Samsung AVXC1H022 series Service Manual page 265

Troubleshooting
I
( for 1
Outdoor unit display
Indoor unit display
Judgment method
Causes
1. Judgment Method
Cooling operation (The below conditions should be satisfied for over 20 minutes.)
1)
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
Heating operation (The below conditions must be satisfied all.)
2)
- When more than 2 indoor units are operated under Thermo On heating operation
- When the high pressure average value is over 18 kg/cm
- 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
Check whether the EEV wire is connected to the indoor unit PCB correctly.
1)
Check whether the EEV coil is inserted into the body correctly.
2)
Check with the naked eye whether rust is generated on the outside of the EEV coil, the resistance between each
3)
terminal of coils, and the open and short on the coil inside.
After pressing the outdoor unit Reset Key (K3), check that same error is occurred.
4)
- 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.
If no error is checked for the above check points, replace the relevant indoor unit EEV.
5)
- The replacement of EEV is inconvenient because it collects all refrigerant of the system; thus,
before replacing it, must check the above points.
9-21
Detection) Indoor Unit EV Close Error
st
1 st detection :
2 nd detection:
(Operation)
Refer to the below judgment method
Indoor unit EEV moving defect (electric valve is not opened)
(Display only outdoor unit)
↔ A*** (*** : Indoor unit address which an error is occurred)
(Timer) (Fan) (Filter)
Indoor heat exchanger EVAP IN sensor breakaway
2 G
(Defrost)
OK
NO
NO
OK
Samsung Electronics