Hoisting And Lowering From The Sonar Room - Simrad SH90 - REFERENCE MANUAL REV A Reference Manual

On-board maintenance
Fuse F301
The Motor Control Unit contains an internal +24 Vdc power
supply for the control electronic. This power supply is powered
from two phases of the 3-phase voltage, and is fused with
F301
which is a 500 mA Slow Blow type. The fuse is located on the
right-hand side on the 3-phase terminal .
E301

Hoisting and lowering from the sonar room

In case of failure in the normal hoist/lower operation controlled
from the Operating Panel, or for maintenance purposes, the
transducer may be hoisted and lowered from the sonar room.
Three different procedures may be used.
In the event of improper operation, the powerful 3 kW electric
motor may cause serious damage to the equipment and/or injury
to personnel.
Therefore, before you start the operation, read carefully through
the relevant procedure(s). You will then familiarize yourself
with the method .
Figure 53 Location of S301, S302, K301, K302, L1 and L2
Manual lowering and hoisting using hoist/lower
switch S302
If both the 3-phase voltage for the hoisting motor and the +24
Vdc from the internal power supply are available (indicators
L1
and are illuminated), the transducer can be hoisted or lowered
L2
by switch in the Motor Control Unit.
S302
197
323775/A