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19. Troubleshooting Evaporator System
Troubleshooting Condensing System (Quali• ed Service Technicians Only)
Condition Troubleshooting
Low Suction Pressure Check for low refrigerant
Check that Expansion valve isn't restricted
Check that Liquid Line or Filter isn't restricted.
Check that Evaporator Motors are working.
Check for Superheat setting.
Check that the Thermostatic Element charge isn't depleted.
Check that the Coil is not iced up.
High Suction Pressure Check that Refrigerant Charge isn't too high
Check that Compressor Valves aren't faulty.
Check that there is no air seepage around Condensing Coil.
Check that the Cooling Load isn't high.
Check that Superheat adjustment isn't low.
Check TXV Bulb Installation
a. Poor thermal contact.
b. Warm location
Check Compressor: Low capacity means it is undersized for its application.
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