User guide

FS 20/25 Operators Manual 901-10037001/1.1
Maintenance and Troubleshooting Page 5.
5
Kongsberg Simrad Mesotech Ltd.
Port Coquitlam, BC - Canada
5.3.2 Trawl Unit
The Trawl Unit is subjected to the harshest conditions, and therefore proper
handling and maintenance is crucial to ensure trouble free operation.
5.3.2.1 Handling Tips
• Though the trawl unit electronics are ruggedized for the fishing environment,
mishandling or repeated impacts may result in damage to, or failure of, the
electronic components. Care should be taken at all times to avoid dropping
or impacting the trawl unit or the individual components.
• Avoid scratching the surface of the sonar head and sensor module housings.
The anodized surfaces are there to protect the electronic housings from
corrosion and any damage to these surfaces will increase the likelihood of
corrosion.
• Ensure correct installation of the sonar head into the trawl housing to avoid
improper operation or damage to the transducer and shaft. Both the
retaining rings and the locating pin (or locating bracket) are required.
• Protect connector mating surfaces from corrosion and damage. At first sign
of damage, connectors should be replaced!
• Pigtails must be properly attached to trawl cable, and the connector mating
surface must be protected from moisture and dirt all times. Failure to do this
may result in water damage to cable, causing improper operation of the
sonar system.
5.3.2.2 Maintenance Schedule
For optimum performance and trouble free operation, follow the maintenance
schedule below.
• Beginning of Fishing Season
Service all connectors
• Every Two Weeks of Continuous Use
The trawl unit package should be opened and the components cleaned
with fresh water. The sonar head and sensor module should be
inspected for corrosion or damage. Service all connectors. The FS
processor should be checked and cleaned if required.