07.06 What are common day tank problems?

The most common day tank problems are in re-filling: either high level or low level problems.

High level problems can be caused by: (a) leaking inlet solenoid valves, (b) inlet solenoid valve failed open, (c) inlet solenoid bypass valve is open, (d) failure of the fill stop level sensor, (e) loose wiring to the controller for fill stop level sensor.

Low level problems can be caused by: (a) failed solenoid valve, (b) closed manual valve in the day tank inlet piping, (c) failure of the fill start level sensor, (d) loose wiring to the controller for the fill start level sensor, (e) loss of signal from the controller to the pump start, (f) problem with duplex pump electrical motor starter, (g) closed valve in fuel supply piping, (h) loss of prime in pump suction piping, (i) low fuel level in bulk storage tank.