My airconditioner keeps shutting off and puts E-4 on my thermastatcan you tell what to do

1 ANSWERS

1. Guest843
   

   If unit displays "e4"
   
   1、 Check whether the winding resistance and
   operation current of the compressor are normal.
   2、Check whether the high and low pressure is normal
   when the unit is running.
   3、Check (whether the coil pipe sensor is normal)
   whether the contact of the inserter on the circuit
   board is well, the coil pipe temperature sensor is
   fixed, the evaporation of the indoor unit is well,
   the key is to check the evaporator temperature
   detected by the coil pipe temperature sensor has
   reached the cooling or heating temperature.
   4、Check whether the surface of the condenser is too
   dirty, it should be cleaned when it is too dirty.
   5、Check whether the capacitance of the outdoor motor
   and the fan is damaged, it should be replaced when
   it is damaged.
   6、If the above items are normal, the electric control
   board should be replaced.

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