Question about Heating & Cooling
Posted by Anonymous on
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Posted on Jan 02, 2017
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.
The only thing you would be able to check yourself is the discharge temperature after the unit been running for 20 minutes.
Remove the covers so you are able to see the compressor, start the unit and wait for 20 minutes then measure the temperature of the smaller pipe connected to the compressor.
If it's above ~90 Degrees Celcius, call in a professional. You may need a charge of coolant or a compressor issue, at the very least a bad capacitor on the motor
Posted on Feb 04, 2011
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