Install Instructions

86
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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FINAL INSTALLATION PROCEDURES
Forced Cooling Operation Function
Use to add refrigerant to the system when outside ambient temperatures are cool (ex.: winter).
1. Shut power down to the system.
2. Set DIP Switch 1 to ON.
3. Turn power on to the system.
4. Verify that the Red LED on the outdoor unit
PCB is ON (indicates indoor units are in forced
cooling operation).
5. Add refrigerant.
• If the green LED light on the outdoor unit PCB is ON, it indicates the compressor is OFF due to low
pressure in the system.
• Turn DIP Switch 1 to OFF after finishing (Normal Operation setting).
• Only the first four DIP switches are used to set settings and functions.
Location of DIP Switches on Multi F and Multi F MAX Outdoor Units
Figure 114: Multi F (LMU180-240HV) Outdoor Unit DIP Switch Locations. Figure 115: Multi F (LMU30-36CHV) Outdoor Unit DIP Switch Locations.
DIP SW1 DIP SW1
LMU180 / 240HV (18 / 24 kBtu/h)
LMU180HV
(18 kBtu/h)
12 43
12 43
ON
OFF
5
5
LMU240HV
(24 kBtu/h)
12 43
12 43
ON
OFF
5
5
SW1
LMU30CHV / LMU36CHV (30 / 36 kBtu/h)
12 43
12 43
ON
OFF
5
5
DIP_SW01D
LMU601HV (60 kBtu/h)
12 43
12 43
ON
OFF
5
5
6
6
Figure 116: Multi F MAX (LMU481-541HV) Outdoor Unit DIP Switch
Locations.
Figure 117: Multi F MAX (LMU601HV) Outdoor Unit DIP Switch Locations.
Figure 118: LMU180-240HV-30-
36CHV Forced Cooling DIP Switch
Setting.
DIP_SW01D
6
LMU481HV / LMU541HV (48 / 54 kBtu/h)
12 43
ON
OFF
5
Figure 119: LMU481-541-601HV
Forced Cooling DIP Switch Setting.
1234
56
ON
OFF