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Function

3.1.2 Pressure control on heating mode

n High pressure control

n Low pressure control

3.1 Pressure protection control

3.1.1 Pressure control on cooling mode

n High pressure control

n Low pressure control

h Frequency holding : frequency (or RPM) is not increasing ( can decrease )

h Frequency holding : frequency (or RPM) is not increasing (can decrease).

3. Protection control

Pressure Range Compressor Fan

Pd ≥ 4000 kPa(580.2 psi) Stop Stop

Pd > 3775 kPa(547.5 psi) -15 Hz / 10 seconds +100 RPM / 10 seconds

Pd ≥ 3650 kPa(529.4 psi) Frequency holding RPM holding

Pd ≥ 3480 kPa(504.7 psi) +2 Hz or less / 10 seconds RPM holding

Pd < 3480 kPa(504.7 psi) Normal control

Pressure Range Compressor Fan

Ps ≤ 110 kPa(15.9 psi) Stop (1 min. later) Stop

Ps ≤ 150 kPa (21.8 psi) -10 Hz / 10 seconds -100 RPM / 10 seconds

Ps > 150 kPa (21.8 psi) Frequency holding RPM holding

Ps > 185 kPa (26.8 psi) +2 Hz or less / 20 seconds -100 RPM / 10 seconds

Ps > 220 kPa (31.9 psi) +2 Hz or less / 10 seconds -100 RPM / 10 seconds

Ps > 260 kPa (37.7 psi) Normal control

Pressure Range Compressor Fan

Ps ≤ 50 kPa (7.3 psi) Stop (1 min. later) Stop

Ps ≤ 70 kPa (10.2 psi) -10 Hz / 10 seconds +100 RPM / 10 seconds

Ps ≤ 70 kPa (10.2 psi) Frequency holding RPM holding

Ps > 100 kPa (14.5 psi) +2 Hz or less / 20 seconds +100 RPM / 10 seconds

Ps > 185 kPa (26.8 psi) +2 Hz or less / 10 seconds +100 RPM / 10 seconds

Ps > 220 kPa (31.9 psi) Normal control

Pressure Range Compressor Fan

Pd ≥ 4000 kPa(580.2 psi) Stop Stop

Pd > 3415 kPa(495.3 psi) -15 Hz / 10 seconds -50 RPM / 10 seconds

LG Multi V Service Manual

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