Toshiba RAS-13UKV-E2, RAS-13UAV-E2 service manual Cause of operation

Page 57

FILE NO. SVM-03008

10-4-2. Caution at servicing

(1)After servicing, push the START/STOP button to return to the normal mode.

(2)After servicing by the check code, turn off breaker of the power supply, and turn on breaker of the power supply again so that memory in the microcomputer returns the initial status. However, the check codes are not deleted even if the power supply is turned off because they are stored in the fixed memory.

 

 

 

 

Table 10-4-1

 

 

 

 

 

 

 

 

 

 

 

Block distinction

 

Operation of diagnosis function

 

 

 

 

 

 

 

 

 

 

 

Judgment and action

Check

Block

Check

Cause of operation

 

Air conditioner

Remarks

 

 

 

 

code

code

 

status

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Indoor

 

Short-circuit or disconnec-

 

Operation

Displayed when

1. Check the room temp. sensor.

 

P.C.

 

tion of the room

 

continues.

error is detected.

2. When the room temp. sensor is

 

board

 

temperature sensor

 

 

 

 

normal, check P.C. board.

 

etc.

 

(TA sensor).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Being out of place,

 

Operation

Displayed when

1. Check heat exchanger sensor.

 

 

 

disconnection, short-circuit,

 

continues.

error is detected.

2.

When heat exchanger sensor is

 

 

 

or migration of heat

 

 

 

 

normal, check P.C. board.

 

 

 

exchanger sensor

 

 

 

 

 

 

 

 

(TC sensor)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Lock of indoor fan or trouble

 

All off

Displayed when

1. Check P.C. board.

 

 

 

on the indoor fan circuit

 

 

error is detected.

2.

When P.C. board is normal, check

 

 

 

 

 

 

 

 

the motor.

 

 

 

 

 

 

 

 

 

Not

 

Trouble on other indoor

 

Operation

Displayed when

Replace P.C. board.

 

displayed

 

P.C. boards

 

continues.

error is detected.

 

 

 

 

 

 

 

 

 

 

 

 

Connec-

 

Return serial signal is not

 

Operation

Flashes when

1.

When the outdoor unit never

 

ting cable

 

sent to indoor side from

 

continues.

trouble is

 

operate:

 

and serial

 

operation started.

 

 

detected on

 

(1) Check connecting cable, and

 

signal

 

(1) Defective wiring of

 

 

return serial

 

correct if defective wiring.

 

 

 

connecting cable

 

 

signal, and

 

(2) Check 25A fuse of inverter

 

 

 

(2) Operation of

 

 

normal status

 

P.C. board

 

 

 

compressor thermo.

 

 

when signal is

 

(3) Check 3.15A of inverter

 

 

 

Gas shortage

 

 

reset.

 

P.C. board.

 

 

 

Gas leak

 

 

 

2.

To display [Other] block during

 

 

 

 

 

 

 

 

operation, check compressor

 

 

 

 

 

 

 

 

thermo. operation and supply gas

 

 

 

 

 

 

 

 

(check gas leak also).

 

 

 

 

 

 

 

3.

Unit operates normally during

 

 

 

 

 

 

 

 

check.

 

 

 

 

 

 

 

 

If Return serial signal does not

 

 

 

 

 

 

 

 

stop between 2 and 3 of the

 

 

 

 

 

 

 

 

indoor terminal block, replace

 

 

 

 

 

 

 

 

inverter P.C. board.

 

 

 

 

 

 

 

 

If signal stops between indoor

 

 

 

 

 

 

 

 

terminal block 2 and 3, replace

 

 

 

 

 

 

 

 

indoor P.C. board.

 

 

 

 

 

 

 

 

 

 

 

Operation command signal

 

Operation

Flashes when

If return serial signal does not stop

 

 

 

is not sent to outdoor side.

 

continues.

trouble is

between indoor terminal block 2

 

 

 

 

 

 

detected on

and 3, replace inverter P.C. board.

 

 

 

 

 

 

operation

If signal stops between indoor

 

 

 

 

 

 

command signal,

terminal block 2 and 3, replace

 

 

 

 

 

 

and normal status

indoor P.C. board.

 

 

 

 

 

 

when signal is

 

 

 

 

 

 

 

 

reset.

 

 

 

 

 

 

 

 

 

 

 

– 56 –

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Page 56 Page 58
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·cmTools Required toolsGeneral tools Conventional tools can be used 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 UnitWiring Diagram 1 Simple Check for Failure DiagnosisCheck Item Diagnosis Result 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 motorOutdoor fan control DC fan motor Model nameCompressor revolution rps From 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 Installation Procedure Safety CautionsTo Disconnect the Appliance from the Main Power Supply 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 wallHow to remove the Drains Cap Die-cutting Front panel slitChanging drain hose 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 EvacuatingPacked valve handling precautions Wiring connectionStripping length of connection cable How to set the auto restart Auto restart settingGas leak test Test operationFirst Confirmation HOW to Diagnose the TroublePrimary Judgment Operation which is not a trouble Program operationOperation of air conditioner Description 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 CausesSensor characteristic table 10-8-2. P.C. board layoutBottom View 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

The Toshiba RAS-13UKV-E2 and RAS-13UAV-E2 air conditioning units represent a significant step forward in both comfort and energy efficiency. Designed for residential and light commercial use, these models are packed with features that cater to diverse climate control needs while adhering to modern standards of sustainability.

One of the standout features of both models is the implementation of inverter technology. This advanced system allows for more precise temperature control by adjusting the compressor speed based on the ambient temperature requirements. This not only enhances energy efficiency but also ensures a quieter operation compared to traditional air conditioning systems. As a result, users benefit from consistent comfort without the disruptive sounds often associated with cooling units.

The RAS-13UKV-E2 and RAS-13UAV-E2 also feature a high energy efficiency rating, which is crucial for reducing electricity bills. The Seasonal Energy Efficiency Ratio (SEER) is a vital measure of energy efficiency over an entire cooling season. Both units excel in this regard, making them an environmentally friendly choice. This is further supported by Toshiba's commitment to incorporating R32 refrigerant, known for its lower environmental impact compared to older refrigerants.

User convenience is enhanced with integrated smart controls. Both models are compatible with wireless remote control features, allowing for easy adjustments from a distance. This is complemented by programmable settings that let users schedule operation times, ensuring that the units run only when needed, which further optimizes energy consumption.

Design-wise, these air conditioners boast a sleek and modern appearance, making them a visually appealing addition to any room. They are constructed with durable materials that ensure longevity and reliability. Moreover, the filters are designed for easy maintenance, ensuring cleaner indoor air quality and prolonging the lifespan of the unit.

The Toshiba RAS-13UKV-E2 and RAS-13UAV-E2 units also come equipped with advanced air purification technologies. These features help to reduce airborne pollutants and allergens, contributing to a healthier indoor environment. With exceptional cooling and heating capabilities, easy installation, and advanced features, these models are designed to meet the modern user's needs for comfort, efficiency, and health. Overall, they represent an excellent investment in both cooling technology and eco-friendly practices.
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