Install Instructions

88
MULTI F / MULTI F MAX Outdoor Unit Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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MULTI
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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 compressor 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.
3. For Step 2, set only DIP Switches 1 and 4 to ON.
4. Turn power on to the system.
Figure 126: LMU180HV~240HV, LMU30-36CHV Saving Power Consumption with Mode Lock DIP Switch Settings.
Step 1: Reducing Saving Power Con-
sumption + 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)
Step 1 Step 2
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12 43
ON
OFF
5
Figure 127: LMU481-541-601HV Saving Power Consumption with Mode Lock DIP Switch Settings.
12 43
ON
OFF
5
5
12 43
ON
OFF
5
5
12 43
ON
OFF
5
1234
56
ON
OFF
1234
56
ON
OFF
1234
56
ON
OFF
1234
56
ON
OFF
Step 1: Reducing Saving Power Con-
sumption + 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 128: LMU180HV~240HV, LMU30-36CHV Night Quiet Mode DIP
Switch Settings.
12 43
12 43
ON
OFF
5
5
12 43
ON
OFF
5
Figure 129: LMU481-541-601HV Night Quiet Mode DIP Switch Settings.
1234
56
ON
OFF
1234
56
ON
OFF
Operation sound: Step 1 > Step 2.
Step 1 Step 2
• If compressor frequency and fan speed are decreased, cooling capacity may also decrease.
• 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 used to set settings and functions.