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Upon error detection, the controller records its conditions, i.e. operating parameters of the gas system,
including: pressure, gas temperature, reducer temperature, engine rpm, manifold negative pressure,
petrol injection pulses and gas dose. Such data is normally called a frozen frame of the error and
allows analyzing and detecting problems in gas system operation.
Fig. 29
„Frozen” frame of injector error
2.8.2. Gas controller message
Messages are prompts that are not necessarily related to detection of events limiting or preventing the
operation of the autogas system, but signal the required verification of the configuration. Unlike the
errors, message prompts are displayed in blue.
The controller can generate the following messages:
Description in AC STAG application
Meaning
Gas injectors fully open! Check the Lambda
sensor at maximum load
Looping of gas injection, i.e. one gas injection pulse
is overlapped by another pulse. If the Lambda
sensor during the message display works in a “rich”
mode, the error can be ignored; otherwise, use
larger injector nozzles to reduce the multiplier
LPG / CNG locking: review
The gas installation requires a service inspection.
“Lock LPG/CNG” option checked. The controller
will not operate in gas fueling mode until the
service message is erased.
New settings
The controller indicates new settings. The message
is usually displayed when new firmware is installed
to remind about the new options.
Low gas temperature
Low gas temperature detected in gas fueling mode.
Check the condition and method of reducer
installation.
Ignition switch signal missing
The controller detects injection pulses with the
missing
ignition
switch
signal.
Check
the
connection of the ignition positive wire.