SAMSUNG Inverter Errorcode E4

[The Viking]

Hmm,

It's worse than that I'm afraid.

On modern (inverter driven) splits, pressure readings (on their own) are pretty much useless.

The system will not only speed the compressor up or down in order to maintain the pressures, it will also open or close various bypass valves and EEV(s).

Unfortunately the only Samsung error codes I managed to find refers to other model #s.
But there seems to be a trend of E4 meaning high discharge temperature or pressure.

So, some questions
-Are you confident this system were installed using good engineering practices?
-Is there any LEDs flashing on the front of the indoor unit when the fault happens?
-Is the system running at all?
-Why do you think that the system needs more refrigerant?

Normally in cases like this your best option is to reclaim the system, pull a deep vacuum on it and then recharge it with fresh refrigerant by weight as per the manufacturer's recommendations.


Good luck and don't forget to let us know how you get on with it.