Operating Mode - Procom ECON-A Operating Instructions Manual

The remaining 6 digital outputs are fixed:
1) Charging Alt( Battery Voltage)
2) Crank Contact
3) Solenoid Contact
4) Hotter Contact
5) Mains Contactor Contact
6) Generator Contactor Contact
10.0

Operating Mode

AMF Version of ECON (ECON-A) has three programmable operating modes, i.e. Auto/ Semi Auto / Manual
mode.
Manual version of ECON(ECON-M) does not have auto and semi auto mode.
Auto/ Manual Mode can be toggled by pressing MODE switch from the front panel. Semi Auto mode can be
activated by pulling the semi Auto pin low, while the unit was in Auto Mode. This is explained latter. .
10.1 Auto Mode
ECON-A monitors the Mains supply, if Mains supply varies beyond set limit of under/over voltage or
under/over frequency or voltage unbalance for more than their individual programmed supervision time,
ECON-A releases the MCB contactor (to protect the contactor from failure because of low input voltage)
and attempts to starts the generator after the programmed delay start duration has expired. In case the
mains become healthy during this waiting period the MCB contact is switched on and the crank cycle is
aborted.
In case the heater time is set Heater contact along with Fuel Pump contact is switched on else only the
Fuel Pump contact is switched on.
After 1 second the ECON-A gives cranks the engine by activating the inbuilt, potential free, crank
contact. Crank command is withdrawn if the engine start is detected, either by LLOP pressure or by
build-up of generator voltage, as per the setting done by the user. Max duration of crank command is
user settable.
In case of non-start of the engine ECON-A re-cranks it till it starts or user programmed crank
attempts are exhausted. If generator fails to start after the maximum programmed crank attempts, Fail
to Start LED starts blinking, indicating start failure and the hooter is switched on.
After successful start of the generator, it is allowed to warm up for a user programmed time before the
load is transferred to generator.
While the generator is running ECON-A monitors it for external fault (Digital Inputs: Emergency, V-
Belt, RWL, user fault 1 and 2) and internal faults (Measured Values faults: LLOP, HWT, Fuel, Over
Load, voltage and frequency).
On persistence of any fault for more than the programmed supervision delay, for that fault, generator
is stopped, corresponding fault is announced & hooter is switched on.
On restoration of healthy mains supply, continuously, for the programmed duration the load is
transferred to the mains and generator is stopped after expiry of re-cooling time. In case mains again
become unhealthy during the re-cooling period the load is switched to generator.
After successful stopping of the generator either normally or on fault the Fuel Pump Contact is
removed. In case of fail to stop, the Fuel Pump Contact is not removed to avoid air locking.
10.2 Manual Mode
ECON-A, in this mode is under the manual control of the operator for starting and stopping of the
generator. Engine has to be started manually by manually pressing "Start" switch. The "Start" switch
shall not operate if GCB contact is closed, to provide protection to generator. Once the generator is
started the load can be switched to generator by pressing "GCB" switch or to mains by pressing MCB
switch. At any given time, either of GCB or MCB can be operational. Attempt to switch on GCB
while MCB is on will be ignored and vice versa. Both MCB and GCB key have dual function of
either switching ON or OFF the respective contactor. A press shall toggle the state. Continuously
pressing these keys shall keep toggling the status. To stop the generator, switch off the GCB contactor
and press "STOP" key. Any attempt to stop the generator, while the GCB contact is engaged, shall
be ignored.
While the generator is running ECON-A protects the generator by monitoring all internal and external
faults.
10.3 Semi Auto Mode
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