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f:tec\manuals\Service\SERVICEv5.indd - V6-0615
SERVICE MANUAL
TIREBOSS
TM
Tire Pressure Control
MENU
ENTER
DOWN
UP
OCU “HEATER INFO” SCREEN
Note: All Operator Control Units manufactured after the Spring 2005 have a heater information
screen available. (Factory heater settings must be activated for this function to operate.)
To access this information/ test screen, use the following procedures....
1. Push
2. Push seven times until “HEATER INFO-PUSH ENTER TO ACCEPT” appears on screen
3. Push
The display screen should now read... Heater Info OFF
Voltage (V) 0.00
Power (W) 0.00
UP ON / DOWN OFF
To activate heaters push . This will temporarily turn the heaters on for the test procedure.
(Heaters will automatically return to normal function operation when Info Screen in exited.)
The display screen should now read... Heater Info ON
Voltage (V) 12.89 ...(example only for a 2 zone/40watt heater)
Power (W) 89.60 ...(example only for a 2 zone/40watt heater)
UP ON / DOWN OFF
If the screen does not show as example the following problems may exist...
If Voltage (V) shows a reading (ie. 12.89) and Power (W) reads 0.... the heater is not functioning
-check heater wires and connection or replace heater pad
If Voltage (V) reads 0 and Power (W) reads 0.... the 10 Amp fuse on the Valve Circuit board may be faulty
-replace push-in fuse on Valve Circuit Board (see Valve Circuit Board Schematic for location)
To determine if the heaters are within the acceptable working range you will need to know the number of ohms.
To determine the number of ohms, use the following formulas...
step one...
Power (W) ÷ Voltage(V) = Amps (A)
step two...
Voltage(V) ÷ Amps (A) = Ohms( )
step three...
Compare ohms reading to chart in the “HEATER CURRENT ERROR” Alert section in the service manual.
If the ohms are not within the acceptable ranges, inspect wires, power source, and connections. To test a single
heater, disconnect all but one heater and repeat above procedure for each. This will identify the faulty heater circuit
if it exists. Replace faulty heater if necessary.
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