LG Multi V

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Copyright ©2008 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
❈ Frequency holding : frequency (or RPM) is not increasing ( can decrease )
3. Protection control
Pressure range, kPa(psi) Compressor Fan Hot gas
Hot gas
Stop Stop
-
-
-
-5Hz/4sec. +100RPM/4sec.
Frequency holding Normal control
Normal control
-
Pressure range, kPa(psi) Compressor Fan
Stop Stop
ON
-5Hz/4sec -100RPM/4sec.
Normal control Frequency holding
Normal control
OFF
.
Ph ≥ 4003 (580.6)
P
h > 3448 (500.1)
P
h ≥ 3219 (466.9)
P
h < 3219 (466.9)
P
l ≤ 190 (27.6) after 1min.
Pl ≤ 190 (27.6) before 1min.
Pl ≤ 229 (33.2)
Pl ≥ 399 (49.2)
P
h : high pressure
P
l : low pressure