Furuno Multi Instrument FI-504 - Manual (Page 22)

2. MAINTENANCE, TROUBLESHOOTING
14
2.2 Troubleshooting
If you feel the equipment is not functioning properly, follow the proce-
dures in the table below to try to restore normal operation. If normal op-
eration cannot be restored, do not attempt to check inside the cabinet.
There are no user-serviceable parts inside.
Troubleshooting
Problem Possible cause Remedy
Display is
blank. Panel is
not lit.
• Power supply
• Cabling disconnected or
damaged.
• Check power supply.
• Check cabling.
Power is on but
no or some
data. Sensor is turned off.
Cable from sensor is disconnected
or damaged. • Turn on sensor.
• Check cabling.
Inaccurate data • Electromagnetic field generating
equipment is in operation.
• Cabling from sensor is damaged.
• Sensor is improperly aligned
(where applicable).
• Turn off all electromagnetic field
generating equipment. Turn them on
and off one by one. Check the dis-
play. Relocate offending equipment
or this instrument as appropriate.
• Check cabling.
• Check installation. If installation is
proper, an offset may be applied to
certain data. For details, see section
1.7.