Part | Function | Function statuses (definition) |
P1 | TF1 to give head | 1―Active (pump drains current) 0―Inactive (no current) |
P2 | TF2 to give backup head | 1―Active (pump drains current) 0―Inactive (no current) |
V1 | TF3 to isolate inlet | 1―Active (valve closed switch pressed) 0―Inactive (valve open switch pressed) |
V2 | TF4 to isolate outlet | 1―Active (valve closed switch pressed) 0―Inactive (valve open switch pressed) |
C1 | TF5 to cut P1 supply | 1―Active (circuit breaker is open) 0―Inactive (circuit breaker closed) |
C2 | TF6 to cut P2 supply | 1―Active (circuit breaker is open) 0―Inactive (circuit breaker closed) |