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24-04-2013, 07:17 PM #8
Re: all reefer container problems/daikin/carrier/thermoking/mitsubishi
KA9 and KA10 are two separate 18vac power supplies for the ML3 controller which should be referenced against KA12 (Ground). So 33v seems to be around normal if measured across both and the control transformer would seem to be working. Are both evaporator fans working as there is an Internal protector (IP-EM1 and IP-EM2) which are embedded into the motor windings. A shorted evaporator motor can back feed 380v back into the controller through the IP lines usually this is instant once a motor burns out but may take a little longer depending on the severity of the burn out.
The programming language for the Carrier microprocessors is properietary
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