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89
Final Installation Procedures
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
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Reducing Power Consumption with Mode Lock
Enables more efficient system operation by lowering the maximum power consumption value, as well as locks the mode of operation (Exam-
ple: In a cooling-only server room application where permission to adjust the system mode is highly limited). Changing modes can cause a
change in compressor frequency, which would cause problems with the setting. As such, if this mode is used, it is locked in either cooling or
heating. The function is rarely, if ever, used.
1. Shut power down to the system.
2. Set DIP Switches as indicated below, following the steps and chosen mode.
3. Turn power on to the system.
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FINAL INSTALLATION PROCEDURES
Night Quiet Mode
Lowers the operation sound of the outdoor unit by changing the com-
pressor frequency and fan speeds. Night quiet mode initiates eight
(8) hours after the highest outdoor air temperature is measured, then
is active for nine (9) hours.
1. Shut power down to the system.
2. For Step 1, set only DIP Switches 2 and 3 to ON. For Step 2, set
only DIP Switches 1 and 4 to ON.
3. Turn power on to the system.
• If compressor frequency and fan speed are decreased, cooling capacity also will decrease accordingly.
• Night Quiet Mode can only be used when system is in cooling operation.
• Change the DIP switches if Night Quiet Mode is no longer desired.
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• Only the first four DIP switches are functional on the LMU480, 540, 600HV.
Figure 118: Saving Power Consumption with Mode Lock DIP Switch Settings.
Step 1: Reducing Saving Power Consump-
tion + Mode Lock (Cooling)
Step 2: Reducing Saving Power Consump-
tion + Mode Lock (Cooling)
Step 1: Reducing Saving Power Consump-
tion + Mode Lock (Heating)
Step 2: Reducing Saving Power Consump-
tion + Mode Lock (Heating)
Figure 119: Night Quiet Mode DIP Switch Settings.
Step 1 Step 2
Night Quiet Mode with Mode Lock
Lowers the operation sound of the outdoor unit by changing the
compressor frequency and fan speeds, as well as locks the mode of
operation. Changing modes can cause a change in compressor fre-
quency, which would cause problems with the setting. As such, if this
mode is used, it is locked in either cooling or heating. The function
is rarely, if ever, used. Night quiet mode initiates eight (8) hours after
the highest outdoor air temperature is measured, then is active for
nine (9) hours.
1. Shut power down to the system.
2. For Step 1, set only DIP Switches 2 and 4 to ON. For Step 2, set
DIP Switches 1 and 3 to ON.
3. Turn power on to the system.
Step 1: Night Quiet Mode + Mode Lock
(Cooling)
Step 2: Reducing Saving Power Consump-
tion + Mode Lock (Cooling)
Figure 120: Night Quiet Mode with Mode Lock DIP Switch Settings.
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