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
3.1.2 Pressure control on heating mode
■ High pressure control
■ Low pressure control
❈ Frequency holding : frequency (or RPM) is not increasing ( can decrease )
Pressure range, kPa(psi) Compressor Fan Hot gas
Hot gas
Stop Stop
ON
-5Hz/4sec. -50RPM/4sec.
Normal control Frequency holding
Ph < Target Pressure
Normal control OFF
Pressure range, kPa(psi) Compressor Fan
Frequency holding Normal control
ON
-5Hz/4sec. +100RPM/4sec.
Stop Stop
Normal control
OFF
Normal control
Normal control
P
h ≥ 4003 (580.6)
P
h > 3807 (552.2)
P
h ≥ 3644 (528.5)
P
h ≥ 3448 (500.1)
P
l ≤ 190 (27.6) after 1min.
P l ≤ 190 (27.6) before 1min.
Pl ≤ 229 (33.2)
Pl ≤ 268 (38.9)
Pl > 307 (44.5)
Function
Ph : high pressure
P
l : low pressure