Sterling 882.00249.00 manual Runs but no station loads

Label	Description
LOADING	Following the IDLE (Startup) state, the vent valve is closed and the first
	station in demand loads when that station sequence valve opens. This is the
	LOADING state. You can define load times for each station. The controller
	loads the station in demand until one of the two events below occur:
	1. The volume fill sensor becomes active.
	2. The load time is exhausted.
	At the end of the LOADING cycle, the controller closes the sequence valve
	and continues to the next station in the queue. If all stations are satisfied, the
	controller enters the IDLE (No Activity) state.
IDLE	The IDLE (No Activity) state acts as an energy saver and pump lifetime
(No Activity)	extender. During this state, the atmospheric valve is open, allowing the
	vacuum to be vented. All sequence valves are closed and all inputs are
	monitored for demand activity. This feature reduces repeated starting and
	stopping of pumps, extending pump operation life.
	If the controller senses a demand during the IDLE (No Activity) state, the
	controller re-enters the LOADING state by closing the vent valve and opening
	the sequence valve of the station in demand.
	If no demand exists in the system for the duration of the IDLE (No Activity)
	time setting, the controller then enters the READY state.
	Note: IDLE is any condition in the conveying system when the pump
	runs but no station loads.
READY	The READY state is a monitoring function. All outputs are off and the
	controller waits for a demand signal to be fulfilled. If the controller senses a
	demand condition, the controller then re-enters the STARTING state and
	returns to load material into the hoppers.
BLOWBACK	When enabled, the controller enters the BLOWBACK state following a user-
	definable number of station loads. The blowback function is to pulse air
	through the filter system to keep the filter from clogging. The number and
	duration of the air pulses is also user-definable; see the Blowback menu on
	Pages 54-58for more information.
LOADING/IDLE	In Dual Pump mode, if you start the controller with demand from stations
(2 Pump Mode	assigned to both pumps, both pumps start at the same time. In many plants,
Only)	such a resulting power surge can momentarily exceed the electrical limits of
	the plant. To prevent this condition, the pumps are staged in sequence
	separated by a short duration. Pump 1 always starts first, followed by Pump 2.
	This state also applies when both pumps are in the OFFLINE state and
	demand occurs on both systems at the same time.

2–Pump 12-Station Controllers Chapter 4: Operation 41