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Test bench MS002 COM
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5. Screw the adapter on the positive terminal of the alternator.
6. Connect the power cable B- to the unit body, then connect the power cable В+ to the adapter
at the negative terminal of alternator.
6.2. Alternator testing
1. Press Alternator & starter tester, then press button 12V/24V to choose the required voltage
referring to the specifications of the diagnosed alternator.
WARNING! With the pressing of the button Alternator & starter tester you start the mode of
diagnostics of Lamp alternator types.
2. Connect the bench diagnostic outputs (ref. 3, fig. 3) with the alternator connector terminals.
3. Choose the relevant alternator type on the control panel.
3.1. If the diagnosed alternator is of COM type, wait until the bench identifies ID and TYPE of
alternator.
3.2. If the alternator has a terminal: L, D+, I, IL, 61, the control lamp indicator shall light up.
3.3. If the diagnosed alternator is of COM type, the notification on the mechanical failure MEC
will appear near the indicator ERROR.
4. Rotate the knob ROTATION SPEED to the left/right referring to the alternator rotation direction
(commonly, alternators rotate clockwise - if you look from pulley side) and set the rotation speed
within the limits of 100 - 150 rpm.
WARNING! For the alternators with the freewheel clutches, be more cautious when choosing
the rotation direction.
4.1. Visually inspect if the alternator rotates properly (the alternator shall not vibrate). If there
are the abnormal noises that may inform on the mechanical failure, stop the diagnostics.
5. Check the rotation speed when the generation starts as follows:
5.1. Set the voltage value 14.5V for 12V alternators and 29V for 24V alternators, rotating the knob
REGULATION GC.
5.2. With ROTATION SPEED knob, increase smoothly the speed until the alternator output voltage
is equal to nominated voltage. Most of the operative alternators start generation from 700 - 850
drive revolutions. Some alternators of COM type start generation at the speed higher than 1200,
besides, there are LRC alternators (Load Response Control) that have the temporary delay at
the output voltage variation.
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