Question about Heating & Cooling
When I try to restart the unit the timer light sharts flashing and the unit will not start. The only way I have found around this is to turn the mains off to the airconditioner, wait ten seconds and turn the mains back on. By doing this I am able to get the unit to work for another couple of days. It only seems to be happening on the cooling cycle, but I am not using the heating cycle much.
SOURCE: Fan runs, shuts down on cool
Sounds like a power supply problem. There is enough power to run the fan but when you turn it to cool the current draw by the compressor drops the voltage. The lower power light is telling you the answer to your problem.
Posted on Jul 18, 2008
SOURCE: I have a Carrier Weathermaker
Emergency heat is made for this kind of situation.So yes you can.
now for the codes.
code 12= Blower on after power up
code 31=High heat pressure switch or relay didn't close or reopened
code 32=Low heat pressure switch or relay didn't close or reopened
code 33=limit circuit fault(Flame rollout switch is open)
code 41=board fault
code 42=control lockout
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Posted on Jan 17, 2009
My unit is giving me the same alarm. If you have found the solution, please email me at email@example.com
Thank you very much.
Posted on May 10, 2009
I have same problem like yours to my newly installed Fujitsu multi-split system (the first time use since system installed 1 week ago). I rang the electrician who did the installation; he said it must be the units themselves nothing to do with electricity.
Okay, then I rang Fujitsu and their local service agent. They suggested me to switch off C/B for an hour to reset the units. I followed the instruction but the indoor units still did not respond to remote control...
It simply looks like no power supply to indoor units (they are hard-wired to the outdoor unit). So I used a multi-meter to test the power terminals of indoor units (Danger! If you have no idea about this, don't even try! ): it seemed no power supply even C/B is on. I turned to the isolator which next to the outdoor unit. The isolator was making arcing noise when I switched it on and off. The indoor units suddenly turned on for few minutes then died again.
So I figured out the problem is that crooked isolator. I called the unhappy electrician to replace the isolator. End story....
I hope my experience will help you a little bit.
Posted on Nov 23, 2010
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