Sanyo CH2472, CH1872 service manual Features

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Features

This air conditioner is an inverter type unit that automatically adjusts capacity as appropriate. Details on these functions are provided below; refer to these descriptions when using the air conditioner.

Microprocessor Controlled Operation

The interior compartment of the remote control unit contains several features to facilitate automatic operation, easy logically displayed for easy use.

Simple One-touch Wireless Remote Control The remote control unit has several features to facilitate automatic operation.

24-Hour ON or OFF Timer

This timer can be set to automatically turn the unit on or off at any time within a 24 hour period.

1-Hour OFF Timer

This timer can be set to automatically turn off the unit at any time after one hour.

Night Setback

Pressing this button changes the setting of the room temperature thermostat, allowing you to set the temperature at whatever level that you find comfortable.

Automatic and 3-step Fan Speed Auto/High/Medium/Low

Air Sweep Control

This function moves a flap up and down in the air outlet, directing air in a sweeping motion around the room and providing comfort in every corner.

Auto. Flap Control

This automatically sets the flap to the optimum position during heating, cooling, and drying operation.

Automatic Switching between Cooling and Heating

This unit automatically switches between cooling operation and heating operation according to the difference between the room temperature and the temperature setting.

Hot Start Heating System

Right from the start, the air is warm and comfortable. This system prevents any cold blasts at the beginning while the heat pump is warming up, or even defrosting.

Automatic Restart Function for Power Failure Even when power failure occurs, preset programmed operation can be reactivated once power resumes.

High Power Operation

If not in Auto Operation, the unit operates at maximum output for 30 minutes, regardless of the desired temperature.

The fan speed is 1 step above “High”.

Quiet Operation

The fan rotates slower than the fan speed setting to provide a quieter operating sound.

ION Operation

While it is operating, the unit generates negative ions that freshen up the air in the room.

Anti-Mold Filter

This unit is equipped with an anti-mold filter that inhibits the growth of mold and bacteria.

Air Clean Filter

An air filter that eliminates unpleasant odors and cleans the air is available.

Purchase a replacement filter at your local dealer. (model STK-FDXB)

2

OI-801-2-EG

 

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Contents DC Inverter Split System AIR Conditioner Indoor Model No. Product Code NoPlease Read Before Starting Table of Contents Checking Electrical Components Operating Range Indoor Air Intake Temp Outdoor Air Intake TempKHS1872 SpecificationsUnit Specifications CH1872208V KHS2472 CH247212.1 13.5 Major Component Specifications Indoor UnitCB-KHS2472 Microprocessor 250V 3A Compressor Outdoor UnitOutdoor Unit CH1872 External FinishOutdoor Unit CH2472 Compressor temp sensor Other Component SpecificationsIndoor heat exchanger sensor Outdoor air temp sensorDimensional Data Indoor Unit KHS187211-17/32 23-15/16 35-7/16900 Insulation of Refrigerant Tubing Refrigerant Flow DiagramRefrigerant Flow Diagram After a tube has been insulated To break or crackOperating current performance chart Temperature ChartsLow pressure performance chart Indoor discharge air performance chartHigh pressure performance chart Wide 73F Power Supply 230V Single Phase 60Hz Cooling Capacity Cooling Capacity24,200 BTU/h Cooling Capacity Low Ambient Indoor Outdoor24,200 BTU/h TH Total Heating Capacity BTU/h Power Supply 230V Single Phase 60Hz Heating CapacityHeating Capacity 29,000 BTU/h Room air temp F 26.7C Fan speed High Horizontal distance ft Air Throw Distance ChartsCooling Vertical distance ft Heating Vertical distance ftHeating CH1872 Voltage230V Cooling Electrical CharacteristicsElectrical Data Voltage208V CoolingCH2472 Voltage230V Cooling 8FA2-5257-70500-0 Electric Wiring DiagramsIndoor Unit KHS1872 KHS2472 WHT WHT YEL YEL Button Operation HR.TIMER button ACL Reset button MaintenanceAddress Setting of the Remote Control Unit How to Disconnect How to ConnectEmergency operation FunctionsOperation Functions Auto cooling/heating operationTimer backup Lamp colorsOverload prevention during heating Compressor discharge temperature controlProtective Functions Freeze preventionReverse-Cycle Defrosting Defrost detection and releaseCT Peak current cut-off control Method of Self-Diagnostics TroubleshootingPrecautions before Performing Inspection or Repair Self-diagnostics Lamps Replace the circuit board or the fuse NormalReplace the controller Checking the indoor unit Control Check items unit operation Using the TEST/T-RUN terminalsChecking the Indoor and Outdoor Units Before the Operation Serial Communication Error Identification ProcedureOff Blinking Illuminated Condition E01Terminal board Outdoor Unit Condition E12 Trouble Diagnosis of Fan Motor Indoor Fan MotorOutdoor Fan Motor Electromagnetic interference Noise Malfunction and Electromagnetic InterferenceNoise malfunction Locations most susceptible to noise Trouble CorrectionMeasurement of Insulation Resistance Power Supply CordChecking Electrical Components Measurement of Insulation Resistance for Electrical PartsChecking Continuity of Fuse on PCB Assy What is New Refrigerant R410A? Refrigerant R410A Special Precautions When Servicing UnitCharacteristics of New Refrigerant R410A CharacteristicsChecklist before Servicing Tubing Installation Procedures Tools Specifically for R410AProcedure for Replacing Compressor Case of Compressor MalfunctionDamage to the compressor Never charge a large amountUnit. This may cause ExampleRecharging Case Refrigerant is LeakingWelding leaking points Retro-Fitting Existing Systems When Tubes are ExtendedCharging Additional Refrigerant Use of Existing UnitsOI-852-6-4180-801-00-2 Features Product Information ContentsAlert Symbols Electrical Requirements Installation LocationSafety Instructions Names of Parts Unit Display and Operation Button Quiet lampRemote Control Unit Display Advance button Remote Control UnitHR. Timer button TransmitterQuiet button FAN Speed selector buttonHow to Install Batteries Using the Remote Control UnitTemperature Display Selector Button Time Display Selector buttonUsing the Remote Control Unit Operation with the Remote Control Unit Press the ON/OFF operation buttonPress the TEMP. setting buttons to change the temperature Operation with the Remote Control UnitPress the Mode selector button and select the desired mode Set the FAN Speed selector button to the setting you wantAdjusting the Fan Speed Cooling and DRY Mode Night Setback Mode is used for saving energyQuiet Mode Special Remarks Operation Indication Setting the TimerExample To set to 1030 pm To cancel a timer program Press the Cancel button Setting the TimerHow to set the on time Example To start operation at 710 am 1030 pm 710 am 1100 am Present timeCancellation procedure Using the 1-Hour OFF TimerSetting procedure Operation together with the Daily ON/OFF Repeat TimerHorizontal Adjusting the Airflow DirectionSetting the airflow manually Sweep functionWhen the air conditioner is not running Operation without the Remote Control UnitCare and Cleaning Grasp both ends of the air Care and CleaningCleaning Intake grilleFollow the steps below when the generator has become dirty Negative ion generator metal electrodes inside plastic caseTrouble Possible Cause Remedy TroubleshootingOperating Range Max DB / 71 F WB Min DB / 57 F WBAppendix B Installation Instructions Installation Instructions ContentsPlease Read Before Starting General Tools Required for Installation not suppliedAccessories Supplied with Unit Table Optional Copper Tubing KitInstallation Site Selection Additional Materials Required for InstallationSolid base must not cover the hole of the bottom plate Remove the Rear Panel from the Unit How to Install the Indoor UnitTrical wiring or conduits are Make a HoleIf Block, Brick, Concrete or Similar Type Wall Install the Rear Panel on the WallIf Wooden Wall How to replace the grille Remove the Grille to Install the Indoor UnitHow to remove the grille Wiring Instructions General precautions on wiring Shape the Indoor Side TubingRecommended Wire Length and Diameter AWGWiring Instructions for Inter-unit Connections For stranded wiring How to connect wiring to the terminal For Indoor UnitFor Outdoor Unit For solid core wiring or F-cable Mounting Right-side tubingDrain cap Switching drain hose and drain capLeft-side tubing To unmount indoor unit Do not supply power toTubing and wiring to the out Unit or operate it until allWiring Instructions for the Outdoor Unit How to Install the Outdoor UnitFirst refer to . Installation Site Selection Refrigerant Tubing Flaring Procedure with a Flare ToolTo 0.5 mm Adjust so that the amount of tube Use of the Flaring MethodInsulation of Refrigerant Tubing Connecting Tubing between Indoor and Outdoor UnitsFinishing the Installation To prevent heat loss and wet floors due to dripping of conAir Purging Attempting to turn the valve Be sure to completely insertHex wrench before How to Test Run the Air Conditioner Stem, use the accessory Basic Functions of the Service ValvesWhen opening or clos Ing the service valve Pump DownRemote Control Unit Installation Position Mounting on a WallAddress Switch Address Setting of the Remote Control Unit