checked

EMERGNCY OPERATION

with failure mode recall function.

switch is pressed.

 

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.

OPERATION INDICATOR lamp on the indoor unit stays off.

Outdoor unit

 

Outdoor unit

operates in

 

doesn't

only Test Run

 

operate

operation. w

 

even in

 

 

 

Test Run

 

 

 

operation. w

 

 

 

 

 

 

 

 

 

 

Check room

 

Refer to

temperature

 

"How to check

thermistor.

 

inverter/

Refer to 9-7.

 

compressor".

"Test point

 

 

diagram and

 

 

voltage".

 

 

 

 

 

Unit doesn't

 

Indoor unit

operate

 

operates, when

normal

 

EMERGENCY

operation in

 

OPERATION

COOL or

 

switch is pressed.

HEAT mode.

 

 

 

 

 

 

 

 

 

 

 

 

 

Refer to

 

Refer to 9-6.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 9-6.C"Check of indoor electronic control P.C. board and indoor fan motor".

PLASMA/WASH lamp 2-time flash

cause: Indoor unit

Trouble of PLASMA DEODORIZNG power control or PLASMA AIR PURIFYING power control

Replace the indoor electronic control P.C. board.

As for outdoor unit MUZ type, refer to service manual OB372. As for outdoor unit MXZ type, refer to service manual OB377.

All lamps

 

Flash on and off

2-time flash

Flash on and off

 

at 0.5-second

 

at 0.5-second

Cause:

intervals

 

intervals

Indoor unit

Cause:

 

Cause:

• Trouble of

Indoor unit

 

Indoor/

room temp-

• The horizontal

 

Outdoor unit

erature/

vane is not

 

Mis-wiring

indoor coil

installed

 

or trouble

thermistor

correctly.

 

of serial signal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Refer to 9-6.

 

Refer to 9-6.

Check room

E "Check of

 

D "How to

temperature

installation of

 

check of

thermistor

the horizontal

 

mis-wiring

and indoor

vane".

 

and serial

coil thermis-

 

 

 

signal error

tor.

 

 

 

(when

Refer to 9-7.

 

 

 

outdoor unit

"Test point

 

 

 

doesn't work)".

diagram and

 

 

 

 

 

voltage".

 

 

 

 

 

 

 

 

 

 

 

 

POWER lamp

 

POWER lamp

POWER lamp

POWER lamp

3-time flash

of AREA lamp

 

5-time flash

 

6-time flash

7-time flash

14-time flash

Cause:

4-time flash

 

Cause:

 

Cause:

Cause:

Cause:

Indoor unit

Cause:

 

Outdoor unit

 

Outdoor unit

Outdoor unit

Outdoor unit

• Trouble of

Indoor unit

 

• Outdoor

 

• Trouble of

• Trouble of

• Other

indoor fan

• Trouble of

 

power

 

thermistor

outdoor

abnormality

motor

indoor unit

 

system

 

in outdoor

control

 

 

 

 

control

 

abnormality

 

unit

system

 

 

 

 

system

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Refer to 9-6.

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.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

17

Image 17
Contents MSZ-FA25VA E1 MSZ-FA35VA E1 ContentsFront panel opening/closing output gear Technical ChangesGeneralized stepping motor Part Names and Functions Wash reset switch Open Closed Receiving sectionIndoor Unit MSZ-FA25VA MSZ-FA35VA See control operationRemote Controller MSZ-FA25VA E1 MSZ-FA35VA E1 AccessoriesWhen outdoor unit is MXZ type SpecificationSpecifications and rating conditions of main electric parts MSZ-FA35VA E1 Noise Criteria CurvesMSZ-FA25VA E1 MSZ-FA25VA E1 MSZ-FA35VA E1 Outlines and DimensionsIndoor Unit Unit mmRefrigerant System Diagram Wiring DiagramMSZ-FA25VA E1 Indoor Unit MSZ-FA35VA E1 Indoor UnitHow to modify the remote controller P.C. board Service FunctionsRemote controller model KM05A OperationRemote controller Troubleshooting Remove InstallOutdoor Unit MXZ series Information for Multi System AIR ConditionerOFF Failure mode recall functionTo identify the error.Refer to 9-6.For G Plasma Deodorizing Indoor unit failure mode tablePlasma AIR Purifying OFFStart Instruction of troubleshooting· Flashing of Power lamp indicates abnormalities Troubleshooting check tablePurifying PlasmaAIR Trouble criterion of main parts Check of indoor fan motor Troubleshooting flowWhen Power lamp flashes 3-time Indoor fan does not operate Check of remote controller and receiver P.C. board Indoor electronic control P.C.Board LED How to check mis-wiring and serial signal errorCheck of installation of the horizontal vane Plasma Deodorizing 0V? Safety Deviceplasma UnitAIR Purifying 0V? Continuously flash?Indoor unit and outdoor unit do not operate Check of auto front panelYes Electromagnetic noise enters into TV sets or radiosPower monitor receiver P.C. board Test point diagram and voltagePlasma power P.C. board Indoor electronic control P.C. boardRemoving the panel Photo Disassembly InstructionsRemoving the electrical box Operating Procedure PhotosRemoving the vertical vane motor unit Photo Removing the horizontal vane motor unit PhotoRemoving the indoor fan motor and the line flow Photo FanRemoving the plasma power P.C. board Photo Accessory and Remote Controller Parts ListIndoor Unit Electrical Parts and Functional Parts Safety PlasmaIndoor Unit Heat Exchanger Motor Receiver P.C Board HolderDiagram E02 Symbol Qty/unit Part name Wiring509 504Deodorizing Ceramic Filter Optional PartsPage Specifications subject to change without notice