Spicer TPCS Troubleshooting Guide - Manual (Page 12)

9
Operator Instructions
System Operation
• Display - The OCP uses a graphic display to indicate
the selection for both terrain mode and vehicle load.
Above the selector keys labeled HWY (highway), OFF
HWY (off-highway), and EMER (emergency), an illu-
minated arrow designates the current selection.
• Terrain Selection - The terrain selection is changed
by depressing the desired mode on the keypad.
When the system is actively changing tire pressure,
the arrow above the target mode will flash. Pressing
the key for a current mode will command a pressure
check.
• Load Selection - Vehicle load selection is
represented by an arrow above the rear wheels in the
graphic display. Depress the keypad
button labeled L/U to change from loaded to
unloaded.
Operating a loaded vehicle at unloaded tire pressures may
result in tire overheating and reduced tire life or blowout.
• Pressure Display - If the keypad button labeled
Select is pressed after vehicle start, numerical pres-
sures will be displayed sequentially for each active
channel. Subsequent actuation of the Select key will
lock the display on individual channels, or turn it off
again.
Note: The system is designed to allow tire pressure increase
due to heat buildup during vehicle use. This system will
not automatically deflate these pressure buildups—
lower pressure mode selection by the operator must be
selected to initiate a deflate.
• Channel Indicators - The OCP display includes rings
inside the tires of the truck graphic. The pressure
shown in the display reflects the channel with the
lighted rings.
• Service Code Indication - The OCP will display ser-
vice codes using a number and letter combination
followed by an exclamation point (!).
Note: See the Service Codes Section to diagnose and repair.
• Metric/English Indicator - The OCP may be pro-
grammed to display pressure in metric (BAR) or
English (PSI) units (see Programming section).
• RUN FLAT Indicator - If the TPC System determines
that a tire or tires may not be holding air, it may
reduce the pressure check interval to minimize the
possibility of air loss from the tire by switching to
RUN FLAT operation. (See RUN FLAT in the Key Fea-
tures section).
If RUN FLAT is activated, an asterisk (*) will be illu-
minated in the display of the OCP. This asterisk
matches the symbol on the RUN FLAT key and it
indicates that the RUN FLAT feature is selected. The
OCP also allows the driver to select RUN FLAT, by
depressing that key, to manually reduce the pressure
check interval. This may be desirable when operating
under conditions (i.e. sharp rocks or construction
debris) where tire punctures may be anticipated. The
RUN FLAT feature will automatically de-select after
10 minutes, but may be re-selected.
L / U HWY OFF HWY EMER RUN FLAT
SELECT
mph
kph
bar psi
CAUTION
mph
kph
bar psi bar psi
Tire Pressure Control
mph
kph
bar psi
Tire Pressure Control
mph
kph
bar psi
RUN FLAT L / U HWY OFF HWY EMER
SELECT