Sanyo KHS3682 + CH3682, CH3082 Case Refrigerant is Leaking, Welding leaking points, Recharging

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10-6. In Case Refrigerant is Leaking

CAUTION

Never attempt to charge additional refrigerant when refrigerant has been leaking from the unit. Follow the procedure described below to locate points of leaks and carry out repairs, then recharge the refrigerant.

(1) Detecting Leaks

Use the detector for R410A to locate refrigerant leak points.

(2) Recovering refrigerant

Never release the gas to the atmosphere; recover residual refrigerant using the refrigerant recovery unit for R410A, instead.

Do not reuse the recovered refrigerant because its composition will have been altered.

(3) Welding leaking points

Confirm again that no residual refrigerant exists in the unit before starting welding.

Weld securely using flux and wax for R410A.

Prevent oxide film from forming inside the tubes utilizing substitution with nitrogen (N2) in the refrigerant circuit of the unit. Leave ends of tubes open during welding.

(4) Checking for sealing

Use nitrogen gas for the pressurized gas, and never use a refrigerant other than R410A. Also do not use oxygen or any flammable gas.

(5) Evacuation

Use a solenoid valve-installed vacuum pump so that even if power is cut off in the middle of evacuation of air due to a power interruption, the valve will prevent the pump oil from flowing back.

The equipment may be damaged if moisture remains in the tubing, thus carry out the evacuation thoroughly.

When using a vacuum pump with exhaust air volume more than 0.883 cu.ft./min. and ultimate vacuum pressure rate of 50 micron Hg.

(1) Detect leaks

OK

(2)Recover refrigerant

OK

(3)Weld leaking points

OK

(4)Check for sealing

OK

(5)Evacuation

OK

(6) Recharge

Standard time for evacuation

Length of tubing

Less than 33 ft. (10 m)

More than 33 ft. (10 m)

Evacuation time

More than 10 minutes

More than 15 minutes

(6) Recharging

Recharge unit in the same manner explained on the previous page "(5) Recharging."

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Contents Indoor Model No. Product Code No Destination North AmericaSafety Precautions Prohibit Table of Contents Checking Electrical Components Operating Range Indoor Air Intake Temp Outdoor Air Intake TempKHS3082 SpecificationsUnit Specifications CH3082208V KHS3682 CH368221.9 19.9 Major Component Specifications Indoor UnitCB-KHS3682 Microprocessor 250V 3A Board Outdoor UnitOutdoor Unit CH3082 CompressorOutdoor Unit CH3682 Other Component Specifications Dimensional Data Indoor Unit KHS3082Inchmm Refrigerant Flow Diagram Refrigerant Flow DiagramOperating current performance chart Temperature ChartsLow pressure performance chart Indoor discharge air performance chartHigh pressure performance chart Wide Outdoor inlet air D.B. temp. FC Cooling Capacity Indoor OutdoorCooling Capacity Indoor34,000 BTU/h Power Supply 230V Single Phase 60Hz Cooling Capacity IndoorHeating Capacity Power Supply 230V Single Phase 60Hz Heating CapacityTH Total Heating Capacity BTU/h 36,000 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 CH3082 Voltage230V Cooling Electrical CharacteristicsElectrical Data Voltage208V CoolingCH3682 Voltage230V Cooling KHS3082 KHS3682 Electric Wiring Diagrams8FA2-5250-70400-3 HIC Emergency operation FunctionsOperation Functions Auto cooling/heating operationTimer backup Lamp colorsNoise Reducing Control Outdoor Unit Switching Procedure to Noise Reducing ControlOperation Sound Description of function Maximum Current Value Change ProcedureMaximum Current Value Change Function CH3682Overload prevention during heating Compressor discharge temperature controlProtective Functions 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 ProcedureAlarm Code E05 Before the OperationTerminal board Outdoor Unit Alarm Code E07/P04/P05/P20/P27 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 ExampleWelding leaking points Case Refrigerant is LeakingRecharging Retro-Fitting Existing Systems When Tubes are ExtendedCharging Additional Refrigerant Use of Existing UnitsOI-852-6-4181-149-00-0 Mode D’EMPLOI Pub. OI-85264181149000 SanyoFeatures ContentsSafety Instructions Alert SymbolsInstallation Location Product InformationNames of Parts Unit Display and Operation ButtonRemote Control Unit Display SymbolsRemote Control Unit Mode selector button HR. Timer button 1-HOUR OFF TimerTemperature setting buttons Temp High Power buttonACL button Using the Remote Control UnitAir conditioner Indoor unit Receiver Remote control unit 16 mmOperation with the Remote Control Unit Automatic OperationAutomatic fan speed Cooling and DRY ModeHeating Mode Manual fan speedHigh Power Mode Unoccupied Indication StatusSpecial Remarks Setting the Timer Operation IndicationDo not Using the 1-HOUR OFF TimerTips for Energy Saving 1030 pm 710 am 1100 am Present timeCare and Cleaning Adjusting the Airflow DirectionOperation Without the Remote Control Unit When the air conditioner is not runningHow to clean the air clean filter Air Clean FilterHow to install the air clean filter Cleaning the main unit and remote control unitOperating Range TroubleshootingWired Remote Controller Washing the front panel with waterAppendix 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 Precautions for Installation in a Snowy Area Countermeasures against snow and windUnit inch Required space around the outdoor unit Installation with intakes facing outletsFront and both sides must remain open Unit Multiple-unit installation 2 or more units Top is open Single-unit installationObstacle to the front of unit Installation in front-rear rows Obstacles to the front and rear of unitRemove 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 Hole DiaHow to remove the grille Removing and Installing the GrilleHow to replace the grille Wiring Instructions General precautions on wiring Shape the Indoor Side TubingWire Size and Length Wiring 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 To unmount indoor unit Do not supply power toTubing and wiring to the out Frame Fastening MethodWiring Instructions for the Outdoor Unit How to Install the Outdoor UnitFirst refer to . Installation Site Selection Routing the Tubing and WiringUse of the Flaring Method Flaring Procedure with a Flare ToolRefrigerant Tubing If the special R410A flare tool is usedInsulation of Refrigerant Tubing Connecting Tubing between Indoor and Outdoor UnitsFinishing the Installation Taping the TubesAir 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 Pump DownService Valve Connections Remote Control Unit Installation PositionAddress Switch Address Setting of the Remote Control Unit