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11. MAINTENANCE, TROUBLESHOOTING
11-5
11.5 Warning Messages
The table below shows the warning messages which may appear on the display.
All warning messages are accompanied by an audio alarm, which you may
silence with the [R/B AUDIO] key.
Error messages
Message Meaning, Remedy
Power supply
OVERVOLTAGE!!
RETRACT TRANSDUCER AND TURN OFF
POWER. CHECK SHIP’S MAINS VOLTAGE.
PRESS [R/B] KEY TO TURN OFF ALARM.
This message blinks at the screen center and
the buzzer sounds when the voltage supplied
to the transceiver unit is excessive.
Transmission is stopped if the equipment is
transmitting, to protect the transducer and
transmitter power section from damage.
Silence the buzzer with the [R/B AUDIO] key,
retract the transducer and turn off the power.
Have a qualified technician
check input
voltage.
Transceiver unit
NO RESPONSE FROM TRANSCEIVER
UNIT.
TURN OFF AND ON POWER AGAIN, OR
CHECK POWER LINE TO TRANSCEIVER
UNIT. PRESS [R/B] KEY TO TURN OFF
ALARM.
This message blinks at the screen center and
the buzzer sounds when there is no reply
from the transceiver unit. Press the [R/B
AUDIO] key to turn off the buzzer. Have a
qualified technician
check the set.
ELECTRIC CHARGE!!
RETRACT TRANSDUCER AND TURN OFF
POWER. CHECK SHIP’S MAINS VOLTAGE.
PRESS R/B KEY TO TURN OFF ALARM.
This message blinks at the screen center and
the buzzer sounds if the +B voltage of
capacitors in the transceiver unit can not be
charged to predetermined voltage within the
specified time. Press the [R/B AUDIO] key to
silence the buzzer. Have a qualified
technician check the set.
OVER TEMPERATURE!!
RETRACT TRANSDUCER AND TURN OFF
POWER.
PRESS R-B KEY TO TURN OFF ALARM.
This message blinks at the screen center and
the buzzer sounds when the temperature in
the power supply block has exceeded 85°C.
Press the [R/B AUDIO] key to silence the
buzzer. Turn off the unit and have a qualified
technician check the set.
Hull unit, transducer
TRANSDUCER NOT RETRACTED!!
CUT OFF POWER LINE TO MONITOR UNIT
AND HULL UNIT. PRESS [R/B] KEY TO
TURN OFF ALARM.
This message blinks at the screen center, the
buzzer sounds and the LEDs above keys
blink if the transducer is not raised within 26
seconds for 800 mm stroke or 33 seconds for
1100 mm stroke of pressing the [↑] key.
Press the [R/B AUDIO] key to silence the
buzzer. The reason may be the transducer is
tangled in the net or its shaft is bent. Try
raising it from the hull unit as shown in
section 11.9.