Samsung mini DVM Series, Service Manual

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Troubleshooting
12-25 Samsung Electronics
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( for 1st Detection) : Indoor Unit EV Open Error
1. Judgment Method
Detect only during cooling operation (Not detect during heating operation)
When the inlet or outlet temperature of the indoor heat exchanger on the stop side during cooling operation maintains for
over 20 minutes at below 0˚C.
2. Check Method
1)
Check whether the EEV wire is connected to the indoor unit PCB correctly.
2) Check whether the EEV coil is inserted into the body correctly.
3)
Check with the naked eye whether rust is generated on the outside of the EEV coil, the resistance between each
terminal of coils, and the open and short on the coil inside.
4) After pressing the outdoor unit Reset Key (K3), check that same error is occurred.
- In case close error, do not operate the indoor unit that the error is occurred.
- In case open error, do not operate the indoor unit that the error is occurred.
5) If no error is checked for the above check points, replace the relevant indoor unit EEV.
- The replacement of EEV is inconvenient because it collects all refrigerant of the system; thus, before replacing it,
must check the above points.
Outdoor unit display
1 st detection : (Display only outdoor unit)
2 nd detection:
↔
A*** (*** : Indoor unit address which an error is occurred)
Indoor unit display (Operation) (Timer) (Fan) (Filter) (Defrost)
Judgment method Refer to the below judgment method
Causes Indoor unit EV moving defect (refrigerant is leaked to the stopped indoor unit)