Unit is flat with 410a, perform leak search and repair if possible for circuit 1. (5lb 12oz 410a). Performed leak search and repair. Added 400psi of nitrogen to system and found leak at low pressure switch pipe. Used torch to heat up extension pipe then removed it entirely. Cleaned copper on both ends then used torch and brazen rods to seal pipe to suction line. Verified no leaks with 400psi of nitrogen. Removed nitrogen and vacuumed system down to 500micron and held. Added factory charge of 92 oz of 410a and tested unit. Normal pressures, temps, and amperages. Unit operating normal.