Code B446, B447 & B448 Refrigerant System Problem (2 Of 2): Notes

Fig 1: Code B446, B447 & B448 Wiring Diagram (Reatta & Riviera) Refrigerant System Problem (2 Of 2)

Fig 2: Code B446, B447 & B448 Wiring Diagram (Toronado) Refrigerant System Problem (2 Of 2)

It has been determined from previous chart that problem is not in low refrigerant pressure switch circuit.

1. This is a test to determine if A/C low refrigerant pressure switch opens while compressor is running. If BI08 display remains high during compressor engagement, then system fault is due to refrigerant.
2. This checks if switch is opening due to low refrigerant pressure charge or switch.