Trane CGAD020 - Page 83

CGAD-SVN02C-EN 83
Symptoms Possible Cause Procedure
1. Little changes in the high and low
pressures.
1. The compressor is turning
counterclockwise.
1. Change two phases.
2. Suction pressure is extremely low. 2. Check restrictions and lack of
refrigerant.
2. Eliminate leaks and complete
charge. Eliminate restrictions.
3. Compressor does not pump and
the suction and discharge pressures
are low. The compressor is phased
correctly.
3. Compressor is damaged. 3. Check the condition of the oil and
change compressor.
Symptoms Possible Cause Procedure
1. Compressor vibrates and makes
noise.
1. The compressor is turning
counterclockwise.
1. Change two phases.
2. Suction pressure is low. 2. Lack of gas and motor overheats. 2. Eliminate leaks and charge gas.
3. Suction pressure is low. 3. Compressor starts repeatedly,
opening the motor's internal
thermostat.
3. Same as above.
Symptoms Possible Cause Procedure
1. Low amperage. The high and low
pressures change very little. Rattling
noises. Compressor vibrates too
much.
1. The compressor is turning
counterclockwise.
1. Change two phases.
M. SCROLL COMPRESSOR IS USING TOO LITTLE ENERGY
N. THERMOSTAT COIL OPENS SCROLL COMPRESSOR
O. SCROLL COMPRESSOR WITH INCORRECT ELECTRICAL PHASING
Troubleshooting
Note: These troubleshooting procedures apply to the CGAD Standard units. Troubleshooting with optional components should be checked
with the Technical Assistance Department at Trane do Brasil.