TPC TIREBOSS - Warnings

SERVICE MANUAL
TIREBOSS
TM
Tire Pressure Control
3-1
f:tec\manuals\Service\SERVICEv5.indd - V6-0615
TIREBOSS
™
WARNINGS
TIRE PRESSURE
LOSS
-STOP VEHICLE
NOW-
..a continuous pressure drop in one
or more axle groups, even though
system is trying to infl ate
- identify air loss problem.... search for broken
air line, broken fi tting, etc. Repair as required.
- check for small leak on static tank and at
transducer
LOW AIR
SUPPLY
.. air brake tank pressure is lower
than safety pressure switch setting.
Switch is sensing wet tank pressure,
so a drop may not be indicated on
truck brake pressure gauges.
- adjust pressure protection valve to 100 PSI as
per page 2-3 of this manual
- check pressure switch wiring for breaks or
poor connections. Continuous warning indi-
cates an open circuit. The switch is normally
open and closes on pressure rise. Normally
open conditions activates “Low Air Supply”. A
cycling of warnings “off and on” indicates im-
properly adjusted pressure protection valve.
- replace pressure switch (mounted inside valve
box or on side of pressure protection valve)
The system has seven ‘warning conditions’. The following chart indicates the cause of
the warnings and some possible solutions. If the problem persists, contact TPC International or
one of their authorized installers, and speak to a service technician.
AIR FLOW
RESTRICTION
..the system is cycling from infl ate
to OK to defl ate several times indi-
cating a line restriction or a closed
valve.
.. trailer not connected to system
or not equipped with tire pressure
control
- check that all valves are open
- check for air line kinks or restrictions
- do air fl ow checks from each tire back to
Y-strainers at valve box
-de-activate trailer circuit as per operator guide
!! LOADED
VEHICLE !!
..air bag pressure is high indicating
a loaded vehicle
- change to loaded setting
- adjust switch to match loads
TRAILER
CIRCUIT
DISABLED
..indicates that trailer control has
been deactivated (for operating
truck only with no trailer or trailer
system is disconnected)
- reactivate trailer control by pushing and hold-
ing stop for 2 seconds
WARNING
CAUSE POSSIBLE SOLUTIONS
TIRE
OVER-PRESSURE
..the system senses tire pressure
20 psi above set point and continues
to rise
- check for external heat sources... i.e. dragging
brakes, bearing failure causing hub and wheel
to build heat and increase tire pressure
- increase set point pressure to match load or
application
- reduce vehicle load
OVERSPEED
CONDITION
..vehicle exceeding programmed
speed settings
..OCU calibration is incorrect
..speed/ignition wires installed
incorrectly
- slow vehicle to below max.speed for that set-
ting
- change to next higher setting
-recalibrate OCU