Toshiba RAS-10SK-E Troubleshooting Flowcharts, Power can not be Turned on No Operation at All

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9-3. Troubleshooting Flowcharts

9-3-1. Power can not be Turned on (No Operation at All)

<Preliminary checks>

(1)Is the supply voltage normal?

(2)Is the connection to the AC output OK.?

Shut off the power supply from AC outlet once and turn it on after 5 seconds.

NO Does the OPERATION lamp flash?

YES

Operation

Check Items

Main cause

Countermeasure

Symptom

Does the power turn

NO

Does the transmission

NO

on by pushing the

indicator of remote

 

 

[START/STOP] button

 

control flash normally and

 

of the remote control?

 

transmit certainly?

 

 

 

 

YES

YES

 

 

 

(No problem)

 

 

Does the fuse

YES

Parts (R21, R109, SG01,

 

 

 

C15, C01, DB01, C02,

 

 

(F01) blow?

 

 

 

 

IC01, T01) are defective.

 

 

 

 

 

 

NO

 

 

 

 

Does the thermal

YES

Wrong wiring of

 

 

fuse blow?

 

AC cord or connecting

 

 

(Under PF. Terminal)

 

cable is defective.

 

 

NO

 

 

 

NO

Is the indication voltage

 

 

 

 

(DC12V or 5V) of main

 

 

 

 

PC board correct?

 

 

 

 

YES

 

 

 

 

 

 

 

PC board

 

 

 

 

is defective.

Is the voltage

NO

 

Refer to the paragraph

 

 

 

 

across C02 measured

 

 

"Pre-check", or defective circuit

 

 

 

 

 

 

 

DC310V~340V?

 

 

before power PC board block.

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Shut off the power

 

 

 

 

Is the secondary

 

 

Is the secondary

 

 

SW transformer

voltage of SW trans-

NO

 

supply once, and turn

voltage of SW

NO

 

 

 

(T01) or IC (IC01)

former (T01) measured

 

 

it on again after dis-

 

transformer measured

 

 

for power supply

 

 

 

 

 

DC35V, DC12V,

 

 

connecting the motor

DC35V, DC12V,

 

 

 

 

 

 

is defective.

and DC7V ?

 

 

connector CN10*.

and DC7V?

 

 

 

 

 

 

 

 

YES

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Remote control is defective.

Replace the remote control.

Replace the thermal fuse set. Check connection.

Replace the main PC board.

Replace the main PC board.

Motor is defective.

*Be sure to disconnect the motor connector CN10 after shut off the power supply, or it will be a cause of damage of the motor.

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Contents R C O Contents Primary Judgement of Trouble Sources Troubleshooting FlowchartsWhat to be Prechecked First Specifications RAS-10SK-E/10SA-E RAS-10SKX/10SAX CoolingCondition JIS C9612-1994 Temperature Cooling Construction Views Indoor UnitOutdoor Unit RAS-10SA-E RAS-10SAXWiring Diagram Main P.C. BoardSpecifications of Electrical Parts Parts name Type SpecificationsRefrigerant Cycle Diagram RAS-10SK-E / RAS-10SA-E RAS-10SKX / RAS-10SAXMICRO-COMPUTER Block Diagram AUTO, COOL, DRY, FAN onlyCool Operation Operation DescriptionsFAN only Operation M3/hDRY Operation Louver ControlAuto Operation Temporary AutoCooling ECONO. ModeLow-Temperature Limit Control Cooling Operation How to Set the Auto Restart Auto Restart FunctionHow to Cancel the Auto Restart Case of Power Failure during the Timer OperationInstallation Procedure Safety Cautions For general public useUK Plugs and Sockets etc Safety Regulations SI Number Installation Diagram of Indoor and Outdoor Units AttachOptional Parts InstallationInstallation Parts Remote control Installation placeCutting a Hole and Mounting Installation Plate Mounting the installation plateWhen the installation plate is directly mounted on the wall Electrical WorkHow to open the screw cap Wiring ConnectionHow to remove the front cabinet Taking out the power cordStripping length of connecting cable How to install the front cabinet on the indoor unitCase of downward piping Piping and Drain Hose InstallationCase of rightward piping Left-hand connection with pipingIndoor Unit Installation DrainageStrong wind Flaring Refrigerant Piping ConnectionVacuum Pumping Tightening connectionPacked Valve Handling Precautions A5 mm hexagon wrench is requiredOthers Auto Restart SettingHow to set the Auto Restart Gas Leak TestWhat to be Prechecked First Troubleshooting ChartPower Supply Voltage Incorrect Cable Connection between Indoor and Outdoor UnitsMisleading but Good Operations Program Controlled Operation Operation of air-conditioner DescriptionBlock display Primary Judgement of Trouble SourcesRole of Indoor Unit Controller Self-diagnosis with remote control Selecting ordinary modeSelf-diagnosis by check codes Operating key Indication after operationCondition Code Status Preliminary checks Troubleshooting FlowchartsPower can not be Turned on No Operation at All Outdoor Unit does not Operate Power can not be Turned on after Replacing Indoor PC BoardChecking Procedure Only Compressor does not Operate Only Outdoor Fan does not Operate Check procedure Only the Indoor Fan does not OperateThere is no beep from Inspection procedures How to Check the PC BoardOperating precautions Main PC board partProcedure Check Point Symptom Causes PC Board Layout Top View Bottom ViewHow to Reduce the Operation Time of the Anti-Restart Timer SensorPart Replacement Indoor Unit RAS-10SK-E, RAS-10SKXPart name Procedure Remarks Microcomputer RAS-10SK-E, RAS-10SKX Outdoor Unit RAS-10SA-E, RAS-10SAX OFF Exploded Views and Parts List Part DescriptionIndoor Unit Capillary Tube