Samsung AVMKH020EA0 Service Manual page 270

8-2-88. The 1 , 2 error of indoor EEV closing
st nd
Outdoor unit display
Indoor unit display
Judgment method
Causes
✳ Only for H Type outdoor unit
1. Judgment method(Start the detection 5 minutes after the completion of safe start.
Every condition below should be satisfied 20 minutes over.)
1) In cooling mode (Every condition below should be satisfied 20 minutes over.)
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
2) In main cooling mode (Every condition below should be satisfied 20 minutes over.)
Tcond, out - Tair, out ≥ 2°C
Tair, in - Teva, in ≥ 4°C
Tair, in - Teva, out ≥ 4°C
Compressor running &
indoor unit on and thermo on
Liquid Bypass switches ON because of the raise of
compressor discharge temperature.
T > 50˚C
MCU Temp.
Teva, in - Tair, in ≥ 3˚C
Teva, out - Tair, in ≥ 2˚C
Average of high pressure > 15kg/cm
Average of low pressure < 5kg/cm
3) In heating mode (Every condition below should be satisfied 20 minutes over.)
1 detection :
st
2 detection :
nd
(Operation) (Timer) (Fan)
- Refer to the below judge method
- Indoor unit EEV operation defect (EEV does not open.)
2
2
Detection condition
More than 2 indoor unit's are thermo on running for heating mode.
The average value of high pressure is 18kg/cm
Indoor unit T (EVA_IN) < T(room) +3˚C
T (EVA_out) < T(room) +3˚C
- 269 -
(Filter) (Removing frost)
OK
NO
NO
OK
Cooling Indoor unit
OK
NO
NO
OK
OK
over.
2
Troubleshooting
Heating Indoor unit
OK
OK
OK
Not related
NO
NO
OK
OK