How the System Works
Systems Normal
A steady green 'System Normal' LED indicates:
-
the system is powered on,
-
all components are operating normally,
-
gas levels, if detected, are equal to or below 50% the LEL.
It is good practice to verify the system LED is green before entering the vehicle. Though the panel is designed to be read when sitting inside the cab, the green light can clearly be seen through the back windows of the cab. It is also visible when standing next to the B-pillar and looking up through the side windows.
Trace Gas Levels Detected
A steady yellow 'Trace Gas' LED indicates a gas concentration greater than 20% of the LEL for that gas has been detected. A sensor has to detect an excess of 20% LEL for two continuous seconds before this lamp will illuminate.
The yellow 'Sensor Zone' LED will flash to indicate what sensor is reporting the LEL levels. A single flash indicates zone 1, the left-hand sensor, and a double flash indicate zone 2, the right-hand sensor.
The detection of trace gas amounts will not cause the buzzer alarm to sound.
If ambient gas levels return to normal, the yellow 'Trace Gas' LED will go out and the green 'Systems Normal' LED will illuminate.
What To Do When Trace Gas Levels Are Detected
Look in the mirrors for evidence of white smoke escaping from behind the cab or from the batteries.
If there is smoke:
-
Pull over into a safe location as soon as possible.
-
Turn off the ignition, set the park brake, press the eStop button, and exit the vehicle.
-
Move a safe distance from the vehicle, fifty to one hundred feet if possible. Avoid inhaling the smoke. When in a safe location, call emergency services.
Notice: If possible, set out reflectors or flares to keep other people and vehicles at a safe distance and to guide them around the vehicle.
If the alarm is false, do not consider the area clear until emergency responders have declared the area safe, all alarm indicators are OFF, and the alarm panel light illuminates green.
If smoke or flames are coming from a high voltage battery, trained emergency responders should use large amounts of water to cool the battery. Battery fires can take up to 24 hours to extinguish. Emergency responders should consider allowing the battery to burn in place.
Do not tow a vehicle until all fires have been extinguished and the high-voltage batteries are no longer giving off heat. After a fire, do not store a towed vehicle indoors.
If there is no smoke:
-
Pull over into a safe location
-
Turn off the ignition, set the park brake, and exit the vehicle.
-
If applicable, call a supervisor for assistance.
-
Observe the vehicle for fifteen minutes.
-
If you observe smoke, move a safe distance from the vehicle, fifty to one hundred feet if possible. Avoid inhaling the smoke. When in a safe location, call emergency services.
-
If no smoke is observed after fifteen minutes, enter the truck and check for high-voltage or battery faults and warnings.
If faults are active HV related fault codes that prevent High Voltage from energizing, contact a supervisor. If there are HV related fault codes, but HV is energized and truck is able to drive, follow the information displayed on the instrumentation cluster or B-panel (most likely drive to nearest service center).
If no faults are present, drive the vehicle to the nearest service center. The vehicle should not be in operation until the problem is diagnosed and resolved.
Significant Gas Levels Detected
Warning: Immediately bring the vehicle to a safe stop when the buzzer alarm sounds and the lower red 'Significant' LED illuminates. Apply the park brake, turn off the ignition, press the eStop button, and get clear of the vehicle.
Waiting to see if the upper red 'Significant' LED illuminates after one minute could result in severe personal injury or death.
Warning: If outside the vehicle when the alarm buzzer sounds, do not attempt to open or enter the cab to retrieve items, turn off the ignition, or hit the eStop button; doing so could result in severe personal injury or death.
Note: The green 'Systems Normal' light is extinguished when the red 'Significant' LED illuminates. This does not indicate that the system has lost power or is not operating normally.
If gas concentrations increase to the 50% LEL for that gas, and maintain or exceed that level for six continuous seconds, the lower red 'Significant' LED illuminates and the buzzer alarm activates and emits a continuous alarm.
If ambient gas levels return to normal, the lower red 'Significant' LED goes out and the green 'Systems Normal' LED illuminates.
If gas concentrations greater than 50% of the LEL for that gas persist or increase for more than one minute, the upper red 'Significant' LED illuminates and the buzzer alarm starts beeping.
Once the upper 'Significant' LED comes on and the buzzer starts beeping, they continue to do so until the 'System Reset' button is pressed.
If the 'System Reset' button is pressed before ambient gas levels have dropped, the gas detection system will restart the alarm sequence.
What To Do When Significant Gas Levels Are Detected
Look in the mirrors for evidence of white smoke escaping from behind the cab or from the batteries.
If there is smoke:
-
Pull over into a safe location as soon as possible.
-
Turn off the ignition, set the park brake, press the eStop button, and exit the vehicle.
-
Move a safe distance from the vehicle, fifty to one hundred feet if possible. Avoid inhaling the smoke. When in a safe location, call emergency services.
Notice: If possible, set out reflectors or flares to keep other people and vehicles at a safe distance and to guide them around the vehicle.
If the alarm is false, do not consider the area clear until emergency responders have declared the area safe, all alarm indicators are OFF, and the alarm panel light illuminates green.
If smoke or flames are coming from a high voltage battery, trained emergency responders should use large amounts of water to cool the battery. Battery fires can take up to 24 hours to extinguish. Emergency responders should consider allowing the battery to burn in place.
Do not tow a vehicle until all fires have been extinguished and the high-voltage batteries are no longer giving off heat. After a fire, do not store a towed vehicle indoors.
If there is no smoke:
-
Pull over into a safe location
-
Turn off the ignition, set the park brake, and exit the vehicle.
-
If applicable, call a supervisor for assistance.
-
Observe the vehicle for fifteen minutes.
-
If there is smoke, move a safe distance from the vehicle, fifty to one hundred feet if possible. Avoid inhaling the smoke. When in a safe location, call emergency services.
-
If there is no smoke, enter the truck and check for high-voltage or battery faults and warnings.
If there are active HV related fault codes that prevent High Voltage from energizing, contact a supervisor. If there are HV related fault codes, but HV is energized and truck is able to drive, follow the information displayed on the instrumentation cluster or B-panel (most likely drive to nearest service center).
If no faults are present, and if applicable, call a supervisor to discuss next steps. The vehicle cannot be driven until the problem is diagnosed and resolved.
System Faults
If a sensor has been disconnected or malfunctioned, the green 'System Normal' LED goes out and the yellow 'System Fault' LED illuminates. The yellow 'Sensor Zone' LED flashes to indicate the zone of the malfunctioning sensor. A single flash indicates zone 1, the left-hand sensor, and a double flash indicates zone 2, the right-hand sensor. If the system fault indicates a sensor zone not on the vehicle, the gas detection system needs to be reprogrammed.
If the wiring from the control panel to sensor has been damaged, only the 'System Fault' LED flashes.
If a sensor has been disconnected, malfunctioned, or the control panel wiring has been damaged, have the vehicle serviced. Do not operate the vehicle without a functioning gas detection system.
To reprogram the gas detection display:
-
Press the 'System Reset' and 'Silence' buttons at the same time for at least ten seconds.
-
Release the buttons when the alarm sounds and the 'Systems Normal' LED flashes. This indicates you have entered programming mode.
-
Press the 'Silence' button to cycle through the different sensor zones. The sensor zone LED flashes to indicate the current sensor.
-
If the amber 'Trace Gas' LED illuminates on the current sensor zone, this means the current sensor zone is being monitored. Press the 'Test' button to disable/enable monitoring of the current sensor zone.
-
Wait one minute. If no action is taken for one minute, the alarm sounds twice to notify programming is complete and normal operation is engaged.
For the functions of all lights and buttons on the overhead console, see Table .
Table 1, USA Pro Shoreline AMGaDS III Plus Control Module Functions
|
USA Pro Shoreline Multizone Detection System Control Module |
|||
|---|---|---|---|
|
Item |
Display |
Function |
Action Required |
|
'System Normal' LED |
Green (illuminated) |
System is on and all components are operating properly. |
None required. |
|
Unlit |
Detection system is not functioning. |
Ensure the batteries are connected and replace any blown fuses. If the gas detection system is still not functioning, immediately replace the system. |
|
|
'Trace Gas' Concentration LED |
Yellow (illuminated) |
Minor gas concentration detected. |
Use caution and watch the control panel. |
|
'Significant' Gas Concentration LEDs |
Red Lower Bar (illuminated) |
Dangerous gas concentration at or above 50% of the LEL have been detected. The buzzer alarm sounds. The green 'System Normal' LED goes out. |
Quickly bring the vehicle to a safe stop. Apply the park brake, turn off the ignition, exit the cab, and call emergency responders. |
|
Red Upper Bar (illuminated) |
Dangerous gas concentration at or above 50% of the LEL present for over 1 minute. |
Immediately bring the vehicle to a safe stop. Apply the park brake, turn off the ignition, exit the cab, and call emergency responders. |
|
|
'Sensor Zone' LED |
Off |
Sensors are functioning properly. |
None required. |
|
On (flashing) |
Specifies sensor zone. Single flash designates zone 1. Double flash designates zone 2. |
If paired with gas concentration LED, this indicates which sensor is registering the gas concentration. If paired with 'System Fault' LED, this indicates which sensor is registering as non-operational. |
|
|
'System Fault' LED |
Off |
Sensors are functioning properly. |
None required. |
|
On |
A system component has malfunctioned. |
If only the 'System Fault' LED is flashing, verify the wiring from the control panel to the sensor. If the 'Sensor Zone' LED is flashing, verify the designated sensor is connected and operational. Replace damaged sensors immediately. |
|
|
'System Reset' Switch |
— |
Resets the system after an alarm. |
Reset the system only after the gas has cleared and emergency responders have declared the vehicle safe. |
|
'System Reset' Switch LED |
Yellow (illuminated) |
Indicates the system has been successfully reset. |
None required. |
|
Off |
Normal condition. |
None required. |
|
|
'Test' |
— |
Pressing the switch illuminates all the control panel LEDs and transfers all I/O contacts. |
Test the system daily. |
|
'Silence' Switch |
— |
Silences the alarm buzzer. |
Press to silence the alarm buzzer. |
|
'Silence' Switch LED |
Yellow (illuminated0 |
Indicates the buzzer is active but silenced. |
Quickly bring the vehicle to a safe stop. Apply the park brake, turn off the ignition, exit the cab, and call emergency responders. |
|
Off |
Normal condition. |
None required. |
|