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Old 03-21-2020, 03:52 PM   #1
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Las Cruces , NEW MEXICO
Join Date: Mar 2020
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Magnum mm1212 problems

Having some trouble with my MM1212 inverter. First one fan froze up after 6 years, causing the unit to over heat... we both know in no good. Noticed it because the inverter was clicking on for a brief period of time then off and the batteries we no longer getting charged. Had a spare mm 1212 that I had ordered approx 2 years before (that's another story). Put the spare in and it worked for a month then gave off an internal fault condition. Took the control board off the old one and plugged it into the new on and it did the charge for 30 seconds than switched off. Same fault as the old inverter... So i figured the control board must be bad on both... ordered a control board and replaced it... gave the same internal fault signal. Any thoughts???
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