MEC 2 MICROPROCESSOR ENGINE/GENERATOR CONTROLLER
PM056 Rev 6 05/10/15
Thomson Technology
44
8.3.3. AUTOMATIC START/STOP SEQUENCE
When the controller is selected for automatic operation (via the front keypad
pushbutton), the engine will automatically start upon activation of the remote start
contact input.
Note:
The remote initiates a start sequence upon contact closure.
Once the remote start signal is activated, the engine will start as per the
sequence of operation described for the manual start sequence.
The automatic stop sequence will be initiated by removal of the remote start
signal. Once the start signal is removed, a cooldown delay function will be
initiated. Once the cooldown time delay period expires (typically programmed for
5 minutes), the controllers RUN output will be immediately terminated which will
initiate the engine to stop.
8.3.4. AUTOMATIC FAULT SHUTDOWN SEQUENCE
When a fault circuit is programmed as a SHUTDOWN, the engine will
immediately stop once the fault circuit is activated.
Note:
A specific shutdown
fault may be programmed with a definite time
transient
delay period that must
expire before the shutdown is activated. The stop sequence will cause the
controllers RUN output to be immediately terminated which will cause the engine
to stop.
8.3.5. AUTO MAINS FAILURE (AMF) SEQUENCE
When the controller is applied in an Auto Mains Failure (AMF) application with a
transfer switch, it must be wired as per FIGURE 21 shown at the end of this
section. Programmable output #3 must be selected for Utility Ready To Load
and programmable output #4 must be selected for Gen Ready To Load. Once
the controller is programmed and wired as per FIGURE 21, the AMF sequence of
operation will be as follows:
8.3.5.1.UTILITY NORMAL CONDITION:
•
Remote Start input signal (MEC terminals 16 & 17) is not activated
(i.e. Utility power is Normal).
•
Utility Ready To Load output is energized (i.e. signal to transfer switch
to transfer to utility power).
•
Generator Ready To Load output is de-energized.
