Troubleshooting
12-57Samsung Electronics
■
(for 1
st
Detection) Indoor Unit EV Close Error
1. Judgment Method
1)
Cooling operation (The below conditions should be satisfied for over 20 minutes.)
2)
Heating operation (The below conditions must be satisfied all.)
- When more than 2 indoor units are operated under Thermo On heating operation
- When the high pressure average value is over 18 kg/cm
2
G
- When 5 minutes is passed after completion of Safety Start
- When T(EVAP_IN) < T(Room) + 3°C and T(EVAP_OUT) < T(Room) + 3°C condition for indoor unit maintains for over
5 minutes
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 (electric valve is not opened)
OK
NO
NO
OK
Indoor heat exchanger EVAP IN sensor breakaway
Tcond, out > Tair, out > 3°C
Tair, in > Teva, in > 4°C
Tair, in > Teva, out > 4°C
Compressor running &
indoor unit on and thermo on
Error contents
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