Rev. 03/2019 163
10.1 Possible Faults
The MIC5 ignition controllers include several safety functions that can shut down the engine in
case of fault:
– Overspeed protection
– External shut-down contact (Start/Stop)
– Misfire detection (primary)
– Internal failure of the high voltage supply
– Output Error Detection
– Shut down in the case of a faulty pickup or faulty pickup signals.
– Alarms
– Faulty voltage supply
– External EMI signals
10.2 Causes of Faults
10.2.1 Overspeed
The engine speed has exceeded the set overspeed value.
Potential Causes
– Speed controller does not function properly
– Fuel supply to engine is not optimal.
– Faulty pickup signal
10.2.2 Output Error Detection
An internal failure of the high voltage supply or a defective output switch occurs.
Potential Causes
– Hardware fault on the MIC5
– Defect in the wiring (short circuit or open circuit)
10.2.3 Misfire Detection (Primary)
Misfiring due to an open circuit on the primary side was detected and displayed in the runtime
data.
Potential Causes
– Defect in the output wiring
– Ignition coil defective
10 Errors
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