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CS /CU-903KR.. had a series of power blackouts and the air con was on. In the morning turned it off but the exterior box was still running (without us knowing) and both the interior and exterior froze... now when turned on at the wall (with out operating the interior air con, the exterior one starts up... how do we fix this?
Re: CS /CU-903KR.. had a series of power blackouts and...
Power straight a way to out door unit through jammed /struck contactor . When you start power on,power not going to out door by transmission of indoor thermostat calling.
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HI Duncan,
Error Code F42 means the Outdoor unit P.C. B (NOISE FILTER) is faulty or connector ACN2
Enclosed is a link to 2 service manuals that may be helpful you.
Good luck,
JP
Try turning the unit off at thye meter box or the isolator switch out next to the outdoor unit of the air con. Leave off for 15 minutes and then switch back on again. Some Air cons get screwed up with power surges... Leaving off at the mains for a while often resets them. If the air con was running at the time the power went off, it may have damaged one of the electronic boards... Do you get any flashing lights or displays showing what could be an error code ??
Turn off your breakers and then back on. There are fuses located in the a/c control panel. Check them. If you aren't getting any power still, a board may have been blown during the storm.
First turn off all the power inside and out then back on and change your batteries in the remote. And look on the remote for an extra switch that may have been moved during the outage and you don't ordinarily see it. If neither of these solutions work its most likely a service call. to tell you more.
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