Toshiba RAS-13UKV-E2, RAS-13UAV-E2 service manual HOW to Diagnose the Trouble, First Confirmation

Page 53

FILE NO. SVM-03008

10. HOW TO DIAGNOSE THE TROUBLE

The pulse modulating circuits are mounted to both indoor and outdoor units. Therefore, diagnose troubles according to the diagnosis procedure as described below. (Refer to the check points in servicing written on the wiring diagrams attached to the indoor/outdoor units.)

Table 10-1

No.

Troubleshooting Procedure

Page

 

 

 

1

First Confirmation

52

 

 

 

2

Primary Judgment

53

 

 

 

3

Judgment by Flashing LED

54

 

of Indoor Unit

 

 

 

 

4

Self-Diagnosis by Remote Control

55

 

 

 

5

Judgment of Trouble by

58

 

Every Symptom

 

 

 

 

6

How to Check Simply the Main Parts

66

 

 

 

NOTE:

A large-capacity electrolytic capacitor is used in the outdoor unit control (inverter). Therefore, if the power supply is turned off, charge (charging voltage DC280V) remains and discharging takes a lot of time. After turning off the power source, if touching the charging section before discharging, an electrical shock may be caused. Discharge the electrolytic capacitor completely by using soldering iron, etc.

<Discharging method>

(1)Remove the inverter cover (plating) by opening four mounting claws.

(2)As shown below, connect the discharge resistance (approx. 100Ω 40W) or plug of the soldering iron to voltage between + – terminals of the C14

(“CAUTION HIGH VOLTAGE 380 V” is indicated.) electrolytic capacitor (500∝ F/400 V) on P.C. board, and then perform discharging.

 

 

Inverter cover

Discharging position

Plug of

P. C. board

soldering

(Soldered surface)

(Discharging period

iron

 

10 seconds or more)

 

 

 

10-1. First Confirmation

10-1-1. Confirmation of power supply

Confirm that the power breaker operates (ON) normally.

Fig. 10-1

10-1-2. Confirmation of power voltage

Confirm that power voltage is AC 220-240 V ± 10%. If power voltage is not in this range, the unit may not operate normally.

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Contents AIR Conditioner Contents HOW to Replace the Main Parts Specifications SpecificationsCapacity Variation Ratio According to Temperature Operation Characteristic CurveRefrigerant Piping Installation Safety During Installation/ServicingRefrigerant R410A Piping materials and joints usedThickness mm 1 Thicknesses of annealed copper pipesOuter diameter mm R410A R22 Processing of piping materialsClutch type Wing nut type Flare tool for R410A Conventional flare toolWidth Diameter·m kgf·m ·m kgf·cmGeneral tools Conventional tools can be used ToolsRequired tools Recharging of Refrigerant 1 Configuration of refrigerant chargingBrazing of Pipes Types of flux Noncorrosive flux Characteristics required for fluxActivated flux Brazing215 Indoor UnitCover PV Outdoor UnitCheck Item Diagnosis Result Wiring Diagram1 Simple Check for Failure Diagnosis BRW Specifications Specification of Electrical PartsParts name RatingRefrigerant Cycle Diagram Refrigerant Cycle DiagramOperation Data Rays Control Block DiagramMCC813P.C.B Outdoor Unit Inverter AssemblyOutlined of Air Conditioner Control Operation DescriptionCapacity control Power factor improvement control1 Compressor revolution range Operation Model Revolution rps5. P.M.V. Pulse Modulating Valve Prevent-freezing controlLouver control Indoor fan control DC fan motorCompressor revolution rps From Outdoor fan control DC fan motorModel name Cooling capacity control Description of Operation CircuitBy indoor fan speed Limit for maximum compressor motor speedHeating operation Basic controlHeating capacity control Starting and in stability StabilityHigh-temp. release control Defrost controlTime Automatic operationTemporary button Control Temporary OperationTemporary auto operation Temporary cooling operationWhen the unit is on standby Not operating Operation How to set auto restart functionWhen the unit is in operation Operation Auto Restart FunctionFilter Check Lamp Remote Control and its Functions Temperature display Mode displayTimer and clock time display Hi-POWER displayFile NO. SVM-03008 To Disconnect the Appliance from the Main Power Supply Installation ProcedureSafety Cautions File NO. SVM-03008 Attach Installation Diagram of Indoor and Outdoor UnitsFixing bolt arrangement of outdoor unit Optional installation parts Part Parts name ’ty CodeOthers Accessory and installation partsName OptionNew tools for R410A Applicable to R22 model Changes Remote controller Installation placeMounting the installation plate Cutting a holeElectrical work When the installation plate is directly mounted on the wallChanging drain hose How to remove the Drains CapDie-cutting Front panel slit Case of right or left piping How to fix the Drains CapLeft-hand connection with piping Case of bottom right or bottom left pipingDrainage Run the drain hose sloped downwards Indoor unit fixingProjection margin in flaring a Unit mm Refrigerant piping connection FlaringR410A Conventional Copper pipe Tool used Copper pipe Tightening connectionOuter dia Tightening torque Copper pipe Using a vacuum pumpShaping pipes EvacuatingStripping length of connection cable Packed valve handling precautionsWiring connection How to set the auto restart Auto restart settingGas leak test Test operationFirst Confirmation HOW to Diagnose the TroubleOperation of air conditioner Description Primary JudgmentOperation which is not a trouble Program operation Judgment by Flashing LED of Indoor Unit IndoorindicationHow to use remote control in service mode Self-Diagnosis by Remote Control Check CodeCause of operation Short circuit. Replace Check Item Judgment of Trouble by Every SymptomTurn on power supply YES Only indoor fan motor does not operate Primary checkInspection procedure Troubleshooting for remote control Pipe clogging Check procedure Check Code 1C Miswiring in indoor/outdoor units and 1EAGE on P.C. board How to Diagnose Trouble in Outdoor UnitDiagnosis/Process flowchart Contents Summary How to Check Simply the Main PartsInspection procedures Main P.C. board partOPERATION, TIMER, PRE. DEF Check procedures Procedure Check points Symptom CausesBottom View Sensor characteristic table10-8-2. P.C. board layout Outdoor unit Part name Checking procedure Indoor unit Other parts Part name Checking procedureDiode check Igbt check Checking Method for Each Part Part name Checking procedureCause SymptomPart name Procedures Remarks HOW to Replace the Main PartsFigure below For position of the fan motor connector Microcomputer Detachment Requirement Connector is one Assembly to other parts Fan motor Perform work of item 1 of 1 Set take-out part of the lead wire of coil to Part name Board layout MCC-813 Indoor Unit E-Parts Assy Exploded Views and Parts ListFront Panel Assy Cabinet, Front, Assy Outdoor Unit E-Parts Assy Toshiba Carrier Corporation

RAS-13UAV-E2, RAS-13UKV-E2 specifications

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