E438
Event:
• EEV opening/closing error.
• EEV is leaking an excessive amount of refrigerant. Check the outdoor EVI value.
Outdoor unit display: E438
Indoor unit EEV is leaking (the EVA In and EVA Out temperatures for the fan mode may rise). Set
the indoor unit fan and cooling operations of the indoor unit, and then check again. If cooling
operation has a low temperature with excessive refrigerant amount, then the DSH may descend.
• Operate cooling in one room for any of the selected indoor units. The rest of the indoor units
can be confirmed at the fan operation.
• The EVA in/out temperature of indoor unit that is on fan operation within 5 minutes
approaches the indoor temperature
As Per Samsung Engineering S. Korea for the Indoor unit to be a suspect below :
one of reason to occur E438 is indoor internal leak
if EEV valve has scratch by foreign material, it may leak internally when indoor was stop and according to another indoor operation
this liquid status gas affect to cycle condition and it has condition to occur E438
that's why indoor operation also affect to E438 even though E438 has outdoor error.
See Attachment