Samsung AM280KXVAGH/EU - E428: Suspension of Starting by Abnormal Compression Ratio

Troubleshooting
Samsung Electronics 4-55
4-3-35 : Suspension of starting by abnormal compression ratio
1.
Cause of pr oblem
Complete
Check the 4Way Valve
Replace defective sensor
No
No
Yes
Yes
Are the 4Way Valve normally operating?
Is the S-net estimated value
and the Manifold Gauge value in range?
Check the relevant EEV
No
No
Are the Indoor Unit and Outdoor Unit EEV
normally operating?
Compressor Inspection
Check the refrigerant
No
Yes
Is current of compressor normally?
Auto Trial Operation
Replace defective sensor
Outdoor unit
display
Indoorunit
display
Duct, Cassette (1/2 Way),Console, Celing Cassette (4/Mini4 Way) Wall-mount ed (NeoForte)
Operation Defr ost Timer Fan Filter/MPI Operation Defrost Timer F ilter Operation Timer Turbo
××◑◑◑ ×◑◑◑ ● ◑◑
※ ●: ON ◑: Flash ×: OFF
Judgment
Method
 Compression ratio [(High pressure+1.03)/(Low pressure+1.03)] less than 1.5 and lasts for 10 minutes or more
 Differential pressure (high pressure - low pressure) less than 0.4 MPa.g and lasts for 10 minutes or more
Cause of
problem
 Indoor and Outdoor EEV breakdown
 4Way Valve breakdo wn
 High and Low pressure sensor defective
 Refrigerant shortage