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Service Manual – SW5500, FLOORTEC R 985
29 - Engine, Hybrid System
Functional Description
The “Hybrid System Kit” is applicable both to the
LPG or Diesel engine versions with the aim of
allowing the user to work even with switched off
engine, getting energy from the batteries
Compared to the standard system, the Kit
application requires the following electrical system
changes:
1 Replacement of the standard batteries with
special batteries for cyclic uses This permits
the batteries usage with partial discharge and
recharge cycles obtained by simply turning ON
or OFF the engine according to the operator’s
needs, regardless what is the batteries charging
status, without drastically compromising the
useful life of the batteries
2 Addition of an on-board battery charger for
the periodic recharging of the batteries with a
suitable cycle at full charging of the batteries
This has fundamental importance for the
batteries useful life, since the charging by means
of the alternator does not allow the batteries to
regenerate their selves in a correct and complete
way, differently from the charging cycle
executed with the proper charger The charging
cycle with on-board battery charger is therefore
necessary at least periodically (see point 6 c)
3 Addition of the relay (S11) with the dual
function of:
−
Inhibition of the machine functions while
charging the batteries with on-board
battery charger (open the key circuit to
the battery charger connected network)
−
Signal to the Main Machine Controller
(EB1) of the batteries recharging with
on-board battery charger (high logic
input with battery charger connected to
the network)
4 Addition of the engine shut off switch (SW2)
which allows the engine to be turned off while
continuing the work on battery mode only,
without being forced to completely stop machine
by means of the main key switch The shut off
switch (SW2), with normally closed contact, for
switching off the engine on the GPL version it
opens the key input of the engine speed control
unit (EB7), while on the diesel version it cuts off
the supply of the fuel pump (P2)
5 Bypass of drive system enabling relay (ES8)
through a bridge wire installed between contacts
“Common” and “Normally Open” instead of relay
(ES8) ” This change allows the activation of the
Drive Wheel Controller (EB2) even with the
shut off engine
6 Set HYB parameter on “YES” This change
allows:
−
Both the display of the battery charging
status with a 3-segments icon on the
display (like on Battery version) and
functions inhibition, during battery
mode, when the battery voltage reaches
the security minimum level (as of
Battery version)
−
The ability to activate the work functions
(brooms, vacuum) even with engine shut
off
−
The counting, through a special hour
counter, of the specific working hours
in the “battery mode” ( i e with the
engine shut off) between a charging
cycle with onboard battery charger
and another one When the number
of hours since the last charging cycle
reaches the value set in parameter
HRC, the display, instead of the working
screen, shows the following warning
to alert the operator that a complete
batteries charging cycle is needed using
the proper on-board battery charger
The hour counter will be reset and the message
will disappear after the charger is connected to the
network for a period longer than 1 hour
