Multi F Four-Way Ceiling Cassette Service Manual

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Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Part 3 Basic Control
6.1 High pressure protection control
6.2 Low pressure protection control
■ Cooling Mode
■ Heating mode
6.4 Input Current control
6. Protection control
❈ Remarks: The data of pressure and frequency are different model by model.
Pressure range Compressor
Pd ≥ 4069 kPa Off
3938 kPa ≤ Pd < 4069 kPa
3Hz down
3840 kPa ≤ Pd < 3938 kPa
3Hz down
3709 kPa ≤ Pd < 3840 kPa
Frequency holding
3611 kPa ≤ Pd < 3709 kPa
3 Hz up
Pd < 3611 kPa
Normal control
Pressure range Compressor
Pe
> 310 kPa
Normal control
278 kPa
< Pe ≤ 310 kPa
3Hz down
245 kPa
< Pe ≤ 278 kPa
3Hz down
212 kPa
< Pe ≤ 245 kPa
3Hz down
Pe ≤ 212 kPa Off
Pressure range Compressor
Pe
> 294 kPa
Normal control
255 kPa
< Pe ≤ 294 kPa
3Hz down
229 kPa
< Pe ≤ 255 kPa
3Hz down
203 kPa
< Pe ≤ 229 kPa
3Hz down
Pe ≤ 203 kPa Off
6.3 Discharge temperature control
Temperature range Compressor
Td ≥ 105 ℃ Off
100℃ ≤ Td
< 105℃
5Hz down
95℃ ≤ Td
< 100℃
5Hz down
93℃ ≤ Td
< 95℃
Frequency holding
90℃ ≤ Td
< 93℃
3 Hz up
Td
< 90℃
Normal control
Normal control Frequency down Comp off
Input current Less than 10A 14A or less Over than 14A
※ 14,16k models are not applied.
※ 14,16k models are not applied.
※ 14,16k models are not applied.