Sorry to hear about your Furuno problems - unfortunately as others have said in this forum Furuno instruments fitted to FP boats are not very reliable. I have an Orana
fitted with Furuno by Ponchon, wind
,log and repeater. The Autohelm
and chart plotter are all Raymarine
which I fitted myself - they talk to the furuno instruments. All the Furuno instruments have been changed at least once under the warranty. Recently the depth
sounder/log/temperature stopped working over the winter period. The airmar sensor is not repairable as all the electronics
are sealed in resin. Repair - pay $250 for a new sensor - No I have purchased a $80 Hawkeye complete standalone depth sounder
which is not networkable - that doesn't worry me.
The story "But they do not install them according to Furuno specs and even worse Furuno France does not back up their warranty. I have Furuno instruments (one year old) they all burned up, the resistance reading was 660 ohms.They do not put terminators on the instruments. It is a fire hazard."
As an electronics engineer
I feel I am qualified to comment.
1) The only way a fire can be caused is by not correctly fusing the cable supplying the power i.e. most instruments (except chart plotters and autopilots which should be fused separately) consume 0.2 amp or less so your instruments (NMEA 2000) power supply should have been fused at 5 amps. So if you check the fuse boxes you should find an instrument fuse listed. 24v (your boat?) shorted through 660 ohms is 0.036 amps - that wouldn't cause any cable to catch fire. I am not even sure that fuses
are available below 0.1 amp - so that story isn't true. The lack of terminators wouldn't cause a fire but would probably prevent the networking from ever working. What is a real fire hazard on FP boats is the lack of house battery
fusing. A short on House batteries of 400-1000 ah WILL cause a major fire. So does your boat have a main 500A fuse on the house battery
- my Orana
does only because I fitted one, FP didn't. Indeed apparently most boat manufacturers don't fit them!
2) On my Orana Ponchon wired the NMEA 2000
network up using a waterproof box and wago connectors which connect to the bare ends of the network cables
. NMEA 2000
networks use 60 ohm to terminate the network so Ponchon used a 120 ohm resistor and the internal 120 ohm termination of a FI-503 on my network. Technically there is nothing wrong with that approach. The Furuno junction box FI-5002 is only a waterproof box fitted with various screw connectors (probably inferior to wago connectors) on a printed circuit board which no doubt furuno charges a lot of money
for? Indeed on page 17 of the FI-503 (digital repeater) manual a diagram shows direct connection from the battery to the FI-5002 junction box - I can so no sign of a fuse in the junction box - it that is the case - that is also wrong.
In conclusion Ponchon have made a cost cutting installation
by not using an overpriced Furuno junction box which provided it has been externally fused correctly is NOT technically wrong and certainly on my boat that installation
hasn't caused any of the unreliability issues with my Furuno instruments. However as a customer of FP purchasing
an expensive boat should it have been installed that way is probably highly questionable.