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30 <br />TROUBLESHOOTING - EVAPORATOR SYSTEM [TRAINED SERVICE PROVIDERS ONLY] <br />Low Suction Pressure Check that the Refrigerant doesn’t have a low charge. <br /> Check that Expansion Valve (TXV Valve) isn’t restricted. <br /> Check that Liquid Line or Filter isn’t restricted. <br /> Check that Evaporator Motors are working. <br /> Check that High Superheat doesn’t need adjusting. <br /> Check that the Thermostatic Element charge isn’t depleted. <br /> Check that there is air no seepage of air around Condensing Coil. <br /> Check that the Coil is not iced up. <br />High Suction Pressure Check that Refrigerant Charge isn’t too high. <br /> Check that Compressor Valves aren’t bad. <br /> Check that the Cooling Load isn’t high. <br /> Check that Superheat Adjustment isn’t low. <br /> Check TXV Bulb Installation <br /> a. Poor thermal contact. <br /> b. Warm location. <br /> Check Compressor: Low capacity means it is undersized for its application. <br />CONDITION TROUBLESHOOTING