Check the power switch is normal. Checks to the two at the high frequency filter coil, carefully found one end coil disconnection, connected to the power supply, welding well off the end of the boot remote found the start outdoor, indoor machine put wind plate is normal, but the fan does not rotate, indoor machine running lamp keeps flashing, inspection found no fault of indoor machine motor. Remove the indoor machine PCB inspection found R101 (7.5 Ω / 5 w), Q101 (C4300) is damaged, then check the bridge pile BD102, 12 v relay, C105 filter capacitance, found no damage components such as replacement of R101 and Q101 after boot, indoor machine normal rotation.4mkservice manual download site