Samsung AM032MNQDCH/AA Service Manual page 303

4-4-60 EVI EEV Open error
Outdoor unit display
Indoorunit display -
Judgment Method . DSH <10 °C, EVI Out-in <= 0°C & frequency> 65Hz 40 minutes maintaining
. EVI EEV and Intercooler leakage, excessive refrigerant amount, Outdoor Check Valve inserted opposite.
Cause of problem
. Indoor Unit EEV leakage, direct connection between Indoor Liquid Pipe and the Gas Pipe.
Indoor EEV leakage can be easily checked during the operation of cooling operation and during the not-go-end blast operation.
(In case it is normal, the EVA In and Out temperatures for the blast may rise.)
If cooling operation is operated for low temperature with excessive refrigerant amount, then the DSH may descend.
1. Cause of problem
Is EVI EEV connector accurately connected to PCB?
Is EEV coil accurately installed?
Check the EVI EEV leakage.
Check the Intercooler leakage.
Check the Indoor Unit EEV leakage
Check the connection for Indoor Unit Pipe
(Connect liquid pipe-gas pipe directly)
Samsung Electronics
Yes
Yes
Yes
Normal
Normal
Check the refrigerant
No
Reconnect connector
No
Reassemble coil
No
Replace EVI EEV
Breakdown
Replace Intercooler
Breakdown
Replace Indoor Unit EEV
Reinstall pipe
Troubleshooting
4-103