Di-Directional Isolator

dougrainer wrote:
1. Intellitec Bi directional relay controllers do NOT fail very often. Most I have replaced was due to moisture/corrosion. Rarely do they just "fail".
2. I would suspect your chassis Alternator/Regulator is not up to full operation and is failing when you have the load of the Inverter in transit
3. The Bi relay is a very LOW amp device. It just sends a 12 volt signal to the Big Boy solenoid to combine both battery banks to charge when it sees the 12 volt ignition wire/spade terminal get 12 volts
4. On Shore Power, IF the dc voltage goes OVER 13.1 volts and stays over, it will close that Big Boy to charge the CHASSIS battery bank. Conversly, if it sees OVER 13.1 from the chassis side it closes the Big Boy to charge the COACH batteries in transit.
5. How Many Bi relay's have you replaced? Other than corrosion, the other culprit would be HI dc amps inputed to the Bi relay box. Any Amps over 5 amps may destroy the Bi Relay box.
6. Here is a link for the Intellitec if you do not have the info.
7. Also, your batteries (or just 1 or 2) may be bad and causing the charging problem. I would have all 4 Coach batteries tested. If 1 is bad, replace all 4. Doug

https://www.intellitec.com/assets/pdf/1453-intellitec-pdf-template-53-00839-100.pdf

Here is what happened today..
Removed the Bi-Directional Isolator,
With jumper wires, I connected the ground post of the Isolator to the negative of the chassis battery
and the Ignition post to the positive side of the battery.
Then measure the voltage on the relay post 12.4.

Proving the Bi-Directional circuit works.

With the wires removed for the Bi-D I check each one for proper voltage/continuitity
Ignition wire shows 13.4 (battery voltage) with key on. 0 with key off.
Generator shows 12.8 with gen/set running.
Coach battery shows 13.4
Ground show no continuity to a known good ground.

repaired the connection to ground, I believe it is fixed.