Protection Control; Pressure Protection Control - LG MULTI V M ARNU07GTU 4 Series Svc Manual

3. Protection control

3.1 Pressure protection control

3.1.1 Pressure control on cooling mode
n High pressure control
Pressure Range
Pd ≥ 4167
Pd ≥ 4036
Pd ≥ 3938
Pd < 3840
n Low pressure control
Pressure Range
Ps ≤ 98 kPa, 1 minute later operation
Ps ≤ 124 kPa
h Frequency holding : frequency (or RPM) is not increasing ( can decrease )
3.1.2 Pressure control on heating mode
n High pressure control
Pressure Range
Pd > 3846 kPa
Pd ≥ 3513 kPa
Pd ≥ 3317 kPa
Pd ≥ 3115 kPa
Pd < 3115 kPa
n Low pressure control
Pressure Range
Ps ≤ 98 kPa, 1 minute later operation
Ps ≤ 124 kPa
Ps > 124 kPa
Ps ≥ 137 kPa
Ps ≥ 190 kPa
h Frequency holding : frequency (or RPM) is not increasing ( can decrease ).
Compressor
Stop
-5Hz/10 s
Frequency holding
Normal control
Compressor
-15Hz/10 s
Frequency holding
Frequency holding
Compressor
-15Hz/10 s
Frequency holding
+2Hz or less/10 s
Compressor
Stop
-15Hz/10 s
Stop
Normal control
Stop
Normal control
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Function
Fan
-100RPM/10 s
Fan
-50RPM/10 s
-50RPM/10 s
RPM holding
Fan
+100RPM/10 s
+100RPM/10 s
+100RPM/10 s