Patent ID: 8315115

Claim:
A pump assembly comprising: a frequency converter having control and regulation electronics, the control and regulation electronics comprising: a primary memory having (i) at least one matrix of memory cells, (ii) means for addressing the at least one memory cell matrix, and (iii) a write/read circuit, and a controller, wherein the controller is configured to automatically examine the primary memory by (a) examining at least a part of the means for addressing with regard to address errors, and (b) examining at least a part of the memory cells with regard to cell errors, wherein the examining steps (a) and (b) are performed independently of one another, and wherein step (a) comprises examining individual address bits of an n-bit wide address bus in steps that are performed independently of one another, depending on use of the primary memory for operation of the frequency converter; and a motor, wherein the frequency converter controls the motor through control and regulation electronics.