Samsung AVMKH020EA0 Service Manual page 231

8
Troubleshooting
8-2-48. The 1 , 2 simultaneous opening error of MCU SOL V/V heating & cooling
st nd
Outdoor unit display
Indoor unit display
Judgment method
Causes
1. Judge method
1) It is detected only in main cooling/main heating/heating mode. (Not detected in cooling mode.)
2) All conditions of below shall be satisfied 5 minutes over.
1 detection : ( )
st
2 detection : ( )
nd
(Operation) (Filter)
- Refer to the below judge method
- The rising water level of drain plate due to the defect of drain pump of indoor unit or
Detection condition
T_MCU > 50[˚C]
T_suction ≥ 40˚C
The low pressure of outdoor unit shall be 10kg/cm
- 230 -
2 G over.