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Panasonic CU-5E36QBU service manual Cooling overload control Cool, Heating overload control Heat

Models: CU-5E36QBU

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13.5 Cooling overload control (Cool)

13.5 Cooling overload control (Cool)

∙This control detect outdoor pipe temperature and perform the compressor frequency restriction during cooling operation.

13.6 Heating overload control (Heat)

∙This control detect indoor pipe temperature and perform the compressor frequency restriction during heating operation.

∙This control detect outdoor ambient temperature and perform the fan speed adjustment during heating operation.

13.7 Extreme Low Temperature Compressor low pressure protection control (Heat)

∙This control is to prevent low pressure drops too low during extremely low outdoor ambient temperature to improve the compressor reliability.

∙During heating operation, when outdoor ambient temperature is in Zone 1, this control will be activated. Compressor frequency restriction will be based on outdoor piping temperature.

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Panasonic CU-5E36QBU service manual Cooling overload control Cool, Heating overload control Heat

Contents

PRECAUTION OF LOW TEMPERATURE Air Conditioner Outdoor Unit CU-5E36QBUDestination U.S.A Canada Order No: PAPAMY1312037CETABLE OF CONTENTS 1. Safety Precautions 18.For R410A models, when connecting the piping, do not use any existing R22 pipes and flare nuts. Using such same may cause abnormally high pressure in the refrigeration cycle piping, and possibly result in explosion and injury. Use only R410A materials Unit 2. SpecificationsItem OUTDOOR UNITOUTDOOR UNIT ItemUnit Dry Bulb∙Multi Split Combination Possibility ∙Outdoor Unit : CU-5E36QBU 3. Dimensions 4. Refrigeration Cycle Diagram 5. Block Diagram Resistance of Compressor Windings WiringRECTIFICATION CIRCUIT SWITCHING POWER SUPPLY CIRCUIT7. Electronic Circuit Diagram 8. Printed Circuit Board 8.1Main Printed Circuit Board8.2Noise Filter Printed Circuit Board 8.3Display Printed Circuit Board9. Installation Information 9.1Check Points10. Installation Instruction 10.1 Select The Best LocationOutdoor Unit Installation Guidelines 10.2 Install The Outdoor Unit10.3 Connect The Piping Gas Leak Checking10.4 Evacuation Of The Equipment CUTTING AND FLARING THE PIPING10.5Connect The Cable To The Outdoor Unit 10.6Heat Insulation10.7Disposal Of Outdoor Unit Drain Water 11.1 Cooling Operation 11.1.3Cooling Powerful Operation11. Operation Control 11.1.1Outdoor fan control11.2.1Outdoor fan control 11.2.3Powerful Operation11.2 Heating Operation 11.2.2Heating Room Temp Sampling Control12. Simultaneous Operation Control 13.2 Dew Prevention control Cool 13. Protection Control13.1 Freeze Prevention control Cool 13.5 Cooling overload control Cool 13.6 Heating overload control Heat13.8 Deice Control 13.9 Time Delay Safety Control Restart Control13.12 IPM power transistor Protection Control 13.10 30 seconds Force Operation13.15 Valve close detection control 14.1.2Test Run Operation 14. Servicing Mode14.1.1Pump down operation SW1 14.1.5Mode priority function 14.1.3Wiring Error Check14.1.4Power Save Mode 14.1.6Cooling only function15. Troubleshooting Guide 15.1 Self Diagnosis FunctionPage Page 16.1.1Removing the Cabinet Top Plate 16. Disassembly and Assembly Instructions16.1 Outdoor Unit Removal Procedure Fig.4.Remove the particular plate remove the 8 screws 16.1.3Removing the Cabinet Front Plate3.Remove the particular plate remove the 3 screws Fig.16.1.4Removing the Control P.C. Board 16.1.5Removing the Propeller Fan and Fan Motor∙Cooling Characteristic 17. Technical Data17.1 Operation Characteristics 17.1.1One Indoor Unit Operation∙Cooling Characteristic Piping Length: 7.5m 24.6 ft 230V 60Hz∙Cooling Characteristic Piping Length: 7.5m 24.6 ft 230V 60Hz∙Cooling Characteristic Piping Length: 7.5m 24.6 ft 230V 60Hz∙Heating Characteristic Piping Length: 7.5m 24.6 ft 230V 60Hz∙Heating Characteristic Piping Length: 7.5m 24.6 ft 230V 60Hz∙Heating Characteristic Piping Length: 7.5m 24.6 ft 230V 60Hz∙Heating Characteristic Piping Length: 7.5m 24.6 ft 230V 60HzPiping Length: 7.5m 24.6 ft 230V 60Hz 17.1.2Two Indoor Unit Operation∙Cooling Characteristic ∙Cooling Characteristic Piping Length: 7.5m 24.6 ft 230V 60Hz∙Cooling Characteristic Piping Length: 7.5m 24.6 ft 230V 60Hz∙Cooling Characteristic Piping Length: 7.5m 24.6 ft 230V 60Hz∙Cooling Characteristic Piping Length 7.5m 24.6 ft 230V 60Hz∙Cooling Characteristic Piping Length: 7.5m 24.6 ft 230V 60Hz∙Heating Characteristic Piping Length: 7.5m 24.6 ft 230V 60Hz∙Heating Characteristic Piping Length: 7.5m 24.6 ft 230V 60Hz∙Heating Characteristic Piping Length: 7.5m 24.6 ft 230V 60Hz∙Heating Characteristic Piping Length: 7.5m 24.6 ft 230V 60Hz∙Heating Characteristic Piping Length: 7.5m 24.6 ft 230V 60Hz∙Heating Characteristic Piping Length 7.5m 24.6 ft 230V 60HzPiping Length: 7.5m 24.6 ft 230V 60Hz 17.1.3Three Indoor Unit Operation∙Cooling Characteristic ∙Cooling Characteristic Piping Length: 7.5m 24.6 ft 230V 60Hz∙Cooling Characteristic Piping Length: 7.5m 24.6 ft 230V 60Hz∙Cooling Characteristic Piping Length: 7.5m 24.6 ft 230V 60Hz∙Heating Characteristic Piping Length 7.5m 24.6 ft 230V 60Hz∙Heating Characteristic Piping Length: 7.5m 24.6 ft 230V 60Hz∙Heating Characteristic Piping Length: 7.5m 24.6 ft 230V 60Hz∙Heating Characteristic Piping Length: 7.5m 24.6 ft 230V 60HzPiping Length: 7.5m 24.6 ft 230V 60Hz 17.1.4Four Indoor Unit Operation∙Cooling Characteristic ∙Heating Characteristic Piping Length: 7.5m 24.6 ft 230V 60HzPiping Length: 7.5m 24.6 ft 230V 60Hz 17.1.5Five Indoor Unit Operation∙Cooling Characteristic ∙Heating Characteristic Piping Length 7.5m 24.6 ft 230V 60Hz18. Exploded View and Replacement Parts List DESCRIPTION & NAME SAFETYREF.NO CU-5E36QBUREF.NO PAPAMY Printed in Malaysia FY1213-0SAFETY DESCRIPTION & NAME