Sanyo CH2472, CH1872 service manual Please Read Before Starting

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IMPORTANT!

Please Read Before Starting

This air conditioning system meets strict safety and operating standards. As the installer or service person, it is an important part of your job to install or service the system so it operates safely and efficiently.

For safe installation and trouble-free operation, you must:

Carefully read this instruction booklet before beginning.

Follow each installation or repair step exactly as shown.

Observe all local, state, and national electrical codes.

Pay close attention to all warning and caution notices given in this manual.

This symbol refers to a hazard

or unsafe practice which can WARNING result in severe personal injury

or death.

This symbol refers to a hazard or unsafe practice which can

CAUTION result in personal injury or prod- uct or property damage.

If Necessary, Get Help

These instructions are all you need for most installation sites and maintenance conditions. If you require help for a special problem, contact our sales/service outlet or your certified dealer for additional instructions.

In Case of Improper Installation

The manufacturer shall in no way be responsible for improp- er installation or maintenance service, including failure to follow the instructions in this document.

SPECIAL PRECAUTIONS

WARNING

When Wiring

 

ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. ONLY A QUALIFIED, EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM.

Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked.

Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death.

Ground the unit following local electrical codes.

Connect all wiring tightly. Loose wiring may cause over- heating at connection points and a possible fire hazard.

When Transporting

Be careful when picking up and moving the indoor and out- door units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin alu- minum fins on the air conditioner can cut your fingers.

When Installing…

…In a Ceiling or Wall

Make sure the ceiling/wall is strong enough to hold the unit’s weight. It may be necessary to construct a strong wood or metal frame to provide added support.

…In a Room

Properly insulate any tubing run inside a room to prevent “sweating” that can cause dripping and water damage to walls and floors.

…In Moist or Uneven Locations

Use a raised concrete pad or concrete blocks to provide a solid, level foundation for the outdoor unit. This prevents water damage and abnormal vibration.

…In an Area with High Winds

Securely anchor the outdoor unit down with bolts and a metal frame. Provide a suitable air baffle.

…In a Snowy Area (for Heat Pump-type Systems)

Install the outdoor unit on a raised platform that is higher than drifting snow. Provide snow vents.

When Connecting Refrigerant Tubing

Use the flare method for connecting tubing.

Apply refrigerant lubricant to the matching surfaces of the flare and union tubes before connecting them, then tighten the nut with a torque wrench for a leak-free connection.

Check carefully for leaks before starting the test run.

When Servicing

Turn the power OFF at the main power box (mains) before opening the unit to check or repair electrical parts and wiring.

Keep your fingers and clothing away from any moving parts.

Clean up the site after you finish, remembering to check that no metal scraps or bits of wiring have been left inside the unit being serviced.

Others

CAUTION

Ventilate any enclosed areas when installing or testing the refrigeration system. Escaped refrigerant gas, on contact with fire or heat, can produce dangerously toxic gas.

Confirm upon completing installation that no refrigerant gas is leaking. If escaped gas comes in contact with a stove, gas water heater, electric room heater or other heat source, it can produce dangerously toxic gas.

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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 TempSpecifications Unit SpecificationsKHS1872 CH1872208V KHS2472 CH247212.1 13.5 Major Component Specifications Indoor UnitCB-KHS2472 Microprocessor 250V 3A Outdoor Unit Outdoor Unit CH1872Compressor External FinishOutdoor Unit CH2472 Other Component Specifications Indoor heat exchanger sensorCompressor temp sensor Outdoor air temp sensorDimensional Data Indoor Unit KHS187211-17/32 23-15/16 35-7/16900 Refrigerant Flow Diagram Refrigerant Flow DiagramInsulation of Refrigerant Tubing After a tube has been insulated To break or crackTemperature Charts Low pressure performance chartOperating current 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 Heating Capacity Power Supply 230V Single Phase 60Hz Heating CapacityTH Total Heating Capacity BTU/h 29,000 BTU/h Air Throw Distance Charts Cooling Vertical distance ftRoom air temp F 26.7C Fan speed High Horizontal distance ft Heating Vertical distance ftHeating Electrical Characteristics Electrical DataCH1872 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 Disconnect How to ConnectFunctions Operation FunctionsEmergency operation Auto cooling/heating operationTimer backup Lamp colorsCompressor discharge temperature control Protective FunctionsOverload 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 Serial Communication Error Identification Procedure Off Blinking IlluminatedBefore the Operation Condition E01Terminal board Outdoor Unit Condition E12 Trouble Diagnosis of Fan Motor Indoor Fan MotorOutdoor Fan Motor Noise Malfunction and Electromagnetic Interference Noise malfunctionElectromagnetic interference Locations most susceptible to noise Trouble CorrectionPower Supply Cord Checking Electrical ComponentsMeasurement of Insulation Resistance Measurement of Insulation Resistance for Electrical PartsChecking Continuity of Fuse on PCB Assy Refrigerant R410A Special Precautions When Servicing Unit Characteristics of New Refrigerant R410AWhat is New Refrigerant R410A? CharacteristicsChecklist before Servicing Tubing Installation Procedures Tools Specifically for R410AProcedure for Replacing Compressor Case of Compressor MalfunctionNever charge a large amount Unit. This may causeDamage to the compressor ExampleWelding leaking points Case Refrigerant is LeakingRecharging When Tubes are Extended Charging Additional RefrigerantRetro-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 Unit Display and Operation Button Quiet lampRemote Control Unit Display Remote Control Unit HR. Timer buttonAdvance button TransmitterQuiet button FAN Speed selector buttonUsing the Remote Control Unit Temperature Display SelectorHow to Install Batteries Button Time Display Selector buttonUsing the Remote Control Unit Operation with the Remote Control Unit Press the ON/OFF operation buttonOperation with the Remote Control Unit Press the Mode selector button and select the desired modePress the TEMP. setting buttons to change the temperature 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 Example To set to 1030 pm Setting the TimerOperation Indication Setting the Timer How to set the on time Example To start operation at 710 amTo cancel a timer program Press the Cancel button 1030 pm 710 am 1100 am Present timeUsing the 1-Hour OFF Timer Setting procedureCancellation procedure Operation together with the Daily ON/OFF Repeat TimerAdjusting the Airflow Direction Setting the airflow manuallyHorizontal Sweep functionCare and Cleaning Operation without the Remote Control UnitWhen the air conditioner is not running Care and Cleaning CleaningGrasp both ends of the air Intake grilleFollow the steps below when the generator has become dirty Negative ion generator metal electrodes inside plastic caseTroubleshooting Operating RangeTrouble Possible Cause Remedy Max DB / 71 F WB Min DB / 57 F WBAppendix B Installation Instructions Installation Instructions ContentsPlease Read Before Starting Tools Required for Installation not supplied Accessories Supplied with Unit TableGeneral Optional Copper Tubing KitInstallation Site Selection Additional Materials Required for InstallationSolid base must not cover the hole of the bottom plate How to Install the Indoor Unit Trical wiring or conduits areRemove 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 Wiring Instructions General precautions on wiring Shape the Indoor Side TubingRecommended Wire Length and Diameter AWGWiring 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 Mounting Right-side tubingLeft-side tubing Switching drain hose and drain capDrain cap Do not supply power to Tubing and wiring to the outTo 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 Flaring Procedure with a Flare Tool To 0.5 mm Adjust so that the amount of tubeRefrigerant Tubing Use of the Flaring MethodConnecting Tubing between Indoor and Outdoor Units Finishing the InstallationInsulation 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 Basic Functions of the Service Valves When opening or clos Ing the service valveStem, use the accessory Pump DownRemote Control Unit Installation Position Mounting on a WallAddress Switch Address Setting of the Remote Control Unit