Section 16 Failures and After-Sale Services  16-12 
 
Symptom  Cause  Action 
AIS information is not 
displayed. 
 
The communication is not set 
correctly. 
Set the communication correctly. 
The power supply for the AIS 
equipment is not turned on. 
Turn on the power supply for the AIS 
equipment. 
The AIS 
equipment does not perform 
positioning. 
Check the state of the AIS 
equipment. 
The connection with the AIS 
equipment is abnormal. 
Check the connection with the AIS 
equipment. 
When AIS equipment is connected to 
the terminal board circuit 
(CQD-2322), check if the LED of the 
corresponding port is lit at data 
reception.   
The internal wiring is faulty. 
Make a request to the distributor for 
repair. 
The processing unit (NDC-1678) is 
faulty.   
Make a request to the distributor for 
repair. 
The power is not supplied to the 
serial LAN interface (CMH-2370) 
inside of junction box NQE-1143. 
(Case where the AIS equipment is 
connected to junction box NQE-1143)
Turn on the power supply for the 
serial-LAN interface circuit. 
The power is not supplied to the 
serial LAN interface (CMH-2370) 
inside of junction box NQE-1143. 
(Case where the AIS equipment is 
connected to junction box NQE-1143)
Make a request to the distributor for 
repair. 
The azimuth of the Gyro 
compass is not 
displayed.   
Alternatively, the azimuth 
rotation direction is not 
displayed correctly. 
The communication is not set 
correctly. 
Set the communication correctly. 
The power supply for the Gyro 
compass equipment is not turned on.
Turn on the power supply for the 
Gyro compass equipment. 
The connection with the Gyro 
compass equipment is abnormal. 
Check the connection with the Gyro 
compass equipment. 
When Gyro compass equipment is 
connected to the terminal board 
circuit (CQD-2322), check if the 
corresponding LED is lit at signal 
reception. 
The internal wiring is faulty. 
Make a request to the distributor for 
repair. 
The processing unit (NDC-1678) is 
Make a request to the distributor for 
repair.