TROUBLESHOOTING (BY TRAINED SERVICE PROVIDERS ONLY) - EVAPORATOR SYSTEM
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CONDITION
TROUBLESHOOTING
Low Suction Pressure
Check that the Refrigerant doesn’t have a low charge.
Check that Expansion Valve (TXV Valve) isn’t restricted.
Check that Liquid Line or Filter isn’t restricted.
Check that Evaporator Motors are working.
Check that High Superheat doesn’t need adjusting.
Check that the Thermostatic Element charge isn’t depleted.
Check that there is air no seepage of air around Condensing Coil.
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 bad.
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.
