Samsung AVMKH020EA0 Service Manual page 269

8
Troubleshooting
8-2-87. Indoor unit EEV CLOSE error
Outdoor unit display
Indoor unit display
Judgment method
Causes
1. Judge method (The following conditions should be satisfied for more than 20 minutes.)
1) In cooling mode
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
2) In heating mode (All following conditions should be satisfied)
2) (1) More than 2 indoor units are operating in THERMO ON heating mode.
(2) The average of high pressure ≥18kg/cm
2)
2) (3) After 5 minutes from the completion of safety start, the condition of indoor unit T(EVAP_in) < T(Room) + 3˚C and
T(EVAP_out) < T(Room) + 3˚C is maintained for 5 minutes.
2. Check method
1) Check whether the EEV wire is connected correctly to the indoor unit PCB.
2) Check whether the EEV coil is inserted to the main body correctly.
3) After pressing the reset key(K3) of outdoor unit, check if the same error is occurred.
G If it is the CLOSE error, operate the corresponding indoor unit.
3)
G If it is OPEN error, turn the power of corresponding indoor unit off to check.
3)
4) If there is no trouble for the above checks, replace the EEV of the corresponding indoor unit.
G Since the replacement of EEV is the inconvenient work to collect the all refrigerant in the system, be sure to check
3)
the above items before replacing EEV.
1 detection : (Displayed only outdoor unit)
st
2 detection : x x x (x x x : Indoor unit address occurred error)
nd
(Operation) (Timer)
- Refer to the below judge method
- Indoor unit EEV operation defect (EEV does not open.)
2 g
- 268 -
(Fan) (Filter) (Removing frost)
Department error of indoor unit EVAP IN sensor
OK
NO
NO
OK