Panasonic CU-2E18NBU service manual š Multi split combination possibility

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Item

Unit

 

OUTDOOR UNIT

 

 

 

 

 

 

 

Air Volume

High

m3/min (ft3/min)

 

37.2 (1313)

Refrigerant Control Device

 

 

 

 

Expansion Valve

 

 

 

 

 

 

 

Refrigerant Oil

 

 

 

 

FV50S

 

 

 

 

 

 

 

Refrigerant (R410A)

 

 

g (oz)

 

1.92k (67.8)

 

 

 

 

 

 

 

 

 

 

 

Dry Bulb

 

Wet Bulb

 

 

 

 

 

 

 

 

Cooling

Maximum

°C (°F)

32 (89.6)

 

23 (73.4)

 

 

 

 

 

 

Indoor Operation Range

Minimum

°C (°F)

16 (60.8)

 

11 (51.8)

 

 

 

 

 

 

 

 

Heating

Maximum

°C (°F)

30 (86.0)

 

 

 

 

 

 

 

 

 

 

Minimum

°C (°F)

16 (60.8)

 

 

 

 

 

 

 

 

 

 

 

 

Cooling

Maximum

°C (°F)

43 (109.4)

 

26 (78.8)

 

 

 

 

 

 

Outdoor Operation Range

Minimum

°C (°F)

16 (60.8)

 

11 (51.8)

 

 

 

 

 

 

 

 

Heating

Maximum

°C (°F)

24 (75.2)

 

18 (64.4)

 

 

 

 

 

 

 

 

 

Minimum

°C (°F)

-15 (5.0)

 

-16 (3.2)

 

 

 

 

 

 

 

 

 

 

Note

šSpecifications are subject to change without notice for further improvement.

šMulti split combination possibility:

oA single outdoor unit enables air conditioning of up to two separate rooms for CU-2E18NBU.

Wall

2.8 kW

3.2 kW

 

 

 

Capacity range of connectable indoor units

Length

1 room maximum pipe length (m (ft))

Allowable elevation (m (ft))

 

Piping

Total allowable pipe length (m (ft))

Total pipe length for maximum chargeless length (m (ft))

 

 

Additional gas amount over chargeless length (g/m (oz/ft))

 

 

 

Outdoor Unit

 

CU-2E18NBU

 

A

 

B

 

 

CS-E9NKUAW

 

CS-E12NKUAW

 

From 5.6 kW to 6.4 kW

25 (82.0)

15 (49.2)

50 (164.0)

20 (65.6)

20 (0.2)

Note: “” : Available

Remarks for CU-2E18NBU

1.At least two indoor units must be connected.

2.The total nominal cooling capacity of indoor untis that will be connected to outdoor unit must be within connectable capacity range of indoor unit.

(as shown in the table above)

Example: The indoor units’ combination below is possible to connect to CU-2E18NBU. (Total nominal capacity of indoor units is between

5.6 kW to 6.4 kW)

1)Two CS-E9NKUAW only. (Total nominal cooling capacity is 5.6 kW)

2)One CS-E9NKUAW and one CS-E12NKUAW. (Total nominal cooling capacity is 6.0 kW)

šSpecifications are subject to change without notice for further improvement.

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Contents CU-2E18NBU Disassembly and Assembly Instructions Safety Precautions Page Specifications CU-2E18NBUš Multi split combination possibility Volume Dimensions Refrigeration Cycle Diagram Block Diagram Wiring Connection Diagram Electronic Circuit Diagram Printed Circuit Board Main Printed Circuit BoardPage Installation Information Check PointsInstallation Instruction Select The Best LocationOutdoor Unit Install The Outdoor Unit Connect the PipingEvacuation of the Equipment Cutting and Flaring the PipingConnect The Cable To The Outdoor Unit Heat InsulationOutdoor fan control Operation ControlCooling Operation Annual Cooling controlPowerful Operation Heating OperationOperation mode priority control Simultaneous Operation ControlProtection Control Electronic Parts Temperature Rise Protection 1 CoolElectronic Parts Temperature Rise Protection 2 Cool Freeze Prevention control CoolCooling overload control Cool Heating overload control HeatDeice Control Time Delay Safety Control Restart ControlIPM power transistor Protection Control 13.10 30 seconds Force OperationCompressor Protection Control Gas leak detection control Valve close detection controlCompressor discharge high pressure protection control Pump down operation SW1 Servicing Mode14.1 CU-2E18NBU Test Run operationMode priority function Wiring Error checkPower Save Mode Cooling only functionTroubleshooting Guide Self Diagnosis FunctionPage Page Removing the Cabinet Top Plate and Cabinet Front Plate Disassembly and Assembly InstructionsOutdoor Unit Removal Procedure Remove the Control Board Cover and Particular PlatesRemoving the Control P.C. Board Removing the Propeller Fan and Fan MotorPage Technical Data Operation CharacteristicsOne Indoor Unit Operation 133.000 128.000 100 105 110 115 Outdoor Air Temperature F š Piping Length Characteristic Cooling š Piping Length Characteristic Cooling š Heating Characteristic š Heating Characteristic š Piping Length Characteristic Heating š Piping Length Characteristic Heating Two Indoor Unit Operation CapacitykW š Cooling Characteristic š Piping Length Characteristic Cooling š Piping Length Characteristic Cooling š Piping Length Characteristic Cooling š Heating Characteristic š Heating Characteristic š Heating Characteristic š Piping Length Characteristic Heating š Piping Length Characteristic Heating š Piping Length Characteristic Heating Exploded View and Replacement Parts List REF. no Description & Name ’TY CU-2E18NBU Remark Accessory CO. Drain Elbow

CU-2E18NBU specifications

The Panasonic CU-2E18NBU is a highly efficient outdoor unit designed for residential and commercial applications, providing reliable heating and cooling year-round. This unit is part of Panasonic's extensive range of HVAC solutions, known for their innovation and energy efficiency.

One of the standout features of the CU-2E18NBU is its advanced inverter technology. This technology allows the system to adjust the compressor speed based on the temperature demand, resulting in reduced energy consumption and enhanced comfort. By continuously varying the output, the inverter system maintains a consistent indoor climate without the frequent on/off cycles typical of conventional systems. This not only saves energy but also extends the lifespan of the unit.

The CU-2E18NBU is designed to operate efficiently in a wide range of conditions, showcasing excellent performance in harsh climates. With a capacity of 18,000 BTU, it can efficiently cool or heat spaces effectively, making it suitable for medium-sized rooms or multiple areas when paired with compatible indoor units.

Another significant characteristic of this Panasonic model is its environmentally friendly refrigerant, R32. This refrigerant has a lower impact on global warming and ozone depletion compared to older options, making the CU-2E18NBU a smart choice for eco-conscious consumers. R32 also enhances the system's efficiency, further contributing to lower energy costs.

The unit features a robust construction, allowing it to withstand outdoor conditions while promoting durability. Its compact design allows for flexible installation options, making it easier to fit in various environments without compromising aesthetic appeal.

Moreover, the CU-2E18NBU incorporates advanced air filtration and purification technologies, improving indoor air quality. The filters are designed to capture dust, allergens, and other particulates, ensuring cleaner, healthier air.

In summary, the Panasonic CU-2E18NBU stands out for its efficient inverter technology, environmentally friendly refrigerant, and compact, durable design. With its ability to provide consistent temperature control and improve indoor air quality, this unit is a reliable solution for anyone looking to enhance their heating and cooling systems.