212
476671/B
Procedure
1
Locate the pressure release plug.
2
Open the pressure release plug slightly to allow
pressurized air to escape.
3
Close the pressure release plug firmly.
Related topics
Setting to work, page 186
Starting up the hull unit, page 201
Checking the 3-phase connection for correct rotation
The electric hoisting motor on the hull unit requires 3-phase AC power for operation. The
Motor Control Unit is equipped with a Phase Watch Relay
(K303)
. This relay prevents
operation of the hoisting motor if the 3-phase AC power connections are wrong with respect
to the motor's rotational direction.
Prerequisites
• The MF90 system is turned off.
• The circuit breaker for the 3-phase
AC power is closed. AC power is
connected.
You must be equipped with a standard
set of tools. This tool set must comprise
the normal tools for electronic and
electromechanical tasks. This includes
different screwdriver types, pliers,
spanners, a cable stripper, a soldering
iron, etc. Each tool must be provided
in various sizes. We recommend that all
tools are demagnetized to protect your
equipment.
Context
The Phase Watch Relay
K303
is located
at the right side of the Motor Control
Unit. LED
L1
indicates that the Phase
Watch Relay
K303
is activated. This mean that the 3-phase voltage is applied, and that the
Simrad MF90 Installation Manual
Summary of Contents for Simrad MF90
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