The Model AECM103 is an Automatic Engine Control Module designed to automatically start and stop the engine. It will indicate the operational status and fault conditions, automatically shut down the engine and indicate the start engine failure by a flashing LED on the front panel. Other simultaneous faults are indicated by steady LED (except preheat flashing LED).

........................................................................................................................................................................................... Current Configuration:  (pre-heat output is enabled via terminal 13)

10 seconds after the preheat relay [terminal 9] is energized and timed out [indication:flashing LED on the panel],feeding battery+ve on terminal 7 to terminal 9 and thence on the preheat circuit, the module will begin its start sequence: the fuel solenoid relay [terminal 5] is energized, feeding battery +ve on terminal 7 to terminal 5 and thence to the fuel solenoid circuit, the start relay [terminal 2] will energize, feeding battery +ve on terminal 7 to terminal 2 and thence on to the start circuit. The crank period is set for 12 seconds.

If the engine has not fired by the end of 1st attempt, the starter is turned off for 20 sec. period. The sequence will then repeat up to a maximum number of start attempts.

During engine cranking and for a short time afterwards the protection hold-off timer is active and the relevant alarms inputs are inhibited. This enables the engine to start and achieve normal running conditions. Once the timer has expired, the inputs are enabled providing normal protection from the module.

Following a successful start, sensed when AC alternator's voltage rises above 40% of nominal, the glow plug is turned off, the crank relay is de-energized and latched out to prevent reengagement of the starter with the engine running

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The starter relay can only energize for 2nd and 3rd  crank cycle if "Low Oil Pressure" is sensed, to confirm that the engine is stationary. This is designed to prevent damage to the starter and ring gear in the event of the control module not sensing that the engine has started (i.e. terminals 11 and 12 are not connected to the alternator AC output or AC alternator has failed to generate).

Should the engine still fail to start after the maximum number of attempts, START FAIL is displayed and the starter is latched out until reset via stop position of manual starting switch or terminal 1.

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SPECIFICATION [default settings]

DC Supply: generator battery 12V or 24V

Max. Standby Current: 10 mA @ 12 V

Alternator Input Range:  300 VAC max

Under speed shutdown: @ 30 Hz [45Hz for USA and Canada]

Over speed shutdown: @ 57 Hz [69Hz for USA and Canada]

Number of attempts: 3 [10 attempts max if required]

Crank duration: 12 sec

Preheat time: 10 sec

Load on time delay: 60 sec

Load off time delay: 60 sec

Hold-off timer set for: 7 sec

Starter relay output: 2A max [12A max output available, please place your order]

Fuel solenoid output 2A max [12A max output available, please place your order]

Glow plug relay output: 2A max

Load control relay output[optional]: 2A max

Dimensions: 72 X 72 X 82/116mm

Operating Temperature Range: -30 to +70°C.

Wiring diagram. Click on picture to enlarge.

Case dimentions. Click on picture to enlarge.