Samsung Heat Pump Error Code P503

Where this code is documented

2 manuals in the MyPros+ library document this code for Samsung heat pump.

Models covered by the manuals that document this code

• AVMWH020CA0G
• RMAH140GAM0SER

• AxIndoor unit EVAP IN sensor breakaway error (x = indoor unit…
• BxElectronic expansion valve open error (x = indoor unit…
• ChCompressor preheating in progress
• CxElectronic expansion valve open error for xth indoor unit
• DxOPEN/SHORT error of EVAP IN sensor in indoor unit (x =…
• E1System down due to communication error after completion of…
• E101Communication error between the indoor unit and the wired…
• E102Compressor down by high pressure protection control