Konsberg AIS 200, Installation Manual

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Kongsberg AIS 200 Installation Manual, rev. 2 Maintenance
7.2.1 Power supply failure
If the unit periodically restarts approximately every one minute, this could indicate a power
supply failure.
Use the following procedure to check for power failure:
1. Check that external power has been connected to the rear connectors.
2. Verify that supplied power is in accordance with technical power specifications, page 5.
3. Verify that power cable dimensions are minimum 2.5 mm
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7.2.2 GPS and VHF antenna cable connections
Typical problems when no GPS signal is received are that the GPS antenna cable and/or
connectors are damaged, or that the cables are not properly connected. In order to check for
antenna cable problems, ensure that the GPS antenna is disconnected. The Ohm reading
between the centre and the screen should normally be infinite if there is no short-circuit in the
cable. Make a short-circuit in the opposite end of the cable and measure the resistance. Now
the reading should be approximately 0 Ohm.
7.2.3 GPS and VHF antenna malfunction
Disconnect the GPS antenna cable at the rear side of the Mobile Unit. Measure the resistance
between the centre pin and shield in the cable (with the antenna connected). The GPS antenna
does not have a defined resistance that can be measured. Therefore, before measurements can
be carried out, the antenna end of the cable needs to be short-circuited. Measure between
centre conductor and shield. Resistance should be close to 0 Ohm.
Caution!
Switch off the power before disconnecting the antenna!
7.2.4 GPS receiver failure
During normal operation the GPS LED blinks green once each second. If the GPS LED on
the front of the unit blinks amber, the AIS 200 system computes no position data, the GPS
receiver inside the Mobile Unit should be checked.
Disconnect the antenna cable at the rear side of the Mobile Unit. The voltage output on the
GPS antenna connector should be approximately 4.8 – 5.0 V if the GPS receiver supplies
voltage to the antenna. If not, this indicates problems with the GPS receiver. Disconnect and
reconnect power to see if the Mobile Unit starts up as normal. If not, consult Customer
Support for advice.
If valid GPS position data are not received, reset the GPS receiver from the MKD menu.
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