Himoinsa M1 - Page 15

OPERATING MODES | PAGE 15
4.2.3 AUTOMATIC MODE (AUT)
In this operating mode, the start-up is subordinate to the closure of the free
voltage contact (LT). When it closes, the controller sequentially commands a
congured number of retries, as long as it does not detect that the engine is
running. The number of retries, start-up time and time between retries is
congurable (see section 3.2).
When the free voltage contact opens, the controller orders a stop and waits for it
to close again or for a change of operating mode.
NOTE
If the controller is disconnected, reset or suffers a power failure, once restored, if
it is set to AUTO mode with the LT contact closed, the generator set will start.
4.3 ACTIVATING AND PROGRAMMING OVERSPEED (SV)
To set the frequency value at which the overspeed protection device should
activate, you have to start up the generator set and wait for it to be stabilise. Once
the genset is running at its rated frequency, press the reset button for more than 5
seconds. After this the overspeed LED that was blinking will turn off, given that no
value has been congured. Overspeed detection will be enabled from now on. To
disable this protection, press the reset button for more than 5 seconds with the
engine stopped completely. The programmed speed will not be deleted but the
shutdown of the genset due to overspeed will be disabled. The process described
is valid both for the detection of frequency by generator and by Pick-Up.
NOTE
To change the operating frequency that has been programmed, it is preferable to
disable the overspeed with the engine stopped, and to then start a new cycle of
speed storage to stop the speed that was programmed beforehand from
shutting down the engine or interfering in the process.
NOTE
You can use the conguration software to disable the overspeed protection. It
can also be activated by returning to the last frequency that was stored. If no
valid value has been previously programmed, the genset will not perform as
expected.
4.2 OPERATING MODES
Turn the control unit on by turning its key toward one of the "MAN" or "AUTO”
positions. The rst action that the Control Unit performs is an internal diagnostic
and a check of the lamps by turning on all the LEDs on the front panel. Then it
enters standby mode, as long as the "LT” input is not activated and you have
selected "AUTO" mode which would start the group up.
The M1 control unit can operate in three different modes, all of which can be
selected using the lock on the front panel. You select STOP mode by turning the
key to the central "STOP" position. You select MANUAL mode by turning the key
to the left and placing it in the "MAN” position. By turning it clockwise and placing
it in the "AUTO" position, you select the AUTOMATIC operation mode.
4.2.1 STOP MODE (STOP)
Selecting this mode of operation, the control unit orders the generator set to
shut down in a controlled manner, if it is running. After checking that it has shut
down, it turns itself off.
4.2.2 MANUAL MODE (MAN)
When you select the MANUAL mode, the control unit will be controlled via the
Start button. Pressing the Start button orders the genset to start up immediately;
a preheating cycle is performed for a period of time in accordance with the set
values (see section 3.2) and the positions of the microswitches (see section
3.3).
Pressing the Start button when the genset is running will launch a controlled
shutdown, allowing a cooling time if this has been congured (see sections 3.2
and 3.3) and if the genset’s breaker has been activated before the shutdown. To
cancel the cooling time just press the Start button again while the cooling is
being performed.
The engine's protection devices are active at all times. The load connection
(closing of the genset contactor), is performed automatically after the time set for
the stabilisation of the genset (see section 3.2). From that moment, the contactor
is permanently locked until the genset has been stopped or an alarm with an
associated stop is detected.