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Old 04-17-2016, 05:28 PM   #1
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Help with charger/inverter

Plugged in at my daughters home before leaving on a 3 week trip and I get a Fault message followed by No Comm. I believe I am not charging the batteries with Shore power. I tried turning off the inverter/charger but reverts back to the error message . . . . . . HELP!
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Old 04-17-2016, 05:30 PM   #2
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Plugged in at my daughters home before leaving on a 3 week trip and I get a Fault message followed by No Comm. I believe I am not charging the batteries with Shore power. I tried turning off the inverter/charger but reverts back to the error message . . . . . . HELP!
What is your battery voltage? Too low will give you that fault.
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Old 04-17-2016, 05:37 PM   #3
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Old 04-17-2016, 07:51 PM   #4
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Try a hard reset. Remove all AC and DC power from the inverter along with removing the monitor cable and the BTS.

Wait 15 minutes and reconnect. See if that clears the fault.


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Old 04-17-2016, 08:56 PM   #5
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From the ME-MR Manual:
No Comm - Remote is not receiving any information from the inverter.
Remedy: Reset the remote by disconnecting the remote commu- nications cable from the inverter for 5 seconds, and then recon- nect it (see Figure 2-3). If the fault continues, first check/replace the remote cable. This cable is 4-wire telephone cable.
What if the cable is not the issue?
Try another remote display.
Disconnect the remote from the Remote port and connect to the Net-
work port.
The inverter might need servicing.
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Old 04-17-2016, 09:43 PM   #6
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Most of the 'no comm' faults that I hear of involving the Magnums are limited to the MMS-1012 using the ME-MR remote. I have never seen this fault with the ME-RC full-function remote. (I am a factory authorized Magnum service center)

If the unit was functioning well prior to the fault, its is highly unlikely that you have a cable problem. Much higher probability of a malfunction in the ME-MR remote.
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Old 04-17-2016, 10:05 PM   #7
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This site is amazing. I powered down for 15 minutes and disconnected the comm cable from the display. Back in business. Saved a full freezer of food and an out of the way trip to the Airstream dealer.

Thanks again!
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Old 04-17-2016, 10:24 PM   #8
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this site is amazing. I powered down for 15 minutes and disconnected the comm cable from the display. Back in business. Saved a full freezer of food and an out of the way trip to the airstream dealer.

Thanks again!
good job!!!!
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Old 04-18-2016, 06:06 AM   #9
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I"m sitting at my desk with no access currently to the van. How do you disconnect the cable from the display? do you unscrew the display and pull it out of the panel or something? (for future reference) THX
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Old 04-18-2016, 06:56 AM   #10
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I"m sitting at my desk with no access currently to the van. How do you disconnect the cable from the display? do you unscrew the display and pull it out of the panel or something? (for future reference) THX
Depends on where your Magnum is located. If it's under the rear lounge, then you can reach in and disconnect the RJ-11 plug (phone style) from the inverter. If it's a newer model with the Magnum under the driver side jump seat, remove the ME-MR remote and disconnect there.

A 'hard' reset involves removing the positive battery cable also, which is a bit more invasive. I provide a 300 amp marine switch in my installations for this pour pose, but Airstream does not.

A 'soft' reset involves simply depressing the little grey button on the Magnum above the green LED and holding it in until the LED start to flicker. This will also clear some minor faults.
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Old 04-18-2016, 09:50 PM   #11
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Thanks
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Old 04-24-2016, 07:22 PM   #12
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Is the MR-RC a direct replacement for the ME-MR remote?

Can one buy the new remote and just plug it into the same cable?

Thanks!

Bob

Quote:
Originally Posted by lewster View Post
Most of the 'no comm' faults that I hear of involving the Magnums are limited to the MMS-1012 using the ME-MR remote. I have never seen this fault with the ME-RC full-function remote. (I am a factory authorized Magnum service center)

If the unit was functioning well prior to the fault, its is highly unlikely that you have a cable problem. Much higher probability of a malfunction in the ME-MR remote.
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Old 04-24-2016, 08:14 PM   #13
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Is the MR-RC a direct replacement for the ME-MR remote?

Can one buy the new remote and just plug it into the same cable?

Thanks!

Bob
The ME-RC IS a plug-in replacement but it needs a larger opening for flush panel mounting. If you wish to avoid this type of panel modification, Magnum also has a matching black plastic surface mount box that lets you mount the ME-RC to amy surface that has the available space. It's the ME-RC-BZ.
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Old 04-24-2016, 09:16 PM   #14
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Excellent. Where is your business located again?
Bob

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Originally Posted by lewster View Post
The ME-RC IS a plug-in replacement but it needs a larger opening for flush panel mounting. If you wish to avoid this type of panel modification, Magnum also has a matching black plastic surface mount box that lets you mount the ME-RC to amy surface that has the available space. It's the ME-RC-BZ.
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