CGAD-SVN02C-EN78
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 Possible Cause Procedure
1. The voltmeter does not show a
1. No electrical energy. 1. Check the power source.
2. The voltmeter does not show a
supply of energy to the contactors.
2. The disconnect is turned off. 2. Turn on the disconnect.
3. The voltmeter shows a voltage
before the fuses, but not after them.
3. Burnt fuse. 3. Change the fuses. Check the
motor's load.
4. The voltmeter shows a low 4. Low voltage. 4. Contact the Power Company.
5. Power is reaching the motor
terminals, but it does not start.
5. Motor is burnt. 5. Replace the motor.
6. Check the commands to see if the
coil of the contactor is not burnt.
6. Starter contactor does not close. 6. Fix it or change it.
7. The contactor does not receive
power.
7. The contact of the overload relay
is open.
7. Reset the overload relay.
Symptoms Possible Cause Procedure
1. An electrical circuit test shows
that there is no power on the side of
the line with the motor's starting
1. No power. 1. Check the power source.
2. An electrical circuit test shows
that there is no power on the side of
the line with the motor's starting
2. Disconnect is open. 2. Determine why the switch was
open. If the system is in operational
conditions, turn on the switch.
3. An electrical circuit test shows
that there is power on the side of
the line but not on the fuse load
3. Burnt fuse. 3. Replace the fuse. Check the
motor's load.
4. The voltmeter shows a low
voltage.
4. Low voltage. 4. Use a voltmeter to check and call
the Power Company.
5. Power is reaching the motor
terminals, but it does not start.
5. Motor is burnt. 5. Fix it or replace it.
6. Test to see if there are no burnt
6. The starter switch is broken. 6. Fix it or replace it.
7. The coil of the motor's starting
switch does not receive energy.
7. Control circuit is open. 7. Locate which control turned off
and why.
7.1. High-pressure switch
7.2. Low-pressure switch
7.3. Pressure limit switch
7.4. Motor protector
7.5. Interlocking circuit is open.
7.6. Turned off by the ambient
8. The compressor does not work. 8. The compressor is jammed or
damaged.
8. Fix or replace the compressor.
A . CONDENSER FAN DOES NOT START
B. COMPRESSOR DOES NOT START
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