PANASONIC CU-3E18JBE (02) PDF Document

The following safety precautions must be followed for the PANASONIC CU-3E18JBE:

1. Do not modify the machine, parts, or materials during repairing services.

2. If a wiring unit is supplied as a repairing part, do not repair or connect the wire even if there is only a partial wire break; exchange the whole wiring unit.

3. Do not wrench the fasten terminal; pull it out or insert it straightly.

4. Installation and servicing should be performed by a dealer or specialist. Defective installation by a user may cause water leakage, electrical shock, or fire.

5. Use specified parts and attached accessories for installation and servicing to prevent the set from falling, water leakage, fire, or electrical shock.

6. Install at a strong and firm location capable of withstanding the set’s weight.

7. Use an independent circuit and single outlet. If electrical circuit capacity is insufficient, it may cause electrical shock or fire.

8. This equipment is strongly recommended to be installed with an Earth Leakage Circuit Breaker (ELCB) or Residual Current Device (RCD).

9. This equipment must be properly earthed. Do not connect the earth line to a gas pipe, water pipe, earth of a lightning rod, or telephone line.

10. Do not use unspecified cords, modified cords, joint cords, or extension cords for the power supply cord.

11. During installation, ensure the refrigerant piping is properly installed before running the compressor.

12. During pump down operations, stop the compressor before removing the refrigerant piping.

13. Do not insert fingers or other objects into the unit as the high-speed rotating fan may cause injury.

The operational specifications for the PANASONIC CU-3E18JBE outdoor unit are as follows:

When selecting a location for the PANASONIC CU-3E18JBE, consider the following:

1. If an awning is built over the unit, ensure it does not obstruct heat radiation from the condenser.

2. Ensure no animals or plants are in the path of the hot air discharged from the unit.

3. Maintain the specified clearances from walls, ceilings, fences, or other obstacles as indicated by arrows in the installation diagrams.

4. Avoid places where flammable gas leakage may occur.

5. Ensure the location is strong enough to withstand the weight of the unit and is firm to prevent vibration and noise.

6. Select a location that allows for easy access during maintenance.

7. If the installation is on a roof, consider potential strong winds and earthquakes, and fasten the installation stand firmly with bolts or nails.

Connecting the piping for the PANASONIC CU-3E18JBE involves cutting, deburring, and flaring the copper pipes before tightening with a torque wrench. Use the following torque specifications:

Ensure that you do not over-tighten, as it may cause gas leakage. The liquid side piping size is 6.35 mm t0.8 and the gas side is 9.52 mm t0.8 for the PANASONIC CU-3E18JBE.

To evacuate the air inside the indoor unit and pipes of the PANASONIC CU-3E18JBE, follow these steps:

Step 1. Connect a charging hose with a push pin to the Low side of the charging set and the service port of the gas side 3-way valve.

Step 2. Connect the center hose of the charging set to a vacuum pump.

Step 3. Turn on the power switch of the vacuum pump and verify that the gauge needle moves from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa). Evacuate the air for approximately ten minutes.

Step 4. Close the Low side valve of the charging set and turn off the vacuum pump. Wait five minutes to ensure the gauge needle does not move.

Step 5. Disconnect the charging hose from the vacuum pump and the service port.

Step 6. Tighten the service port caps of the gas side 3-way valve at a torque of 18 N.m.

Step 7. Remove the valve caps of both the gas and liquid side 3-way valves and set them to the “OPEN” position using a 4 mm hexagonal wrench.

Step 8. Re-mount the valve caps and check for gas leakages.

The PANASONIC CU-3E18JBE requires specific cable types for safe operation:

1. Power Supply Cord: Use an approved polychloroprene sheathed cable, 3 x 2.5 mm2, type designation 245 IEC 57 or heavier.

2. Connecting Cable (Indoor to Outdoor): Use an approved polychloroprene sheathed 4 x 1.5 mm2 flexible cord, type designation 245 IEC 57 or heavier.

3. Earth Wire: The earth wire must be Yellow/Green (Y/G) in color and longer than the other AC wires for safety reasons.

4. Isolating Devices: These should have a minimum 3.0 mm contact gap.

Simultaneous operation of the PANASONIC CU-3E18JBE follows these rules:

1. Cooling and Heating operations cannot be performed simultaneously. If a cooling operation is in progress, a heating operation cannot be started in another room, and vice versa.

2. If a second room attempts to start a conflicting mode, the operation lamp of that indoor unit will blink, its fan will stop, and no air will be discharged.

3. Cooling operations can be performed simultaneously with other Cooling, Soft Dry, or e-ion operations.

4. Heating operations can only be performed simultaneously with other Heating operations.

5. Priority is designated to the indoor unit that starts operation first. If that unit stops, priority is transferred to other units.

To perform a pump down operation on the PANASONIC CU-3E18JBE:

1. Confirm that both the liquid side and gas side valves are open.

2. Press the PUMP DOWN button (SW1) on the Service PCB inside the outdoor unit for more than 5 seconds. The operation will run for 15 minutes.

3. Set the liquid side 3-way valve to the closed position and wait until the pressure gauge indicates 0.01 MPa (0.1 kg/cm2G).

4. Immediately set the gas side valve to the closed position and press the PUMP DOWN button (SW1) again to stop the operation.

You can perform a test run using the TEST OPERATION button (SW2) on the Service PCB of the PANASONIC CU-3E18JBE:

1. For a Cooling test: Press SW2 for 5 to 10 seconds. LED1 and LED2 will illuminate when the unit shifts into cooling test operation.

2. For a Heating test: Press SW2 for more than 10 seconds. LED1 and LED3 will illuminate when the unit shifts into heating test operation.

3. To cancel: Press the SW2 button again to stop the test operation.

The PANASONIC CU-3E18JBE uses codes to identify specific problems during troubleshooting: