Piping Diagram
Samsung Electronics 251
Low Pressure Protection
▪ Purpose
▪ Concept
▪ Control specifications in detail
- Control of the operation frequency (see the chart in the previous page for pressure conditions.)
℃ .
℃ .
℃ .
4th step Comp trip : If in critical state for 3 min, stop the compressors and trigger an error (E410).
- Control of the Hot Gas Bypass Valve
- Others
-
sure protective control.
When cooling mode is on and the ambient temperature is 15℃
Normal Operation
HP Down area
Hz Down area
Hz Hold area
HP Down release
Hz D own release
Hz Hold release
Low Pressure (kgf/cm
2
,g)
1.8
2.6
3.5
4.0
Cooling
Compressor trip (E410) after staying
in this phase for a max of 3 min
※ Ta = Ambient Temperature
Normal Operation
HP Down area
Hz Down area
Hz Hold area
HP Down release
Hz D own release
Hz Hold release
Low Pressure (kgf/cm
2
,g)
0.5
Ta -10℃,
0.7
-10℃ < Ta 0℃,
1.2
0℃ < Ta ,
1.4
Ta -10℃,
1.0
-10℃ < Ta 0℃,
1.6
0℃ < Ta ,
2.2
Ta -10℃,
1.2
-10℃ < Ta 0℃,
2.0
0℃ < Ta ,
3.0
※ Compressor Trip release : Low Pressure >3 kgf/cm
2
,g for 3 min
Heating
Compressor trip (E410) after staying
in this phase for a max of 3 min
7-3 Functions (cont.)
7-3-2-5 Protective control (cont.)
7-3-2 Control (cont.)
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