Samsung DVM S ECO BIG Series Service Manual page 89

■ Phase reversal or phase failure(3Ø outdoor unit wiring, R-S-T-N),
connection error on 3 phase input. (E-428) (cont.)
Outdoor unit Display
Indoor unit Display
Judgement Method
Cause of problem
Samsung Electronics
Duct, Cassette (1 / 2Way), Console, Ceiling
Operation
×
Cassette (4Way / Mini 4Way)
Operation
×
Duct, Cassette (1/2 Way), Console, Ceiling
Operation
×
• 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
• Indoor and Outdoor EEV breakdown
• 4Way Valve breakdown
• High and Low pressure sensor defective
• Refrigerant shortage
E-428
Defrost Timer
◑
×
Defrost Timer
◑
◑
Timer Turbo
◑
×
※ ● ◑
: ON : Flash ×: OFF
Troubleshooting
Fan Filter / MPI
◑
◑
Filter
◑
24°C 27°C
◑ ◑
4-47