LG ARNU Series - 3 Protection Control; Pressure Protection Control

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Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Function
3.1 Pressure protection control
3.1.1 Pressure control on cooling mode
■ High pressure control
■ Low pressure control
3. Protection control
StopStopPd ≥ 3676 kPa
OffNormal control
Pd < 3284 kPa
Normal controlFrequency holdingPd ≥ 3284 kPa
+10Hz/2sec.-5Hz/2sec.Pd > 3546 kPa
Hot gasFanCompressorPressure Range
Frequency
holding
Normal controlPs ≤ 242 kPa
OffNormal control
Ps ≥ 399 kPa
On
-10Hz/2sec.-5Hz/2sec.
Ps ≤ 229 kPa
before
1min
StopStop
Ps ≤ 229 kPa
after 1min
Hot gasFanCompressor
Pressure Range