Raymarine autopilot ST4000+, Руководство по обслуживанию

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Chapter 3. Wheel Drive Actuator
Autopilots Service Manual 83115-1 11
Chapter 3. Wheel Drive Actuator
3.1 Wheel Drive Actuator test
Carry out the passive and active tests detailed in Figure 6.
D2386-1
PSU
12V 15A
Switch
Fuse/CB
12A
Figure 5. Wheel Drive Actuator test connections
Change damaged
components
Check gears,
belt, rollers,
belt tension,
eccentric, drive
lever, motor
Start
No
Yes
Visually inspect unit
Rotate drive ring by hand
with clutch disengaged
No
Yes
OK
OK
Check resistance across
motor connector pins 2 and 3
is approximately 1 to 2 ohms
Change/adjust
as necessary
No
Yes
Check wiring
and connector
OK
Check motor
Change as
necessary
OK
D2390-1
No
Yes
Connect power supply
as in Figure 5
OK
No
Yes
Change/adjust
as necessary
Switch on.Check drive ring
moves in opposite direction
to that of first test and
current is less than 2A
No
Yes
OK
Actuator OK.
End of test
Switch on, and with clutch
engaged, check drive ring
moves and current is less
than 2A
Restrain drive ring rotation
until 6.5A is obtained. Check
that belt does not slip.
OK
No
Yes
Reverse polarity of supply
Restrain drive ring rotation
until 6.5A is obtained. Check
that belt does not slip.
No
Yes
OK
Check gears, belt,
rollers, belt
tension, eccentric,
drive lever, motor
Change/adjust
as necessary
Check gears, belt,
rollers, belt
tension, eccentric,
drive lever, motor
Figure 6. Wheel Drive Actuator test flowchart