Sanyo SAP-KRV94EHDX service manual Case Refrigerant is Leaking, Welding leaking points

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12-6. In Case Refrigerant is Leaking

CAUTION

(1) Detecting Leaks

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.

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.

(1) Detect leaks

OK

(2)Recover refrigerant

OK

(3)Weld leaking points

OK

(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 25L/min. and ultimate vacuum pressure rate of 0.05Torr:

(4)Check for sealing

OK

(5)Evacuation

OK

(6) Recharge

Standard time for evacuation

Length of tubing

Less than 10 meters

More than 10 meters

 

 

 

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 DC Inverter Split System AIR Conditioner Table of Contents Checking Electrical Components For safe installation and trouble-free operation, you Must Please Read Before StartingOperating Range Unit Specifications Indoor Unit SAP-KRV94EHDXSAP-KRV124EHDX Outdoor Unit SAP-CRV124EHDXMajor Component Specifications SAP-KRV94EHDXCB-KRV124EHDX Outdoor Unit CB-CRV124EHDX Other Component Specifications Dimensional Data Dia .35 1/4 Insulation of Refrigerant Tubing Refrigerant Flow DiagramRefrigerant Flow Diagram Indoor Unit SAP-KRV94EHDX Outdoor Unit SAP-CRV94EHDXTemperature Charts Performance DataIndoor Unit SAP-KRV124EHDX Outdoor Unit SAP-CRV124EHDX Air Throw Distance Charts Indoor Unit SAP-KRV124EHDX Cooling Electrical CharacteristicsHeating Outdoor Unit Indoor Unit Electric Wiring DiagramsSAP-CRV94EHDX SAP-KRV94EHDX SAP-CRV124EHDX SAP-KRV124EHDX Installation Site Selection About Recommended Wire Length and Diameter Wiring System DiagramRemote Control Unit Installation Position Mounting on a WallHow to Test Run the Air Conditioner ON/OFFHow to remove the grille Remove the Grille to Install the Indoor UnitHow to replace the grille Address Setting of the Remote Control Unit MaintenanceSwitching the remote controller address Removing and Mounting the Drain Hose Removing the Electrical Component Box Page Removing the Panel Motor Removing and Mounting the Drain Pan Air Outlet Assy Removing the Drain Pan Air Outlet AssyMounting the Drain Pan Air Outlet Assy Water in the drain panRemoving the Negative Ion Generator Removing the Fan Motor Removing and Mounting the Fan MotorMounting the Fan Motor Removing the Fan 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 preventionMode Heating Mode CoolingNon-Stop Defrosting Precautions before Performing Inspection or Repair TroubleshootingMethod of Self-Diagnostics Self-diagnostics Lamps ION Timer OperationChecking the Indoor and Outdoor Units Remedy for symptom 3 to Diagnostic procedureDiagnostic results Trouble Diagnosis of Indoor and Outdoor Fan MotorOutdoor Fan Motor Noise malfunction Noise Malfunction and Electromagnetic InterferenceElectromagnetic interference Upper right screw Grille Screw Flap Screw cover Making a Diagnosis of the Panel Motor Checking Electrical Components Measurement of Insulation ResistanceChecking Continuity of Fuse on PCB Assy Checklist before Servicing Refrigerant R410A Special Precautions When Servicing UnitCharacteristics of New Refrigerant R410A Size of flareNo use of refrigerant other than R410A Tubing precautionsNo addition of compressor oil for R410A If refrigerant R410A is exposed to fireFor servicing, use the following tools for R410A Tubing Installation ProceduresTools Specifically for R410A Tool Distinction Tool NameProcedure for Replacing Compressor Case of Compressor MalfunctionNever charge a large amount Configuration and characteristics of cylindersRecharging Unit. This may causeCase Refrigerant is Leaking Welding leaking pointsRetro-Fitting Existing Systems When Tubes are ExtendedCharging Additional Refrigerant Use of Existing UnitsOI-852-6-4180-791-00-0 Features Child LockAlert Symbols ContentsProduct Information Safety Instructions Installation LocationElectrical Requirements Names of Parts Unit Display and Operation Button Remote Control Unit Display Remote Control Unit DRY AutoHeat CoolUsing the Remote Control Unit ONE TIME/EVERYDAYRemote control unit mount Mounting screws 4 x 16 included Using the Remote Control UnitControl Unit Step Operation with the Remote Control UnitStep Press the ON/OFF operation buttonOperation with the Remote Control Unit Cover closed Cover opened StepAdjusting the Fan Speed Setting Cooling and DRY ModeNight Setback Mode is used for saving energy Setting TemperatureQuiet Mode Special Remarks Example To set to Setting the TimerOperation Indication 2230 610 2000 Present time Setting the TimerTo cancel a timer program Press the Cancel button OFFCancellation procedure Using the 1.2.3.5-Hour OFF TimerSetting procedure Operation together with the Daily ON/OFF Repeat TimerSweep Adjusting the Airflow DirectionFAN Heat Care and Cleaning Indoor UnitRemounting the front panel Care and CleaningHow to replace the anti-mold FilterHow to clean the air clean filter Negative ion generator metal electrodes inside plastic caseOperating Range TroubleshootingTrouble Possible Cause Remedy Osaka, Japan Sept

SAP-KRV94EHDX specifications

The Sanyo SAP-KRV94EHDX is a cutting-edge split-type air conditioning unit that exemplifies advanced technology and efficiency. Designed for both residential and commercial spaces, this model is equipped with features that cater to various cooling and heating needs.

One of the main highlights of the Sanyo SAP-KRV94EHDX is its energy efficiency. With a high Energy Efficiency Ratio (EER), this unit minimizes energy consumption while maximizing cooling performance. This not only results in lower electricity bills but also contributes to a reduced carbon footprint, making it an environmentally friendly choice for users.

The SAP-KRV94EHDX employs inverter technology, which allows the compressor to adjust its speed dynamically based on the temperature requirements of the environment. This means that the unit operates more quietly and uses less energy when maintaining a consistent temperature. The inverter system ensures that the air conditioner can quickly reach the desired cooling or heating temperature and maintain it without the frequent on-off cycles typical of traditional units.

Additionally, the air conditioning unit comes with a powerful cooling capacity, effectively managing larger spaces. It can easily handle varying ambient conditions while providing rapid cooling in extremely warm weather, making it perfect for areas with hot climates.

Other notable features include a user-friendly remote control, allowing users to adjust settings from a distance effortlessly. The unit also incorporates a multi-stage air filtration system designed to remove dust, allergens, and other airborne particles, contributing to better indoor air quality.

The Sanyo SAP-KRV94EHDX is not just about functionality; it also boasts a sleek and modern design that blends seamlessly with various interior aesthetics. Its quiet operation ensures that it does not disturb daily activities, making it suitable for bedrooms, offices, and living spaces.

Moreover, the unit comes with various operational modes, including cooling, dehumidification, and a heating function. This versatility makes the SAP-KRV94EHDX an all-season solution for climate control.

In summary, the Sanyo SAP-KRV94EHDX is a top-tier air conditioning unit that combines efficiency, advanced technology, and user convenience. Its inverter technology, multi-stage air filtration, and modern design make it a reliable choice for anyone seeking comfort throughout the year.
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