My Combimaster 3000/160 bricked a few months after I installed it back in 2021. I wasn’t using the
boat at the time so having it out of service didn’t matter. I was able to talk to tech support who gave me the following instructions. In the end nothing worked, I sent the unit back and they gave me a new one under the two year warranty. After successfully installing the new unit I reached out to find out what had failed and never received a response. The replacement has worked flawlessly ever since but this experience makes me nervous as this is a mission critical device.
It was part of a Mastervolt
network and simply didn’t show up on the Masteradjust software.
From: Tech Support
USA - Mastervolt [mailto:tsusa@mastervolt.com]
I know that you may have done some of these tests already, but run the test outlined below. When the test is complete, please respond and describe what is going on with the charger.
Turn off AC
power to the combi and let it sit for a minute or two without AC power.
Measure the
battery voltage at the on the DC output of the charger with no AC power to make sure there is no disconnect between the
batteries and the charger. You will need a minimum of 8 volts to turn on the outputs of the charger. Anything less will require you to boost the batteries above 8V.
Remove everything but AC power input-remove all communication
cables, remotes, temp sensors, and DC loads.
Apply AC power to the charger.
Wait a minute for the charger to boot up. If the charger goes into “Bulk” without any fault light present, measure the DC output with a meter at the charger. It should read approx. 14.4VDC.
After 2 min. the charger should go to Absorption, and measure approx. 14.3VDC.
After 12 min, the charger should go to float and measure 13.3DC if set for flooded, and 13.9 if set for
AGM or Gel.
If the charger passed the test above, connect the batteries and turn the charger on. You should see the voltage increase above the voltage measured with the AC power off to the charger.
When the batteries have fully charged, make sure the switch is in the “on” position and turn off AC power to the charger. The combi should switch to inverter. Measure the AC at the short break output.
Let me know what you find.
David Freeman
Technical Service
800.307.6702 direct
800-799-3779 fax