User Manual

SECTION 2 - PROCEDURES
3120884 – JLG Lift – 2-75
• Overspeed
If the engine speed exceeds the overspeed limit, the
engine will stop immediately and an overspeed alarm will
be indi cated.
• Underspeed
Enabled once TDBP (time delay bypass) period has
elapsed aft er engine st artup. If the engine spee d drops
below the u ndersp eed li mit, the en gine wi ll sto p imme di-
ately and an engine underspeed alarm will be indicated.
• Overcrank
If the engine fails to start after a set number of start
attempts, the RB S will cease atte mpts to rest art and an
engine overcrank alarm will be indicated.
• No Speed Signal
In the event of a loss of speed signal, the RBS will shut-
down and an engine no speed signal alarm will be indi-
cated. This shutdown is delayed by a factory set period to
ensure the fault was not momentary.
• Overvoltage
If the voltage measured at the alternator output exceeds
the high voltage setting, the RBS will stop immediately
and an RBS high output alarm will be indicated. This shut-
down is delayed by a factory set period to ensure the fault
was not caused by a transient condition. This feature pro-
tects the batteries and load from high DC voltages.
• Engine Starting System F a ult
Indicates a problem with either the engine start battery,
engine magneto, or magneto voltage regulator.
• Loss Of V oltage Sense
If the voltage measured at the alternator output is les s
than half of the system nominal voltage, the RBS will stop
immediatel y and an R BS loss of voltage sense alar m will
be indicated. Th is feature prot ects the bat teries and load
from high DC voltages due to a loss of output control.
• Run Inhibited
The RBS unit is disabled by the ru n inhibited input.
Output Curren t and Voltage Settings
• Normal/Extended Output Voltage
The normal/extended output voltage setting is the voltage
at which the alternator changes under normal operating
cond itio ns.
• Current Limit
The current limit setting determines the maximum alterna-
tor output current.
• High Voltage Shutdown Level
This setting determines the alternator output voltage at
which the hig h voltage s hutdo wn occ urs. This protects the
load from abnormally high voltages.
• Finish Charging Current
The finish char gin g current determines the level of the cur-
rent alternator output must drop below for a low battery
voltag e CTS to be remove d. This ensures that the b atter-
ies have accepted sufficient charge prior to shutting down
the RBS. This level is used along with the low b attery vo lt-
age remove CTS level to determine when the RBS
removes the CTS after a low battery voltage CTS. If the
chargi ng curre nt falls b elow th e finis h chargin g curren t
while another CT S is active, th e RBS will continue to op er-
ate a t the n ormal /exten ded output v oltag e un til al l CTS’ s
are removed.