Samsung AVMKH020EA0 Service Manual page 261

8
Troubleshooting
8-2-79. The low pressure detection error at the initial of compressor start
Outdoor unit display
Indoor unit display
Judgment method
Causes
I Check method
I
1. Measure he pressure at the state of system stopping with manifold gauge.
I
2. Check the value of low pressure sensor with view mode or S-net.
I
3. If the value of 1 and 2 are similar, most of refrigerant must be leaked. Discharge the rest refrigerant,
and vacuum and charge again.
I
4. If the difference between value 1 and 2 is large, it must be a connection defect of connecter or sensor
defect. Check and replace it.
(Operation) (Timer)
- If the value of low sensor before the pump down start is lower than the compressor down pressure,
- prohibit the start.(In cooling 0.7kg/cm
- Leakage of refrigerant/Low pressure sensor error
- 260 -
(Fan) (Filter) (Removing frost)
2 , in heating 0.2kg/cm 2 )