tennat NOBLES S6, Техническое и сервисное руководство

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PLDC04348
REVISION 00
November 09, 2020
TECHNICAL OFFICE
November 30, 2020
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A1.1 Checking centre brush motor current draw
1
Undo the fixing screws of the top cover, and remove the cover.
2
Make sure that the batteries on the machine are charged (12 V ± 1 V).
3
Use a clamp-on ammeter with a full scale reading of at least 200 A (amperes).
4
Move the machine onto a flat and smooth floor to ensure a correct current reading.
5
Pick out the Red wire of the centre brush motor and apply the clamp-on ammeter to it.
6
Run the brush at speed 2, selected by way of the control panel.
7
Take note of the reading on the ammeter display and compare it with the values in the table.
8
If the value falls within the range indicated in the table, disconnect the instrument and reinstate the top cover of
the machine.
9
Conversely, if the value is at variance with those indicated in the table, proceed to make the following checks.
10
Disassemble the side brush and check that the current draw under no-load conditions is within the values in table.
10a
Should the reading indicate a value different to those in the table (typically higher), check for wear on the
carbon brushes of the motor, also for wear on the drive belts and cleanliness of the relative pulleys, and
for noise from the pulley bearing.
10b
If the reading is within the range of values indicated in the table, check that the brush is not rubbing on the sides
or on the roller, and that there is no abnormal noise coming from the centre brush free wheel bearings.
10c
Replace the brush motor with a new one.
Uncouple the side brush to ensure a more accurate reading.
G
6
Current draw A (amperes) Min Max
No load (without brushes) 2.7 A 3.3 A
Load applied (brushes operating) 5.5 A 6.5 A
Carry out the test with the machine at standstill to ensure the brush is not rotated 'against' the
drive, as this could result in a higher current draw reading.
G
5