![]() How to Diagnose Hitachi AC Incorrect Temperature Settings (Cooling Mode) Once the room temperature changes, the mode of operation changes automatically.Īs such, if your Hitachi AC is set to the HEAT or DEHUMIDIFY mode, it’s not going to be cooling your house. When the AUTO mode is used, the thermostat automatically adjusts the mode of operation between HEAT, COOL, and DEHUMIDIFY depending on the room temperature. The COOL mode on your Hitachi AC should be used when the outdoor temperature is between 21☌ (69.8☏) and 43☌ (109.4☏). Your Hitachi AC has operation modes that go from AUTO to HEAT to DEHUMIDIFY to COOL and FAN every time you press the mode button on the remote control.ĭuring the cooling season, you can work with the COOL or AUTO modes. You should clean your air filters regularly, as dirty filters are the most common cause of a lack of cooling in your Hitachi AC unit. If your Hitachi air conditioner is not cooling or blowing cold air, it may have the wrong temperature settings, the air filter or outdoor unit might be dirty, the thermostat might be detecting secondary heat, or the doors and windows might be letting out cold air and letting in hot air. I am just sharing that it is working but I cannot guarantee there is no problems.Author Hitachi Air Conditioner Not Cooling/Not Blowing Cold Air If you think I could share this text in a way ppl will understand the risks better, say so or edit it please. I do not recommend doing it w/o someone that understand the electronics of the model of your specific air conditioner, ask a technician to help you tweak the hardware, and to give you warranty in case some problem happens, that would be the most safe way for sure. totally out of real despair, because of the absurdly irritating noise, I should never have bought that model initially at all!!! (and will never buy again w/o being sure it is possible to disable the noises w/o risking damaging it). I risked myself damaging the air conditioner. If you want to try this, talk to some friend that understand electronics first, and better ask him to manipulate the buzzer so that you wont damage it, and if possible ask him to test if the circuit could be failing somehow so he can solder it (or something else less irritating, may be a led?) back if something looks wrong. I am just sharing what happened and is apparently working w/o problems, but I do not understand electronics myself so I cannot explain if it is or is not causing problems!!!Īlso, the buzzer is used to provide diagnostic data thru a cell phone call by making noises like a fax I guess, so that functionality became unavailable until I plug the buzzer back again. This doesn't mean there is no problem there!!! for that model it is not causing any trouble that I can detect to the date. I've been using the air conditioner w/o noises since then. to my surprise, the buzzer came out completely and cleanly w/o damaging the circuit board (probably it was weakly soldered), by luck I guess. He said that removing the buzzer completely could not cause any problems.īut before trying that drastic solution, first I tried just to remove the buzzer cover to try to put something inside the buzzer to lower the noise.īut then. I talked to a friend that understand electronics. ![]() Cut or damage the utterly annoying beeper can cause other problems on the circuit board?. ![]() Where can I find such maintenance manual?.The beep is so horrible that I avoid using it as much I can. I know if I make a hole on it somewhere I will be able to reach the beeper and cut it out or block it enough to lower the beep volume in a hardware way.īut I can't find a maintenance manual for it, so I don't know where to cut. I don't want that noise to cause trouble with my neighbors. The noise is very annoying, mostly in the morning, and mostly because I live in an apartment. I contacted the manufacturer and they say "it is how it works and is impossible to disable the beep". The problem is there is no way to disable the beep that happens every time we press a button in the remote control. ![]() I bought this model: MFL69782201 (User manual PDF ) ![]()
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