62-11850 18
GENERAL TROUBLESHOOTING
Use proper Lockout/Tagout procedures before inspect-
ing/servicing this unit. All unit inspection/servicing
must be performed by properly trained personnel only.
Everything possible has been done to ensure that this unit is the most
reliable, trouble-free equipment available today. If, however you run into
problems the following section may be of assistance.
If you do not find the trouble that you have experienced listed, please call
your Carrier Transicold dealer for assistance.
Cooling Mode
Unit will not cool Compressor drive belt broken.
Compressor defective.
Defrost cycle has not terminated.
Abnormal pressure.
Hot gas (two-way) solenoid malfunction.
Insufficient cooling No or restricted evaporator airflow.
Compressor valve(s) worn or broken.
Abnormal pressure.
Expansion valve malfunction.
Long or continuous
cooling
Box hot load.
Defective box insulation or air leak.
Abnormal pressure.
Temperature controller malfunction.
Compressor defective.
High discharge pressure Condenser coil dirty.
Non-condensibles or refrigerant
overcharge.
Condenser fan inoperative.
Low discharge pressure Compressor valve(s) worn or broken.
Hot gas (two-way) solenoid malfunction.
High suction pressure Compressor valve(s) worn or broken.
Hot gas (two-way) solenoid malfunction.
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