Sanyo CH1872, CH2472 service manual DC Inverter Split System AIR Conditioner

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TECHNICAL & SERVICE MANUAL

KHS1872 + CH1872

KHS2472 + CH2472

FILE NO.

Destination: North America

DC INVERTER SPLIT SYSTEM AIR CONDITIONER

Indoor Model No. Product Code No.
KHS1872	1 852 099 85
KHS2472	1 852 099 86

Outdoor Model No. Product Code No.
CH1872	1 852 330 38
CH2472	1 852 330 39

Indoor Unit

Outdoor Unit

KHS1872	CH1872
KHS2472

IMPORTANT

These air conditioners employ new refrigerant R410A.

Pay special attention when servicing the unit.

CH2472

REFERENCE NO. SM700656-05

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Contents Indoor Model No. Product Code No DC Inverter Split System AIR ConditionerPlease Read Before Starting Table of Contents Checking Electrical Components Indoor Air Intake Temp Outdoor Air Intake Temp Operating RangeUnit Specifications SpecificationsKHS1872 CH1872208V CH2472 KHS247212.1 13.5 Indoor Unit Major Component SpecificationsCB-KHS2472 Microprocessor 250V 3A Outdoor Unit CH1872 Outdoor UnitCompressor External FinishOutdoor Unit CH2472 Indoor heat exchanger sensor Other Component SpecificationsCompressor temp sensor Outdoor air temp sensorIndoor Unit KHS1872 Dimensional Data11-17/32 23-15/16 35-7/16900 Refrigerant Flow Diagram Refrigerant Flow DiagramInsulation of Refrigerant Tubing After a tube has been insulated To break or crackLow pressure performance chart Temperature ChartsOperating current performance chart Indoor discharge air performance chartHigh pressure performance chart Wide 73F Cooling Capacity Power Supply 230V Single Phase 60Hz Cooling Capacity24,200 BTU/h Indoor Outdoor Cooling Capacity Low Ambient24,200 BTU/h Heating Capacity Power Supply 230V Single Phase 60Hz Heating CapacityTH Total Heating Capacity BTU/h 29,000 BTU/h Cooling Vertical distance ft Air Throw Distance ChartsRoom air temp F 26.7C Fan speed High Horizontal distance ft Heating Vertical distance ftHeating Electrical Data Electrical CharacteristicsCH1872 Voltage230V Cooling Voltage208V CoolingCH2472 Voltage230V Cooling Indoor Unit KHS1872 KHS2472 Electric Wiring Diagrams8FA2-5257-70500-0 WHT WHT YEL YEL Address Setting of the Remote Control Unit MaintenanceButton Operation HR.TIMER button ACL Reset button How to Connect How to DisconnectOperation Functions FunctionsEmergency operation Auto cooling/heating operationLamp colors Timer backupProtective Functions Compressor discharge temperature controlOverload prevention during heating Freeze preventionCT Peak current cut-off control Defrost detection and releaseReverse-Cycle Defrosting Precautions before Performing Inspection or Repair TroubleshootingMethod of Self-Diagnostics Self-diagnostics Lamps Replace the controller NormalReplace the circuit board or the fuse Checking the Indoor and Outdoor Units Using the TEST/T-RUN terminalsChecking the indoor unit Control Check items unit operation Off Blinking Illuminated Serial Communication Error Identification ProcedureBefore the Operation Condition E01Terminal board Outdoor Unit Condition E12 Indoor Fan Motor Trouble Diagnosis of Fan MotorOutdoor Fan Motor Noise malfunction Noise Malfunction and Electromagnetic InterferenceElectromagnetic interference Locations most susceptible to noise Trouble CorrectionChecking Electrical Components Power Supply CordMeasurement of Insulation Resistance Measurement of Insulation Resistance for Electrical PartsChecking Continuity of Fuse on PCB Assy Characteristics of New Refrigerant R410A Refrigerant R410A Special Precautions When Servicing UnitWhat is New Refrigerant R410A? CharacteristicsChecklist before Servicing Tools Specifically for R410A Tubing Installation ProceduresCase of Compressor Malfunction Procedure for Replacing CompressorUnit. This may cause Never charge a large amountDamage to the compressor ExampleWelding leaking points Case Refrigerant is LeakingRecharging Charging Additional Refrigerant When Tubes are ExtendedRetro-Fitting Existing Systems Use of Existing UnitsOI-852-6-4180-801-00-2 Features Alert Symbols ContentsProduct Information Safety Instructions Installation LocationElectrical Requirements Names of Parts Quiet lamp Unit Display and Operation ButtonRemote Control Unit Display HR. Timer button Remote Control UnitAdvance button TransmitterFAN Speed selector button Quiet buttonTemperature Display Selector Using the Remote Control UnitHow to Install Batteries Button Time Display Selector buttonUsing the Remote Control Unit Press the ON/OFF operation button Operation with the Remote Control UnitPress the Mode selector button and select the desired mode Operation with the Remote Control UnitPress the TEMP. setting buttons to change the temperature Set the FAN Speed selector button to the setting you wantAdjusting the Fan Speed Night Setback Mode is used for saving energy Cooling and DRY ModeQuiet Mode Special Remarks Example To set to 1030 pm Setting the TimerOperation Indication How to set the on time Example To start operation at 710 am Setting the TimerTo cancel a timer program Press the Cancel button 1030 pm 710 am 1100 am Present timeSetting procedure Using the 1-Hour OFF TimerCancellation procedure Operation together with the Daily ON/OFF Repeat TimerSetting the airflow manually Adjusting the Airflow DirectionHorizontal Sweep functionCare and Cleaning Operation without the Remote Control UnitWhen the air conditioner is not running Cleaning Care and CleaningGrasp both ends of the air Intake grilleNegative ion generator metal electrodes inside plastic case Follow the steps below when the generator has become dirtyOperating Range TroubleshootingTrouble Possible Cause Remedy Max DB / 71 F WB Min DB / 57 F WBAppendix B Installation Instructions Contents Installation InstructionsPlease Read Before Starting Accessories Supplied with Unit Table Tools Required for Installation not suppliedGeneral Optional Copper Tubing KitAdditional Materials Required for Installation Installation Site SelectionSolid base must not cover the hole of the bottom plate Trical wiring or conduits are How to Install the Indoor UnitRemove the Rear Panel from the Unit Make a HoleIf Wooden Wall Install the Rear Panel on the WallIf Block, Brick, Concrete or Similar Type Wall How to remove the grille Remove the Grille to Install the Indoor UnitHow to replace the grille Shape the Indoor Side Tubing Wiring Instructions General precautions on wiringAWG Recommended Wire Length and DiameterWiring Instructions for Inter-unit Connections For Outdoor Unit For solid core wiring or F-cable How to connect wiring to the terminal For Indoor UnitFor stranded wiring Right-side tubing MountingLeft-side tubing Switching drain hose and drain capDrain cap Tubing and wiring to the out Do not supply power toTo unmount indoor unit Unit or operate it until allFirst refer to . Installation Site Selection How to Install the Outdoor UnitWiring Instructions for the Outdoor Unit To 0.5 mm Adjust so that the amount of tube Flaring Procedure with a Flare ToolRefrigerant Tubing Use of the Flaring MethodFinishing the Installation Connecting Tubing between Indoor and Outdoor UnitsInsulation of Refrigerant Tubing To prevent heat loss and wet floors due to dripping of conAir Purging Hex wrench before Be sure to completely insertAttempting to turn the valve How to Test Run the Air Conditioner When opening or clos Ing the service valve Basic Functions of the Service ValvesStem, use the accessory Pump DownMounting on a Wall Remote Control Unit Installation PositionAddress Setting of the Remote Control Unit Address Switch

DC INVERTER SPLIT SYSTEM AIR CONDITIONER

Indoor Model No. Product Code No.

KHS1872

CH1872

KHS2472