EAAM057608EN
GC250 Technical Manual 133
(AUTO): the controller starts/stops the pump depending on the level
of the fuel in the tank on board the machine, with a hysteresis band that prevents
continuous starts/arrests.
(MAN-ON): the pump is stopped only when the tank is full. No hysteresis band
is managed: as soon as the tank is no longer full, the pump starts.
(MAN-OFF): the pump is always off, even with the tank empty.
Through the parameter P.0406 you can select which of the following is the pump's power
supply:
0
– Generator
2
– Loads
3 - Mains
4 - Always powered (power supply is always present).
The controller keeps the pump off if the selected source is not available (maintaining the
selected operation mode though). With the controller in
OFF_RESET
the pump is always
stopped. The status of the pump is identified by the following symbols:
: pump on.
: pump off.
The controller is able to operate both with a system for level detection on contacts, and with
an analogue tool.
In order for this feature to be usable, the DOF.1032 code
– “Fuel pump” must be set in one of
the configurable outputs.
Another possibility is to configure a digital output to command and interception solenoid on the
pump line (DOF.1034
– “Fuel pump solenoid command”).
In BoardPrg3 we have the menu 4.2.1 for pump configuring. Anyway, you can set each
individual parameter directly from the controller.
Parameter P.0405 configures the delay between the activation of the solenoid command
(digital output configured as DOF.1034
– “Fuel pump solenoid command”) and the pump start
command (digital output configured as DOF.1032
– Fuel pump command”).
11.1.1
Use with an analogue level transducer To use this function:
To use this function requires:
It is recommended to have an analogue transducer configured on an analogue input.
Configure the controller to control the pump in accordance with said transducer
(parameter P.0401=0).
Set at least the thresholds to activate/deactivate the pump (parameters P.0402 and
P.0403).
If set, also minimum, low and high fuel levels are used (parameters P.0347, P.0345,
P.0343).
WARNING
: if the first two conditions are met, the controller will control the pump no
matter what the threshold values are. In particular, the last condition set thresholds are used
even though related operation times are set to zero (for disabling anomalies). Very important
is the thresholds setting which should be ranked by level (from down up), as follows: minimum,
low, start, stop, high. As already explained, the controller operates even if thresholds are not
