Fireboy Control Module Functions
Item Display Function Action Required
Engine OK LED (green) Illuminated
Engine sensor is detected, signal
is OK, and system power is on.
None required.
Engine Fault LED (yellow) Illuminated
Engine sensor is not detected, or
there is a signal malfunction.
Have the system checked
immediately.
Engine Danger LED (red) Illuminated
The engine sensor is reading an
amount of gas greater than 20%
LFL.
Suspend vehicle operation
immediately and follow alarm
procedures.
Reset/Silence —
Turns the relay off when in alarm
mode.
Press the buttom.
Power/Fault LED (green/
yellow)
Illuminated (green) System is on. None required.
Illuminated (yellow) Not used. Not used.
Buzzer Sounding
Gas is detected at a level above
50% LFL in the specified zone.
Suspend vehicle operation
immediately and follow alarm
procedures.
Table 19.2, Control Module Functions
Testing
Daimler Truck North America strongly recommends
that all operators follow California Code of
Regulations (CCR) inspection requirements,
regardless of where the vehicle is operated. Per Title
13 CCR
§
935 (2), gas detection systems should be
tested three times per calendar year at equal
intervals. The testing procedure should simulate the
same operating environment in which the vehicle is
used, with the same gaseous fuel.
Test results validating the performance of the gas
detection system within the parameters established
by the component manufacturer and NFPA 52 2010
should be maintained as a permanent part of the
vehicle service records. Use of alcohol, propane, and
other harsh liquids or gases are not acceptable
methods for testing.
Always test the system and sensors after any
component has been replaced, or if the vehicle has
been involved in an accident or fire. Ensure that the
gas detection system is wired directly to the battery.
It is recommended that the highest level of safety
validation be utilized if there are multiple validation
requirements in the state or locality where the vehicle
is operated or domiciled.
Control Module Console Test
Press and hold the Push To Test button for one
minute. The system will proceed with a self-
diagnostic test that will include illumination of the
Trace and SIGNIFICANT gas concentration lights,
and the sensor fault lights. Verify the large red light
and buzzer activate, and that all lights illuminate or
flash to ensure that all bulbs are operational.
Sensor Test
The gas detection system sensors must be tested
regularly by a trained technician, using certified test
equipment that satisfies CCR
§
935 (2) or NFPA 52
regulations.
Major Repair and Replacement
of Natural Gas Components
If a natural-gas-fueled vehicle is involved in an
accident, remove the fuel tank or cylinders from
service and have them inspected by a qualified
technician. Replace any leaking or damaged fuel
tanks/cylinders and fuel lines; repair or replace
leaking or damaged fittings. Install parts and
components in accordance with the manufacturer’s
instructions.
Natural Gas Vehicle Information
19.9
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