Panasonic CS-KE36NKU, CU-KE36NKU 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 Outdoor Model No Product Code No CS-KE30NKU + CU-KE30NKU CS-KE36NKU + CU-KE36NKUIndoor Model No Product Code No 852 360Safety Precautions Prohibit Table of Contents Checking Electrical Components Temperature Indoor Air Intake Temp Outdoor Air Intake Temp Operating RangeIndoor Unit SpecificationsUnit Specifications Outdoor Unit208V CS-KE36NKU 21.9 19.9 Indoor Unit Major Component SpecificationsIndoor Unit CS-KE30NKU Indoor Unit CS-KE36NKU CB-CS-KE36NKUBoard Outdoor UnitOutdoor Unit CU-KE30NKU CompressorOutdoor Unit CU-KE36NKU Other Component Specifications Dimensional Data Inchmm 194-00-1 Unit Indoor Unit CS-KE30NKU Outdoor Unit CU-KE30NKU Refrigerant Flow DiagramRefrigerant Flow Diagram Indoor unit Outdoor unitTemperature Charts Performance DataHigh pressure performance chart Indoor Unit CS-KE36NKU Outdoor Unit CU-KE36NKU Discharge 9535 8630 Indoor CS-KE30NKU Power Supply 230V Single Phase 60Hz Cooling CapacityCooling Capacity CU-KE30NKU34,000 BTU/h Cooling Capacity Low Ambient Outdoor30,900 30,870 30,800 30,710 30,590 30,400 30,210 Heating Capacity Power Supply 230V Single Phase 60Hz Heating CapacityTH Total Heating Capacity BTU/h 36,000 BTU/h Air Throw Distance Charts Cooling Voltage230V Cooling Electrical CharacteristicsElectrical Data Heating650 Electric Wiring Diagrams 8FA2-5251-12400-18FA2-5251-15200-0 ControllerEmergency 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 CU-KE36NKUOverload 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 Troubleshooting Before Calling for ServiceMethod of Self-Diagnostics Self-diagnostics Lamps Diagnosis ContentsReplace 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 OperationFrom the previous page a Alarm Code E07/P04/P05/P20/P27 Trouble Diagnosis of Fan Motor Indoor Fan MotorPin 1 Vcc brown Outdoor Fan MotorPin 3 Gnd blue Pin 2 PG whiteElectromagnetic 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 MalfunctionExample Configuration and characteristics of cylindersAmount in the charging cylinder is less than 20% To prevent the compositionWelding leaking points Case Refrigerant is LeakingRecharging Retro-Fitting Existing Systems When Tubes are ExtendedCharging Additional Refrigerant Use of Existing UnitsAppendix a Operating Instructions CS-KE30NKU CS-KE36NKUSafety Precautions FeaturesContents Product InformationElectrical Requirements Installation LocationSafety Instructions AvoidNames of Parts Unit Display and Operation ButtonRemote Controller Display SymbolsRemote Controller Mode selector button HR. Timer button 1-HOUR OFF TimerTemperature setting buttons Temp High Power button32 x 13/16 Using the Remote ControllerACL button 20 mmOperation with the Remote Controller Automatic OperationAutomatic fan speed Cooling and DRY ModeHeating Mode Manual fan speedHigh Power Mode Unoccupied Indication StatusSpecial Remarks Setting the Timer Operation IndicationTips for Energy Saving Using the 1-HOUR OFF Timer1030 pm 710 am 1100 am Present time Adjusting the Airflow Direction When the air conditioner is not runningRemoving and remounting the front panel How to replace the filterCleaning the main unit and Remote Controller Washing the front panel with waterOperating Range Wired Remote ControllerTrouble Possible Cause Remedy Specifications Model No Outdoor Unit Indoor UnitPage 852-6-4190-587-00-0 Installation Instructions Split System Air Conditioner ContentsPlease Read Before Starting Fins of the outdoor unit. You may get injured AccidentallyGeneral 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  Countermeasures against snow and wind Precautions for Installation in a Snowy Area $/,8,3?,4508-25=  $/,04.3?-8,,D,4+89 Unit inch 4922054=0/041,9-*04.52,9 Required space around the outdoor unit$/,-8544+5/90+,9398,30456,4 27-5/8 11-5/8 Air Intake 25/32 13/32 13-3/8 14-31/32 4522,8/4/,/,0./5-/,5+55840  #04.2,4004922054  9*2,9545/90+,9 #04.2,4004922054 Installation in front-rear rowsObstacles to the front and rear of unit  9*2,9545/90+,9Remove 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 Unit For stranded wiring Mounting  Right-side tubing Left-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 MethodRouting the Tubing and Wiring How to Install the Outdoor UnitWiring Instructions for the Outdoor Unit Cover BRefrigerant 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 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 Down Service Valve Connections Remote Controller Installation PositionAddress Switch Address Setting of the Remote ControllerDC1111-0

CS-KE30NKU, CS-KE36NKU, CU-KE30NKU, CU-KE36NKU specifications

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