If you have a mini split that gives an E1 error code there is a few things to check before calling an HVAC company.
Several things can cause an E1 error code on a mini split and of course the error can be manufacture specific.
The most common fix is to turn the unit off at the breaker for 2-5 minutes resetting both indoor and outdoor condensers.
Steps To Fix a Mini Split E1 Error Code
- Power Off the Unit
- Turn Power Off at the Breaker for 2-5 minutes Resetting the Unit
- Turn the power On and see if the error goes away
Resetting the whole system is the first step and often solves the problem.
If the error comes back below is more things that can be checked before calling a HVAC tech.
Causes of E1 Error Code
- Dirty Air Filter
- Loose Wiring Connections
- Communication problem between the indoor and outdoor units
- Bad PCB Board
Many units will give an E1 code to remind a home owner to clean the filter.
The filter is located in the inside unit usually under the door or on the very top.
They can be removed and cleaned with water.
After cleaning the filter install it back into the unit and reset it again to see if the error code clears.
Loose Wiring Connections
Sometimes a wire can become loose causing a bad signal and with the power off checked.
Both the inside and outdoor units plugs can be checked to see if any wires have become loose.
Often a loose connection wont be visible and need each plug pushed on to check.
Communication problem between the indoor and outdoor units
The inside and outside units have a 4-8 wire communication line that goes between the two units.
The communication line and voltage lines can be checked to be sure they have a good connection.
Be sure the power is off before opening the panels.