Outdoor Unit CU-4KS31NBU 8FA2-5251-11400-1 | Panasonic guide

Outdoor Unit CU-4KS31NBU

8FA2-5251-11400-1

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Panasonic service manual Outdoor Unit CU-4KS31NBU 8FA2-5251-11400-1

Contents

DC Inverter MULTI-SYSTEM AIR Conditioner Safety Precautions Prohibit Table of Contents Appendix a Wall Mounted Type Semi-Concealed Type Operating Range Unit Specifications Outdoor Unit CU-3KS19NBUIndoor Unit CS-MKS9NKU × Duct Less Type Rated Outdoor Unit Indoor Unit 208V CU-4KS24NBU BTU/h/W Compressor Locked Rotor Amperes 20,600 CU-4KS31NBU Indoor Unit CS-MKS9NKU 4units Outdoor Unit CU-4KS31NBU 1unit 24,200 Major Component Specifications Outdoor Unit Outdoor Unit CU-4KS24NBU Outdoor Unit CU-4KS31NBU Other Component Specifications CU-3KS19NBU CU-4KS24NBU CU-4KS31NBU Dimensional Data Unit inchmm 852-0-0010-20500-0 Unit inchmm 852-0-0010-20600-0 Refrigerant Flow Diagram Insulation of Refrigerant TubingIndoor unit Outdoor unit Indoor unit Outdoor unit 1/4 Strainer Header Sub Main Compressor Accumulator Temperature Charts CU-3KS19NBU Temperature ChartsOutdoor Unit CU-3KS19NBU Indoor Unit CS-MKS7NKU × Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS9NKU × Cooling Characteristics Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS12NKU × Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS18NKU × Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS9NB4U × Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS12NB4U × Outdoor Unit CU-3KS19NBU Indoor Unit CS-KS18NB4UW × Temperature Charts CU-4KS24NBU Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS7NKU × Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS9NKU × Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS12NKU × Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS18NKU × Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS24NKU × Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS9NB4U × Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS12NB4U × Outdoor Unit CU-4KS24NBU Indoor Unit CS-KS18NB4UW × Temperature Charts CU-4KS31NBU Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS9NKU × Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS12NKU × Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS18NKU × Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS24NKU × Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS9NB4U × Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS12NB4U × Outdoor Unit CU-4KS31NBU Indoor Unit CS-KS18NB4UW × Cooling Capacity Indoor Outdoor Power Supply 230V Single Phase 60Hz Cooling Capacity CS-MKS12NB4U × CS-MKS9NKU × CS-KS18NB4UW + CS-MKS12NB4U + CS-MKS12NB4U 30,600 BTU/h CS-MKS9NB4U × Cooling Capacity Low Ambient 15,180 18,570 19,250 25,420 19,410 19,360 24,830 19,520 24,260 30,760 22,560 28,790 22,730 Electric Wiring Diagrams Outdoor Unit CU-3KS19NBU 8FA2-5251-11800-1 Outdoor Unit CU-4KS24NBU 8FA2-5251-11600-1 Outdoor Unit CU-4KS31NBU 8FA2-5251-11400-1 Functions Explanation of Functions Cool Fluctuation fan DRY Low Ambient Cooling Operation Protective Functions Current ControlDescription of function Automatic frequency control Low Start Current Compressor Temperature ControlCurrent control Troubleshooting Before Calling for Service Precautions before Performing Inspection or Repair Location of the Error Monitor Lamps Trouble Diagnosis by Error Monitor LampsDisplay of the Error Monitor Lamps Checking the Outdoor System Work procedure Check items unit operationChecking the outdoor unit Problems of Each Part and Inspection Points Trouble Diagnosis of Each Part Inspection Points for Each Part Outdoor control circuit boardFuse Compressor Electric expansion valve CU-3KS19NBU MV0 MV1 MV2 CU-4KS24NBU MV3 CU-4KS31NBU Breaker Branch tubing temperature sensorRefrigerant gas pressure Diagnostic procedure Diagnostic resultsRemedy for symptom 3 to Trouble Diagnosis of Fan Motor Characteristics of New Refrigerant R410A What is New Refrigerant R410A?Characteristics Components mixing proportions Checklist before Servicing Tubing Installation Procedures Tools Specifically for R410A Procedure for Replacing Compressor Case of Compressor Malfunction Amount in the charging cylinder is less than 20% ExampleTo prevent the composition R410A from changing Welding leaking points Case Refrigerant is LeakingRecharging When Tubes are Extended Charging Additional RefrigerantRetro-Fitting Existing Systems Use of Existing Units 852-6-4190-581-00-1 Contents For Outdoor Unit Please Read Before Starting Fins of the outdoor unit. You may get injured ‡ 8VHWKHIODUHPHWKRGIRUFRQQHFWLQJWXELQJ General For wall-mounted units Installation Site SelectionFor ceiling-mounted cassette units H1, H2, H3, H4 Connecting indoor unit for CU-3KS19NBU Connecting Indoor UnitsConnecting indoor unit for CU-4KS24NBU 815.88mm Locally purchased Connecting indoor unit for CU-4KS31NBU CS-MKS24NKU Baffle Plate for the Outdoor Unit It is recommended to use baffle platesFront Back Air Intake Baffle Air Discharge Baffle Precautions for installation Outer Dimensions of Outdoor Unit CU-3KS19NBUCU-4KS24NBU CU-4KS31NBU Diagram of Outdoor Unit Installation Never install only a single indoor unit Flaring Procedure with a Flare Tool Installation ProcessUse of the Flaring Method To 0.5 mm Adjust so that the amount of tube Tubing Connections Insulation of Refrigerant Tubing To prevent heat loss and wet floors due to dripping of con For wall-mounted units For ceiling-mounted cassette units Air Purging Finishing the Installation Air Purging with a Vacuum Pump for Test Run External diameter of service port R410A 5/16 Adapter manual, and use the adapter correctly What is pump-down? Pump-down procedure Pump Down If pump-down is not possible General Precautions on Wiring Wiring InstructionsRecommended Wire Length and Diameter Disconnect switch may be required by national or local codes How to connect wiring to the terminal For Outdoor Unit For solid core wiring or F-cable For stranded wiring For Indoor Unit Wiring Instructions for the Outdoor Unit Indoor unit DIndoor unit B Indoor unit C Test Run Checking tubing and wiringPerforming a test run Connecting a Home Automation Device Installation Check Sheet DC1111-0