tennat NOBLES S6, Техническое и сервисное руководство

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PLDC04348
REVISION 00
November 09, 2020
TECHNICAL OFFICE
November 06, 2020
55
of
58
1
Disconnect side brush motor from main wiring loom
and connect directly to battery.
A
If motor does not turn, go to point 2.
B
If motor turns, go to point 4.
2
Check integrity of motor carbon brushes.
See heading B2.2.
A
Replace carbon brushes if worn.
B
If carbon brushes are intact, go to point 3.
3
Check continuity of the brush motor wiring from
connector to carbon brushes.
A
If continuity is unaffected, replace the motor.
B
If continuity is broken, restore efficiency of the
wiring.
4
Check continuity of the wiring between brush motor
and power circuit board.
A
If wiring is damaged, repair or replace as necessary.
B
If wiring is intact, go to point 5.
5
Check continuity of the wiring between display
circuit board and power circuit board.
A
If wiring is damaged, repair or replace as necessary.
B
If wiring is intact, go to point 6.
6
Apply tester to PIN 6 +5Vdc and PIN 2 GND of the
display pcb: pressing the brush controls, the voltage
reading should be 2.5Vdc for Brush 1 and 1.67Vdc
for Brush 2.
A
If voltage readings are as expected, replace the
power circuit board.
B
If voltage readings are not as expected, replace the
display circuit board.
E1.1.6 Side brush not rotating.
1
Disconnect centre brush motor from main wiring
loom and connect directly to battery.
A
If motor does not turn, go to point 2.
B
If motor turns, go to point 4.
2
Check integrity of motor carbon brushes.
See heading A1.4.
A
Replace carbon brushes if worn.
B
If carbon brushes are intact, go to point 3.
3
Check continuity of the brush motor wiring from
connector to carbon brushes.
A
If continuity is unaffected, replace the motor.
B
If continuity is broken, restore efficiency of the
wiring.
4
Check integrity of drive belt.
A
Replace belt if degraded.
B
If belt is intact, go to step 5.
5
Check continuity of the wiring between brush motor
and power circuit board.
A
If wiring is damaged, repair or replace as necessary.
B
If wiring is intact, go to point 6.
6
Check continuity of the wiring between display
circuit board and power circuit board.
A
If wiring is damaged, repair or replace as necessary.
B
If wiring is intact, go to point 7.
7
Apply tester to PIN 6 +5Vdc and PIN 2 GND of the
display pcb: pressing the brush controls, the voltage
reading should be 2.5Vdc for Brush 1 and 1.67Vdc
for Brush 2.
A
If voltage readings are as expected, replace the
power circuit board.
B
If voltage readings are not as expected, replace the
display circuit board.
E1.1.5 Centre brush not rotating.