Panasonic CS-W34BD2P + CS-W43BD2P Series Service Manual & Repair Guide

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2.2.

New low-noise outdoor units

[Product features]

2.2.1.

Low-noise design improves in surrounding areas

2. The adoption of double-orifice rings reduces air passage resistance. 3. Strengthening of the noise insulation materials in the compressor and the sealing-in of mechanical noise allows vibration noise to be greatly enclosed and suppressed. 4. The heat exchanger has an L-shaped design to allow air to flow more smoothly. 5. Noise is automatically reduced further during night time operation with lower outdoor air temperatures.

1. The noise-suppressing winglet fan is a result of new research into vane design theory. The unique curved shape suppresses the generation of vortexes, thus reduces air flow noise.

2.2.2.

Automatic restart function

When the electric power resumes after a power failure, the unit will automatically restarts the operation in the pre-failure mode.

2.2.3.

Low ambient cooling operation

Cooling operation is possible at outdoor temperature of -5°C.

2.3.

Greatly improved workability increases system renewal capability

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2.3.1.

Pipes that are one size larger can also be connected for renewal

2.3.6.

Long pipe design
24BB~43BB 30/50

· If renewing the system, existing refrigerant pipes can be utilized so that only the indoor units need to be replaced.

Max piping length: 50 (m) Height difference/equivalent pipe length

2.3.7.

Internal pipe connection

· Pipes are connected inside the units (inside the side covers), making the final appearance more attractive. · Pipes can be diverted outward in any of four directions (forward, right, down, rear). · Small liquid pipe diameters of 9.52mm for 43BB model, making installation work much easier. s Liquid-side pipe diameters (mm): 9.52 (43BB~50BB models)

2.3.8.
· For example, liquid and gas pipes from 10 years ago can be connected to current pipes with the same size for one size larger. Effective utilization of materials reduces working time and trouble. (Adaptor sockets are not supplied.)

Centralized draining method

· Even when multiple outdoor units are installed to a wall, the drain outlets can be concentrated into a single drain pipe. This makes installation easier and also improve appearance.

2.3.2.

Additional refrigerant charging unnecessary for 30 m

· All models do not require any additional charging of refrigerant for 30 m of pipe length. This makes installation much easier.

2.3.3.

Drain water dripping-prevention structure

· The base of the outdoor unit is provided with a single drain hole in order to prevent drain water from leaking out of the unit. Body connecting a drain elbow and a discharge pipe, water leakages can be prevented even when the unit is installed against a wall.

2.4.
2.4.1.

A brand-new control method using the latest in technology
Power supply wiring is also easier

Power supply wiring and other wiring tasks can be carried out more easily. · Twin non-polar wires used to connect indoor and outdoor units. · Adoption of connection error prevention circuits for drives wires and signal wires. If a connection error is made, the relay does not operate and current does not flow to the circuit boards.

2.3.4.

Space saving design allows units to be installed side by side continuously

· Servicing after installation can be carried-out by removing the front covers.

2.3.5.

Easy test operation

· Test operation can be carried out for both indoor and outdoor units.

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2.4.2.

Separate indoor/outdoor unit power supplies

2.4.3.

The power supply can be connected to (1) just the outdoor units, or (2) to both indoor and outdoor units.

Automatic setting initialization function (Remote control and Indoor unit)

In accordance with the indoor and outdoor units connected and the connection methods, conditions such as the configuration (twin or triple format) and remote-control functions such as cooling only or heat pump model are automatically detected and set instantly.

2.4.4.

Group control equipment

2.4.5.

Twin operation

2.5.
2.5.1.

· Simultaneous air conditioning of wide spaces and corners is possible. Indoor units of different horsepowers and models can even be used in combination. · Master unit and slave-units can be set automatically in twin systems. No address setting is necessary. · Multiple indoor units can be operated simultaneously with a single remote control. Note that individual operation is not possible.

New refrigerant Series [R407C] pipe installation
Procedure

· The new refrigerant (R407C) has a different composition to the previously-used refrigerant (R22), so some contents and method of pipe installation and charging work are different from before. Care should be taken when carrying out this work.

2.5.2. 2.5.2.1.

Installation and precautions Before installation

1. Determine the installation division. 2. Check the refrigerant to be used. · Check that the refrigerant is R407C. · Check that the gauge pressure is at a maximum of 3.3 MPa. 3. Make a drawing of the Installation.

2.5.2.2.

Installation

1. Install the sleeve and the insert. 2. Install the indoor unit. 3. Install the refrigerant piping. · Pipe materials · Refrigerant pipes which were previously used to carry R22 must not be re-used. If replacing the indoor and outdoor units, be sure to replace all refrigerant pipes also. · Check the pipe thickness. · Clean the inside of the pipes.

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