Drive Component - Webasto Air Top Evo 3900 Workshop Manual

Air Top Evo 3900/5500

6.4.4 Drive component

See Fig. 903, Item 1
Drive unit
Externally damaged?
no
Installation of component
in unit => short circuit to metal
parts (heat exchanger etc.)?
no
Resistance outside
0 - 6 ohms?
no
Start at 10/16 V?
yes
Bearing noises?
no
2
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Procedure
yes
2
Visual inspection
yes
1
Continuity
measurement
yes
1
no
1
Motor start-up
yes
1
Subjective test
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Testing and Visual
measuring
equipment
Digital
multimeter
Ensure correct polarity (+)/(–)
(–) = black
Voltage source
(+) = red
Function Tests
IMPORTANT
607