Samsung AM FXVAF Series Installation Manual page 100

Inspection and trial operation
Measure to take when E503 error occurs
Has the correct amount of additional
indoor unit and liquid line?
Perform Trial Operation (cooling/heating)
- See the instructions on Key operation modes.
pressure sensors operating properly?
Is the operation cycle normal?
Perform Auto Trial Operation again
100
opened?
Yes
Yes
Yes
Yes
Yes
No.
Take corrective measures.
No.
Take corrective measures.
No.
Take corrective measures.
No.
Take corrective measures.