Major Repair And Replacement Of Natural Gas Components - freightliner M2 Plus 2023 Manual

Natural Gas Vehicle Information
Item
Engine OK LED (green)
Engine Fault LED (yellow)
Engine Danger LED (red)
Reset/Silence
Power/Fault LED (green/
yellow)
Buzzer
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
19.9
Fireboy Control Module Functions
Display
Engine sensor is detected, signal
Illuminated
is OK, and system power is on.
Engine sensor is not detected, or
Illuminated
there is a signal malfunction.
The engine sensor is reading an
Illuminated amount of gas greater than 20%
LFL.
Turns the relay off when in alarm
—
mode.
Illuminated (green) System is on.
Illuminated (yellow) Not used.
Gas is detected at a level above
Sounding
50% LFL in the specified zone.
Table 19.2, Control Module Functions
Function
None required.
Have the system checked
immediately.
Suspend vehicle operation
immediately and follow alarm
procedures.
Press the buttom.
None required.
Not used.
Suspend vehicle operation
immediately and follow alarm
procedures.
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
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.
Action Required
§
935 (2) or NFPA 52