Mitsubishi Electronics MSZ-FD35VA, MSZ-FD25VA How to check miswiring and serial signal error

Page 31

Unit cannot operate neither by the remote controller nor by EMERGENCY OPERATION switch. Indoor unit does not operate.

POWER lamp flashes ON and OFF every 0.5-seconds. Outdoor unit does not operate.

D How to check miswiring and serial signal error

A

·Turn OFF inverter-controlled lighting equipment.

·Turn OFF the power supply and then turn ON again.

·Press EMERGENCY OPERATION switch.

Turn OFF the power supply.

 

 

 

 

Is there rated voltage

 

 

 

 

 

 

 

 

Check the power

 

 

 

 

 

 

 

 

 

 

 

 

in the power supply?

 

 

No

 

 

 

 

 

supply.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Turn ON the power supply.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is there rated voltage between

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check the wiring.

 

 

 

 

 

 

 

 

 

 

 

outdoor terminal block S1 and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S2?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Press EMERGENCY OPERATION switch once.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Does AREA-L lamp light up?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

<Confirmation of the power to the indoor unit>

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

Is there any miswiring,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is serial signal error indicated 6 minutes later?

 

 

 

 

 

poor contact, or wire

Yes

 

 

 

 

 

 

No

disconnection of the

 

 

 

 

Correct them.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

indoor/outdoor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

connecting wire?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Turn OFF the power supply.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check once more if the indoor/outdoor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B

connecting wire is not miswiring.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Short-circuit outdoor terminal block S2 and

 

 

W1. Miswiring may damage indoor electronic control

 

 

 

S3.

 

 

 

 

 

 

P.C. board during the operation.

 

 

 

 

 

 

W1

 

 

 

 

 

 

Be sure to confirm the wiring is correct before the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

operation starts.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

W3. Be sure to check this within 3 minutes after turning

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON. After 3 minutes, LED blinks 6 times. Even when

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Turn ON the power supply.

 

 

 

 

 

 

the inverter P.C.board or the outdoor electronic control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P.C.board is normal, LED blinks 6 times after

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3 minutes.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Except for outdoor unit of multi system type)

 

 

Does the LED on the inverter P.C. board

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

Replace the inverter P.C. board or

 

 

 

 

or the outdoor electronic control P.C.board

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the outdoor electronic control P.C.board.

 

 

 

repeat "3.6-second-OFF and 0.8-second-ON (Lighted or

 

 

 

 

W2

 

 

 

 

 

 

 

 

 

quick blinking"? W3

 

 

 

not lighted)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

W2 Be careful to the residual

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

voltage of smoothing capacitor.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Turn OFF the power supply.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Remove the short-circuit between

 

 

 

 

 

 

Is there any error of the

 

 

 

 

 

 

 

 

 

 

outdoor terminal block S2 and S3.

 

 

 

 

 

 

indoor/outdoor connecting wire,

 

 

 

 

Replace the

 

 

 

Turn ON the power supply.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

such as the damage of the wire,

 

 

 

 

indoor/outdoor

 

 

 

Is there amplitude of 10 to 20 VDC

 

 

 

 

 

 

 

Yes

 

 

 

 

No

 

intermediate connection, poor

 

connecting wire.

 

 

 

between outdoor terminal block S2

 

 

 

 

 

 

 

 

 

and S3? <Confirmation of serial

 

 

 

 

 

 

contact to the terminal block?

 

 

 

 

 

 

 

 

 

 

signal>

 

 

 

 

 

 

 

 

 

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is there any error of the

 

 

 

 

 

 

 

 

 

 

Is there rated voltage between

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

indoor/outdoor connecting wire,

 

 

 

 

Replace the

 

 

 

indoor terminal block S1 and S2?

 

 

 

 

 

 

such as the damage of the wire,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is serial signal

error indicated 6 minutes later? No

Yes

B

·Reinstall either the unit or the light each other away.

·Attach a filter on remote control receiving section of the indoor unit.

<Confirmation of power voltage>

No intermediate connection, poor

Yes

indoor/outdoor

connecting wire.

 

contact to the terminal block?

 

Yes

 

 

 

 

 

 

No

 

 

Replace the indoor electronic control P.C. board.

Be sure to release the failure-mode recall function after checking.

31

Image 31
Contents MSZ-FD25VA E1 MSZ-FD25VAS E1 MSZ-FD35VA E1 MSZ-FD35VAS E1 Page Technical Changes See control operation Part Names and FunctionsSpecifications and rating conditions of main electric parts SpecificationIndoor model MSZ-FD25VA MSZ-FD25VAS Noise Criteria CurvesWiring Diagram Outlines and DimensionsUnit mm Unit mm Refrigerant System DiagramJ1 J2 Service FunctionsTimer Short Mode P.C. Board Modification for Individual OperationAuto Restart Function Remote ControllerOperation OPERATE/STOP Microprocessor ControlHeat Operation Auto Change Over ··· Auto Mode OperationCool Operation DRY OperationOutdoor Unit MXZ series Auto Vane OperationHorizontal vane COOL/DRY Heat Vertical vaneSee Control Operation Area SettingSee Sensor Daytime Operation and operating range Plasma OperationTimer Operation Clean OperationProgram Timer Emergency Operation switch E.O.SW Minute Time Delay OperationEMERGENCY/TEST Operation Troubleshooting OFF Failure Mode Recall FunctionPlasma operation check Flow chart of Plasma operation failure mode recall functionPlasma operation failure mode table Indoor unit failure mode tableStart Instruction of TroubleshootingAn abnormality other than above mentioned is detected Troubleshooting Check TablePlasma Trouble Criterion of Main Parts Power lamp flashes 3-time Indoor fan does not operate Troubleshooting FlowYes Check of indoor P.C. board and indoor fan motor How to check miswiring and serial signal error Check of installation of the horizontal vane Electromagnetic noise enters into TV sets or radios Indoor electronic control P.C. board Test Point Diagram and VoltageSW P.C. Board CN1 Removing the panel Photo Disassembly InstructionsPower monitor receiver Removing the electrical box Photo Removing the nozzle assembly PhotoRemoving the vertical vane motor unit Photo Removing the indoor fan motor and the line flow fan Photo Removing the horizontal vane motor PhotoSpecifications subject to change without notice