Kongsberg Simrad ST90, Reference Manual

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WARNING
High voltages are used. This equipment must be serviced only by qualified
personnel familiar with high-voltage equipment and the potential hazards
involved. Failure to observe this precaution could result in bodily injury.
You may be exposed to electric shock. Read and understand the applicable
first aid instructions related to electric shock.
b Locate the
Motor Protecting Switch
(S301).
c Deactivate the
Motor Protecting Switch
(S301) by pressing the operating handle
to OFF .
d Locate the hand crank inside the Motor Control Unit.
e Remove the hand crank from its storage position.
f Remove the plastic plug on the top cover of the hull unit.
g Mount the hand crank onto the stub shaft through the hole in the top cover.
h Locate the brake release screw on the motor.
i Use an 4 mm Allen key to rotate the screw clockwise until the motor brake is
released.
j Turn the crank until the transducer is fully lowered.
4 Hoisting the transducer
a Turn the crank until the transducer is fully retracted.
b Loosen the brake release screw to engage the motor brake.
c Check with the hand crank to ensure that the motor brake is engaged.
d Remove the hand crank from the stub shaft, and mount it in its storage position in
the Motor Control Unit.
e Activate the
Motor Protecting Switch
(S301) by pressing the operating handle to ON .
f Make sure that the
Hoist/Lower Switch
is set to REMOTE .
Note
For normal operation from the Operating Panel, the switch must be set to
REMOTE.
g Close the door on the Motor Control Unit.
5 Insert the mains fuses for the hull unit.
Maintenance procedures