Dear Amel Group Friends
I’m asking you guys if someone had the
same or similar experience and what is your advice for my question:
I have a Negative Leak light on the 24V
Pump-Motor of the Dessalator Duo. There is a Bonding wire (yellow/green) that
runs from the Bonding strap in the grey-water sink to the Dessalator. But this
wire is disconnected on the Dessalator unit. When I’m connecting the 24v pump
directly to the bonding system the negative leak remains. Light is still
The light does only switching OFF when I’m
switching the pump on, or if I’m disconnecting the negative
BTW: I cannot see any corrosion on
the Dessalator unit. The DC motor itself has no contact to saltwater, - it's
only the pressure pump in contact with saltwater (but no 24V connection).
- Does it mean I need a new 24V DC
- Are there any longterm experiences what
can happen if a negative (or positive) light is not fixed?
- What is the affect and result of a
longterm neg. vs pos. leak?
It’s very easy to get miliAmps of current
on a 24V motor with brushes and wires, etc. Are we AMELies to paranoid with
P.S. I still not fully understand how
these lights working. To my understanding it is indication a leak from Masse
- and Masse + against the AMEL bonding system. Maybe I’m wrong?
In the circumstance you describe, the light indicates that there is a connection (resistance) between either the positive or negative and the case of the macerator pump. That "connection" is usually saltwater leaking past the seal on the pump. It is an "early warning system" that your seal is leaking and your pump will fail. A switch such as you suggest will certainly be a "see no evil" solution.🙈😀 You could accomplish the same by disconnection the yellow/green wire from the case, but, don't you really want to know when you have a seal leak.
720 Winnie St.
Galveston, Texas 77550
[Edited Message Follows]
I have been diligently checking the Masse- and + lights in the companionway. Over the past 5 years when one of the lights go on (usually the Masse - ) I go and disconnect the power lines to the forward or aft head and sure enough, the leak of current to ground stops and I replace that Jabsco pump. Recently the Masse light did not go out until I had unplugged both the heads at the same time, indicating to me that both the head pumps were leaking to ground.
It occurs to me that instead of replacing the pump, I could just install a toggle switch to the offending brown or blue wire, so that I can turn the circuit on when anyone uses the head, and turn it off in the interim. Then I could continue to use the offending pump until it dies a natural death.
Am I fooling myself or would installing that switch stop the current leakage to the Amel bonding system?
SM2K #400 Brava