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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. 17 „Frozen” fame 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 Looping of gas injection, i.e. one gas injection
sensor at maximum load
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.
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