Location Of Dip Switches On Multi F And Multi F Max Outdoor Units; Forced Cooling Operation Function - LG MULTI F Series Installation Manual

FINAL INSTALLATION PROCEDURES

Location of DIP Switches on Multi F and Multi F MAX Outdoor Units

Figure 113: Multi F with LGRED (LMU180-240-300HHV) Outdoor Unit
DIP Switch Locations.
SW1

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 functional on the LMU360, 420HHV.
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Figure 114: Multi F MAX with LGRED (LMU360-420HHV) Outdoor Unit
DIP Switch Locations.
F
MULTI
WITH
F
MULTI MAX
Figure 115: LMU180-240-300HHV
Forced Cooling DIP Switch Setting.
3
ON
OFF
1 2 3 4
1 2 3 4
Figure 116: LMU360-420HHV Forced
Cooling DIP Switch Setting.
ON
OFF
1 2 3 4
5 6 7 8
5
5
5
9 10