Samsung Electronics
250
Piping Diagram
High Pressure Protection
▪
Purpose
Prevent abnormal high pressure to protect the system and compressors.
▪
Concept
The compressor operation frequency is lowered to decrease the high pressure.
▪
Control specifications in detail
- The compressor operation frequency is controlled according to the high pressure, as shown below.
1st step Hz hold: The current frequency is fixed. (It is possible to lower the frequency if necessary)
2nd step Hz down: The frequency is forcibly lowered by 5Hz at specified intervals.
3rd step HP down: The frequency is forcibly lowered by 1Hz every second.
4th step Comp trip: Compressors stop and an error is triggered (E407).
Compressor Trip (E407)
※
High Pressure < 30 k gf /cm
2
,g : Compressor Trip release
Hz Hold area
Hz Down area
HP Down area
Normal operation
Hz Hold release
Hz D own release
HP Down release
Compressor Trip (E407)
※
High Pressure < 30 k gf /cm
2
,g : Compressor Trip release
Hz Hold area
Hz Down area
HP Down area
Normal operation
Hz Hold release
Hz D own release
HP Down release
※
T.HP = Target Hig h Pressure
36
37
38
40
Hi
gh
P
re
ss
ure
(k
gf
/c
m
2
,g
)
32
& (T.HP + 4)
40
Hi
gh
P
re
ss
ure
(k
gf
/c
m
2
,g
)
30
& (T.HP + 3)
28
& (T.HP + 1.5)
Cooling
Heating
7-3 Functions (cont.)
7-3-2-5 Protective control
7-3-2 Control (cont.)
Содержание AM072BXV Series
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Страница 162: ...Samsung Electronics 156 Troubleshooting 4 4 3 Pump out operation cont 4 4 Case study for trouble shoots cont...
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Страница 192: ...PBA Diagram and Parts List Samsung Electronics 186 5 9 PF8 Inv Integration F POWER 1 2 3 4 5 6 11 10 9 12 1 7 8...
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