good morning all I have the following drawback: I called customer to see the air because it does not work: the sequence that does is the following: I plug in and power up indicates the power to the plate by means of the buzzer (a long beep is heard) I put on cold and I expect the MC relay is heard and the external FAN is turned on, not the internal FAN. Disposal of ambient sensor. I focus more on following the fault for the internal fan (turbine) I check turbine engine: I turn it by hand, at first glance it is observed that it is in good condition. it has no dirt or grease. I remove the plate by disconnecting all the pieces and I take it to the workshop in workshop the alilmento with trafo 12V connect sensors and the digital command panel when energizing it sounds and gives the normal beep I turn it on by remote control re-mark the same error. this error gives it 3 seconds after it turns on the MC relay and external FAN. in the digital one puts E4 and cuts everything. only does not do it when I put ventilation mode control motor capacitor 1.5uF turbine and gives me 1.42uF to my understanding is fine and I discard it. I understand that although I try the plate without connecting the motor of the fan inside should not give me the error, so the fault is in some component of the plate that does not allow to follow the sequence of ignition and cuts it. for now I'm still looking for the fault. the plate with the naked eye does not show any malfunction.

Hello if in ventilation mode it works is not turbine engine failure. Check both sensors to see which values ​​tell you. He says.

is solved was the thermal fuse of the winding of the turbine engine. directly change the engine because I can not replace that feature. and also this engine runs constantly when you start the computer, I do not want the customer to call me back because it failed again. solved. thank you very much!