Panasonic Horizontal Scroll Compressors C-SW

The following procedures should be followed to determine if the compressor is functioning properly:

1) Voltage of the unit should be measured and verified as correct.

2) An evaluation of the electrical system should be performed next. The motor should be checked by using continuity and short to ground testing. The internal motor protector should be given time to reset if a continuity break is found in the motor windings. External breakers and associated wiring should be checked.

3) Operation of indoor and outdoor fan/blower should be checked and verified as correct.

4) Check the refrigerant charge levels by connecting service gauges to the suction and liquid service valves and then turning on the compressor. Correlate the operating pressures to the system manufacturer specifications for the existing conditions under which the unit is operating.

5) On heat pump, check that the reversing valve is operating properly and verify that compressor current is within published compressor specifications at the proper operating conditions. If there is a significant deviation from current published specifications occurs (+/-15% or more) this may indicate a defective compressor.;

The enclosure strength test should be performed to check system leakage by means of charging pressurized nitrogen into the system. Pressurizing should be completed step by step instead of reaching the test pressure immediately.

1) Hold 0.5MPa pressure for 5 minutes to check whether the pressure is decreasing.

2) Hold 1.5MPa pressure for 5 minutes to check whether the pressure is decreasing.

3) Record the ambient temperature and pressure when the test pressure is attained (unit design pressure).

4) Ensure the system can hold the test pressure without decreasing for 24 hours. If pressure decreasing occurs in any step, leakage points should be checked and repaired immediately.;

The preferred method of remove a compressor is to cut the connecting lines using a tubing cutter. However, unbrazing is also acceptable using the following precautions. Check to be sure all refrigerant has been evacuated using the procedure above in 4.12.2. If there is still refrigerant in the system, this when combined with the compressor oil can ignite if it comes in contact with a flame.

(1) Use the suitable welding machine or tools to remove the connecting pipes, screws, flanges or service valves

(2) Check the oil in failed compressor. If oil is in black color (the normal color of oil for HFC models is colorless), if necessary to clean the system piping before installing new compressor.

Compressor Replacement for Motor Burn Out

If a motor burn out is present, follow the procedure as below:

1) Evacuate the system per section 4.12.2.

2) Remove the compressor as outlined in sections 4.12.3 and then follow proper clean-out procedures as detailed in system instructions.

3) Replace the liquid line filter dryer and install a properly sized suction line filter dryer.