Sanyo CH3632, XHS3632, XHS2432, CH2432 service manual 0343MI

Page 67

4. Service procedures

11)Symptoms: LCD on the remote controller displays “CHECK P03”. (Alarm for unusual discharge temp. of compressor)

Start

Unusual discharge gas temperature

•Refrigerant shortage

•Clogged refrigerant circuit

•Electronic refrigerant control valve defect (indoor unit)

0343_M_I

Section

1

12)Symptom: LCD on the remote controller displays “CHECK P04”.

(High-pressure switch activation warning)

Start

2

The system does not operate again.

Yes

High-pressure switch activation

(Both cooling and heating)

•Electronic refrigerant control valve defect

•Refrigerant over-charged (Cooling)

•Outdoor unit, heat exchanger dirty, clogged

•Outdoor unit air short

•Outdoor fan stopped

(Heating)

•Outdoor unit air short

•Indoor unit, heat exchanger dirty, clogged

•Large pipe side service valve closed

•Indoor fan stop

•Air filter clogged

No

Are there connection defects in the wiring?

No

High-pressure switch defect

Yes

Repair the wiring.

3

4

0344_M_I

SM830076

– 67 –

Image 67

Contents Split System AIR Conditioner If Necessary, Get Help Please Read Before StartingWHO should USE this Manual Table of Contents Service Procedures Introduction Read Me First Specifications Performance Specifications Unit SpecificationsData Subject to Change Without Notice Model No Indoor Unit XHS3632 Outdoor Unit PNR-XHS3632 Fan motor Specifications Major Component Specifications Indoor UnitModel No XHS3632 Source Compressor Specifications Major Component Specifications Outdoor UnitModel No CH3632 Source Model No XHS2432 Power Transformer Specifications Other Component Specifications Indoor UnitXHS3632 Power Transformer Model No CH2432 Specifications Other Component Specifications Outdoor UnitModel No CH3632 Specifications Dimensional Data Indoor Unit XHS2432 Specifications Dimensional Data Indoor Unit XHS3632 Specifications Dimensional Data Outdoor Unit CH2432Specifications Dimensional Data Outdoor Unit CH3632 Operating Range Specifications Refrigerant Flow Diagram Outdoor Unit CH2432Indoor Unit XHS2432 Indoor Unit XHS3632 Specifications Refrigerant Flow Diagram Outdoor Unit CH3632Processes and Functions Processes and1.SpecificationsfunctionsProcesses and functions Room Temperature ControlCooling Heating Cold Draft Prevention Heating Cycle Automatic Fan Speed Indoor Unit Chart Explanations and notesOutdoor Fan Speed Control Freeze Prevention Cooling Condensing Temperature Control Cooling This function prevents the air conditioner from overloading Overload Protection HeatingDischarge Temperature Control Cooling and Heating Auto. Mode for Automatic Heating/Cooling Switching Processes and functions Defrosting Control, Outdoor Heat Exchanger Coil Heating Time Chart for Defrosting11 4-Way Valve, Solenoid Control Normal Control ModeAuto Control Mode Automatic Restart after Power InterruptionFuzzy Control Compressor Discharge Gas TemperatureElectronic Expansion Valve Heating Except During DefrostingOverload Protection Compressor Current Detection CircuitFuzzy control optimal refrigerant flow rate control Contents and Order of controlElectronic Expansion Valve Control Refrigerant flow distribution controlVoltage Detection Control Processes and functions Electrical data Electrical DataXHS2432, XHS3632 Indoor UnitSchematic Diagram OutdoorUnit CH2432Controller Outdoor UnitCH3632 Electric Wiring DiagramFMO1 FMO2 Electrical data Service procedures Service ProceduresThis section explains TroubleshootingCheck inter-unit wiring Service procedures Check before and after TroubleshootingCheck power supply Check power supply wiringCooling Service procedures Heating Controller Display Meanings of alarm messagesWireless remote Controller Display Refrigerant Shortage Service procedures Symptoms and parts to inspect SM830076 0335MI Influenced by external noise Yes Start Is there connector contact defect? Correct the connection 0343MI Symptom LCD on the remote controller displays Check E15 Symptom LCD on the remote controller displays Check E16 0346MI Indoor fan does not operate Compressor motor does not operate Set service check switches Service procedures Use the test run procedure Service procedures Check the sensor temperature readings Find out about past service problems SET Temp Check the remote controller itself for correct operation Service procedures Execute the auto. address operation 0362MI 0364MI Change the shift temperature in heating mode Service procedures Set the indoor unit address Set the No. of R. C. which you want to set with , button 0371MI Service procedures Change the period of the filter timer Measurement of Insulation Resistance Checking the Electrical ComponentsCompressor motor thermal protector . . . . . . Outdoor unit Checking the Protective DevicesPower transformer TR1 Service procedures Checking the Electrical PartsContinuity of fuse on P.C.B. Ass’y Motor capacitor ............ Both in indoor and outdoor unitCompressor motor magnetic contactor 52C ………… Outdoor unit Case of single -phase compressorSolenoid coil of the electronic refrigerant Compressor motor CM ……… Outdoor unitCH2432 Service procedures Sensor and Solenoid Layout DiagramXHS3632 Service procedures Thermistor Characteristic Curve Standard control single outdoor unit Service procedures C.B. SettingCentral control when using the *system controller Setting of indoor control P.C.BBoth OFF Set to When shipped from factory Displaying Indoor / Outdoor Unit Combination Numbers Service procedures Automatic Address Setting MethodItems to Check Prior to Test Run Service procedures Test Run 100 Test Run Procedure CR-THS2432 Service procedures 12 P.C.B. and Parts LocationCR-CH2432 Checking procedure for each P.C.B Switch the pin from normal operation to check operation Service procedures Check PinsCentral Region

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