CGAD-SVN02C-EN80
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.
Symptoms P ossibl e C ause Proc edure
1. Oil level is too low. 1. Insufficient charge of oil. 1. Add a quantity of oil to the
compressor that is sufficient for it.
2. Oil level falls gradually. 2. The filter dryer is plugged. 2. Replace the dryer filter.
3. Suction is too cold. 3. Bulb of the expansion valve is
loose (poor thermal contact).
3. Make sure that there is a good
contact between the remote bulb
and the suction line.
4. Same and the compressor is
making a lot of noise.
4. Flood back into the compressor. 4. Readjust the superheat,
subcooling, or check the contact of
the remote bulb on the expansion
5. The starts and stops are too
frequent.
5. The compressor turns on and off
too frequently.
5. See the problems listed in
problem B.
Symptoms P ossibl e C ause Proc edure
1. Rattling noise. 1. Lack of oil. 1. Add oil.
2. Loud noise. 2. Internal parts of the compressor
are broken.
2. Change the compressor.
3. Suction line is too cold. 3. Flood back into the compressor. 3. Check and adjust the superheat.
The valve may be too large or the
remote bulb may be loose on the
4. The suction line is extremely cold.
The compressor pings.
4. Expansion valve is stuck in the
open position.
4. Fix it or replace it.
E. C OMP RESSOR OIL LEV EL IS TOO LOW
F. C OMPRESSOR IS MAK ING TOO MUC H NOISE
Symptoms P ossibl e C ause Proc edure
1. Expansion valve squeaks. 1. Bubbles in the liquid line. 1. Add refrigerant.
2. Change of temperature in the
refrigerant line through the dryer
filter or the key lock solenoid valve.
2. The filter dryer or the key lock
solenoid valve is plugged.
2. Clean or replace.
3. Short cycle. 3. Expansion valve is stuck or
clogged.
3. Fix or replace the expansion valve.
4. Superheat is too high. 4. The pressure drop in the
evaporator is too much.
4. Check the superheat and readjust
the expansion valve.
5. Insufflation temperature is too
high or too low.
5. Superheat is inadequate. 5. Check the superheat. Adjust the
expansion valve.
6. The air flow is reduced. The
evaporating temperature is below
zero.
6. Air filters are clogged. 6. Clean or replace.
G. SY STEM SH OWS A POOR PERFORMANC E
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