Falanqaynta sababahamotoor AC oo saddex-waji ah oo asynchronous ahgubasho, sababaha saddexda waji ee gubashada AC waxaa loo qaybin karaa culeys, sahay koronto, dahaarka gawaarida, iyo wejiga luminta.
Matoorka AC saddex-waji ah culeyska (overload) gubasho: Matoorku wuxuu ku kululaadaa hawl-qabad xad dhaaf ah. Ama matoorka si joogto ah ayaa loo bilaabo oo aad u kululaadaa. Marka labada daraf ee stator-ku ay ku gubtaan matoorka gudihiisa, qaybaha gubtayna ay noqdaan kuwo lebbis ah (guud ahaan, matoorku waxa uu leeyahay awood hawleed joogto ah, oo loo yaqaan awoodda la qiimeeyay, ee watts (W), iyo xaaladaha qaarkood marka awoodda dhabta ah ee uu isticmaalo matoorku uu ka bato awoodda lagu qiimeeyay matoorka, dhacdadan waxaa loo yaqaan culeyska matoorka. iyo matoorku kuleylku waa mid aad u sarreeya, iyo mishiinka barbecue waa mid gubanaya in marxaladda maqan wareersan Mashiinka barbecue ee culeyska xad dhaafka ah leh, iyo stator sidoo kale wuu gubi doonaa, laakiin waxaa jira calaamado gubasho oo muuqda oo ku yaal qaybta gaaban ee wareegga, sida macdanta naxaasta ah ee dhalaalaysa mararka qaarkood. Qaybta dabaysha ayaa si xun u gubtay. Sababaha loo gubaymatoor AC saddex waji ahwaa: 1. Matoorku wuxuu qaataa habka isku xirka delta, kaliya hal waji oo dabaysha ayaa la gubi karaa, dhaawaca dahaarka ee hal weji oo dhulka ah ayaa lagu qiyaasi karaa megohmmeter. 2. Matoorku wuxuu qaataa habka isku xirka xiddiga (y), waxaana gubtay laba weji oo dabayshu ka mid ah. Dhaawaca dahaarka ee labada weji ee dabaysha dhulka waxa lagu qiyaasi karaa megohmmeter (saacad).