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Midea R410A Direct Heating Commercial Heat Pump 50Hz Technical Manual MCAC-HTSM-201506
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1.4.4 Wire connection
There are two methods to connection between wired controller and main unit.
1.4.5 Back cover installation
Use straight head screwdriver to insert into the buckling position in the bottom of wired
controller, and spin the screwdriver to take down the back cover. Pay attention to
spinning direction, otherwise will damage the back cover.