Install Instructions

89
Final Installation Procedures
Due to our policy of continuous product innovation, some specifications may change without notification.
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MULTI
F
MAX
MULTI
F
• 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.
• If indoor unit operation is set by the fan speed
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• Only the first four DIP switches are used to set
settings and functions.
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 130: LMU180HV~240HV, LMU30-36CHV Mode Lock DIP
Switch Settings.
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FINAL INSTALLATION PROCEDURES
Mode Lock
Prevents mixed mode operation (mode change) in applications
where only one mode is necessary.
1. Shut power down to the system.
2. For Only Cooling Mode Lock, set only DIP Switches 1 and 2 to
ON. For Only Heating Mode Lock, set only DIP Switches 3 and 4
to ON.
3. Turn power on to the system.
12 43
12 43
ON
OFF
5
5
Only Cooling Mode Lock Only Heating Mode Lock
12 43
12 43
ON
OFF
5
5
Figure 131: LMU481-541-601HV Mode Lock DIP Switch Settings.
Only Cooling Mode Lock
Only Heating Mode Lock
1234
56
ON
OFF
1234
56
ON
OFF
Figure 132: LMU180HV~240HV, LMU30-36CHV Night Quiet Mode with
Mode Lock DIP Switch Settings.
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settings and functions.
12 43
ON
OFF
5
12 43
12 43
ON
OFF
5
5
Figure 133: LMU481-541-601HV Night Quiet Mode with Mode Lock DIP Switch Settings.
Step 1: Night Quiet Mode + Mode Lock
(Cooling)
Step 2: Reducing Saving Power Consump-
tion + Mode Lock (Cooling)
1234
56
ON
OFF
1234
56
ON
OFF
Table 40: Night Quiet Mode + Mode Lock Settings.
Type Model Number Night Quiet
Standard Cooling
Sound Level (dBA)
Step 1
(dBA)
Step 2
(dBA)
Multi F
LMU180HV ODU DIP Switch 49 46 44
LMU240HV ODU DIP Switch 50 46 44
LMU30CHV ODU DIP Switch 52 49 46
LMU36CHV ODU DIP Switch 52 49 46
Multi F MAX
LMU481HV ODU DIP Switch 53 49 46
LMU541HV ODU DIP Switch 53 49 46
LMU601HV ODU DIP Switch 56 51 47