The Hvac Subcooling Charging Method Explained Subcooling = 100°f – 92°f = 8°f. the calculation itself is the easy part. the harder part is how to measure the needed refrigerant temperatures for superheat and subcooling calculation. we use an hvac manifold gauge and a clamp on thermometer for all superheat and subcooling measurements. 2 fuses to power the three relay control coils 2 25a fuses to power the two fans 3 relays: main fan relay 1, main fan relay 2, and sub fan relay. subaru radiator fan wiring diagram with engine running but no cooling needed. power to the control coil of main fan relay 1 is provided by fuse 26.
Hvac Subcooling Charging Method Explained Nspectionoperating condition:radiator fan operates depending on the radiator fan speed related to engine coolant temperature or the ra diator fan speed related to a c compressor load, whichever. is higher as a load condition. radiator fan speed relate. kgf cm2, 725 psi)diagnosis:radiator main and sub fans do not rot. 1) connect the test mode connector. 2) turn the ignition switch to on. 3) using subaru select monitor, check the compulsory operation of radiator fan. n o te: with subaru select monitor when checking the compulsory operation of radiator fan, the radiator main and sub fan repeat the rotation in order of following: low speed rotation o high speed. Take the condensing temperature and the condenser outlet temperature, and the difference between the two is the amount of subcooling. “let’s say the condensing temperature is 100°f. put a thermistor on the condenser outlet, and let’s say that’s 90°,” continued tomczyk. “so, you have 10° of subcooling. technicians get confused. Radiator sub fan.
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