Toshiba RAS-13YAV-E, RAS-13YKV-E Operation Description, Outline of Air Conditioner Control

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8. OPERATION DESCRIPTION

8-1. Outline of Air Conditioner Control

This air conditioner is a capacity-variable type air conditioner, which uses DC motor for the indoor fan motor and the outdoor fan motor. And the capacity- proportional control compressor which can change the motor speed in the range from 13 to 120 rps is mounted. The DC motor drive circuit is mounted to the indoor unit. The compressor and the inverter to control fan motor are mounted to the outdoor unit. The entire air conditioner is mainly controlled by the indoor unit controller.

The indoor unit controller drives the indoor fan motor based upon command sent from the remote control- ler, and transfers the operation command to the outdoor unit controller.

The outdoor unit controller receives operation command from the indoor unit side, and controls the outdoor fan and the pulse modulating valve. Besides, detecting revolution position of the com- pressor motor, the outdoor unit controller controls speed of the compressor motor by controlling output voltage of the inverter and switching timing of the supply power (current transfer timing) so that motors drive according to the operation command. And then, the outdoor unit controller transfers reversely the operating status information of the outdoor unit to control the indoor unit controller.

As the compressor adopts four-pole brushless DC motor, the frequency of the supply power from inverter to compressor is two-times cycles of the actual number of revolution.

(1) Role of indoor unit controller

The indoor unit controller judges the operation commands from the remote controller and assumes the following functions.

• Judgment of suction air temperature of the indoor heat exchanger by using the indoor temp. sensor.

• Temperature setting of the indoor heat ex- changer by using heat exchanger sensor (Prevent-freezing control)

• Louver motor control

• Indoor fan motor operation control

• LED display control

• Transferring of operation command signal (Serial signal) to the outdoor unit

• Reception of information of operation status (Serial signal including outside temp. data) to the outdoor unit and judgment/display of error

(2) Role of outdoor unit controller

Receiving the operation command signal (Serial signal) from the indoor controller, the outdoor unit performs its role.

•

Compressor operation

Operations followed

 

control

•

Operation control of

to judgment of serial

 

outdoor fan motor

signal from indoor

 

side.

•

P.M.V. control

•Detection of inverter input current and current release operation

•Over-current detection and prevention opera- tion to transistor module (Compressor stop function)

•Compressor and outdoor fan stop function when serial signal is off (when the serial signal does not reach the board assembly of outdoor control by trouble of the signal system)

•Transferring of operation information (Serial signal) from outdoor unit to indoor unit

•Detection of outdoor temperature and opera- tion revolution control

•Defrost control in heating operation (Temp. measurement by outdoor heat exchanger and control for four-way valve and outdoor fan)

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Contents AIR-CONDITIONER Contents RAS-10YKV-E/RAS-10YAV-E SpecificationsSpecifications RAS-13YKV-E RAS-13YKV-E/RAS-13YAV-ECooling Operation Characteristic CurveCapacity Variation Ratio According to Temperature Cooling HeatingPiping Materials and Joints Used Safety During Installation/ServicingRefrigerant Piping Installation Refrigerant R410ANominal diameter Processing of Piping Materials1 Thicknesses of annealed copper pipes Thickness mm Outer diameter mm R410A R22Outer Thickness Dimension mm 3 Dimensions related to flare processing for R410A Outer4 Dimensions related to flare processing for R22 Outer 5 Flare and flare nut dimensions for R410AWrenches available on the market Nm kgfcmGeneral tools Conventional tools can be used R410A air conditioner Conventional air InstallationTools Required ToolsRecharging of Refrigerant 1 Configuration of refrigerant chargingFlux Brazing of PipesMaterials for Brazing Never use gas other than Nitrogen gas BrazingRAS-10YKV-E, RAS-13YKV-E Construction ViewsIndoor Unit RAS-10YAV-E RAS-13YAV-E Outdoor UnitCheck items Diagnosis result Wiring Diagram1 Simple check points for diagnosing faults V. Pulse Modulating Valve RAS-10YAV-E, RAS-13YAV-EParts name Model name Rating Specifications of Electrical PartsParts name Type Specifications RAS-10YKV-E/RAS-10YAV-E RAS-13YKV-E/RAS-13YAV-E Refrigerant Cycle DiagramRefrigerant Cycle Diagram Heating Operation DataCooling Remote Controller Control Block DiagramMCC808 P.C.B AssemblyRAS Outline of Air Conditioner Control Operation Description1 Compressor revolution range Power Factor Improvement ControlCapacity Control Current Release ControlIndoor Fan Control DC Fan Motor Prevent-Freezing Control5. P. M. V. Pulse Modulating Valve Louver ControlHeat Description of Operation CircuitOutdoor Fan Control DC Fan Motor COOL, DRYCurrent release control Outdoor temperature release controlPrevent-freezing control Louver control RpsECONO. operation control 5 Setting of air flowCold draft preventing control Heating OperationBasic control Starting and in stabilityDefrost control Temporary Cooling Operation Temporary OperationAutomatic Operation Temporary Auto OperationOperation Motion How to Set the Auto RestartAuto Restart Function Case of Power Failure during the Timer Operation How to Cancel the Auto RestartSTART/STOP button Remote ControllerParts Name of Remote Controller Name of Indications on Remote ControllerRemark per EMC Directive 89/336/EEC Installation ProcedureSafety Cautions Indoor Unit Optional Installation PartsElectrical Work Refrigerant Piping Connection Outdoor UnitFirst Confirmation HOW to Diagnose the TroubleConfirmation of Power Supply Confirmation of Power VoltageOperation of air conditioner Description Primary JudgmentOperation Which is not a Trouble Program Operation Check Block display Description for self-diagnosis Code Judgment by Flashing LED of Indoor UnitButton Self-Diagnosis by Remote Controller Check CodeOperation Control by Rated Frequency in Service Mode Self-DiagnosisBlock distinction Check outdoor heat exchanger temp Power is not turned on Does not operate entirely Judgment of Trouble by Every SymptomIndoor Unit Including Remote Controller Confirmation procedureYES Only the indoor fan does not operateCause How to examine whether remote controller is good or bad Outdoor unit does not operate Wiring Failure Interconnecting and Serial Signal WireCheck procedure Select phenomena described below Check procedure Check Code 1C Miswiring in indoor/outdoor units and 1EDiagnosis/Process flowchart Contents Summary How to Diagnose Trouble in Outdoor UnitSummarized Inner Diagnosis of Inverter Assembly Inspection procedures How to Check Simply the Main PartsHow to Check the P.C. Board Indoor Unit Operating precautionsProcedure Check point Symptom Causes Check proceduresBottom View Sensor characteristic table10-8-2. P.C. Board Layout Position Resistance value Part name Checking procedureIndoor Unit Other Parts Outdoor UnitCase that product is good Checking Method for Each PartSymptom How to Simply Judge Whether Outdoor Fan Motor is Good or BadTo assemble the front panel HOW to Replace the Main PartsPart name Procedure Remarks 11-1 Indoor UnitRemoving Louver motor Board layout MicrocomputerAttachment No. Part name Procedure RemarksDetachment Part Be careful to check the inverter becauseHigh-voltage circuit is incorporated in it BundledLead wires Propeller Flange nut is loosened by turning clockwise Perform work on a corrugated cardboard Pulse modulating valve has a roomSide and B room side. After mounting it Check that coil at B room side RedParts name Qty Remarks Part name Procedure RemarksMCC-808 Location Exploded Views and Parts ListPart Description Part Description 222 43T49023 Holder of Plate of EVA-SEAL 11, 13 12 24, 25 26, 27 12-3. P.C. Board Layout Toshiba Carrier Corporation Turn 208 10YKV-E 221 Cushion, Rubber Valve, 4-way To Sensor Ø6
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