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Thread: old mitsubishi 12 rv a2
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30-05-2013, 06:35 AM #1
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old mitsubishi 12 rv a2
having some problems with this unit, i have been told the voltage across terminal 1 and neutral should be around 9>12 volts d/c. when i checked i found had 20>22d/c. was told by tech support to replace faulty indoor board. Installed new board still the same. i get 240 volts on terminal 2 (supply to outdoor) for a few seconds then unit faults. the green lights just flash.
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30-05-2013, 07:50 PM #2
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Re: old mitsubishi 12 rv a2
is the transformer external from the board? if so check outputs- as you say its a 12v dc signal on 1,2 for cooling,and 3 energises reversing valve
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30-05-2013, 08:31 PM #3
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Re: old mitsubishi 12 rv a2
https://www.google.co.uk/url?sa=t&rc...SjoqxsMDy62Law
service manual
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02-06-2013, 05:52 AM #4
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Re: old mitsubishi 12 rv a2
the transformer is built into the board, cant see the voltage on the transformer. the compressor relay on the board (indoor) has 12volts d/c coil. could there been something causing the higher voltage?
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02-06-2013, 07:41 AM #5
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Re: old mitsubishi 12 rv a2
is the 12v transmission cable run parallel with any mains cable
