Troubleshooting
Samsung Electronics 4-103
4-4-59 : Comp. Down by Compression Ratio Control
1.
Cause of problem
Yes
Are the 4Way Valve normally
operating?
Are the Indoor Unit and Outdoor
Unit EEV normally operating?
Is current of compressor normally?
Complete
Commissioning
Replace defective sensor
Check the 4Way Valve
Check
the relevant EEV
Compressor Inspection
Check the refrigerant
Yes
Yes
No
Is the S-net estimated value and the
Manifold Gauge value in range?
Connect S-net and Manifold Gauge.
(essential requirement)
No
No
No
No
Outdoor unit display
Indoorunit display
×(Operation) ስ (Reservation) ስ (Blast) ስ (Filter) ×(Defrost)
Judgment Method
When compression ratio (high pressure+1)/(low pressure+1) less than 1.5 and lasts for 10 minutes or more
Differential pressure (high pr essure - low pr essure) less than 0.4 MPa.g and lasts for 10 minutes or m
ore
Cause of problem
Indoor and Outdoor EEV breakdown
4Way Valve breakdown
High and Low pressure sensor defective
Refri gerant shortage
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