Kongsberg Simrad SU90 Manual page 33

Sonar room steps
These tasks are done in the sonar room.
Prerequisites
The SU90 system is turned on and operates normally. Neither tools nor instruments are
required.
Context
Certain steps in this procedure are location specific.The steps marked [Bridge] are done
on the bridge.
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.
The Hull Unit Controller is an optional part of the SU90 system. The Hull Unit
Controller provides power and direction to the hoisting motor, and thus controls the
lowering and hoisting of the transducer. The unit also controls the gate valve. The gate
valve must open before the transducer is lowered, and close after the transducer has been
hoisted. When supplied, it replaces the Motor Control Unit normally mounted on the
hull unit gantry. The Motor Control Unit cabinet is used as a junction box.
In the event of problems or malfunctions:
1 On the Motor Control Unit:
• Locate the
Motor Protecting Switch
• Set the switch to position OFF.
2 On the Hull Unit Controller: Set the mode switch to position OFF.
Procedure
1 [Bridge]: Make sure that you have sufficient water depth below the keel before
you lower the transducer.
2 Do the following preparations.
a Use a spanner to open the door on the Motor Control Unit.
b Locate the
c Locate the
d Close the door on the Motor Control Unit.
or:
a On the Hull Unit Controller: Set the mode switch to position REMOTE.
3 [Bridge]: Lower the transducer to its middle position.
409977/C
Motor Protecting Switch
(S302). Set the switch to position REMOTE.
Hoist/Lower Switch
(S301).
(S301). Set the switch to position ON.
Test procedures
33