LGRED Installation Manual

83
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
WITH
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 LMU361, 421, 480HHV.
Location of DIP Switches on Multi F and Multi F MAX Outdoor Units
Figure 109: Multi F with LGRED (LMU180-240-300HHV)
Outdoor Unit DIP Switch Locations.
3
12 43
12 43
ON
OFF
5
5
5
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FINAL INSTALLATION PROCEDURES
1234
56
ON
OFF
Figure 110: Multi F MAX with LGRED (LMU361-421-480HHV) Outdoor Unit
DIP Switch Locations.
Figure 111: LMU180-240-300HHV Forced Cooling DIP Switch Setting. Figure 112: LMU361-421-480HHV Forced Cooling DIP Switch Setting.
LMU180 / 240 / 300HHV
(18 / 24 / 30kBtu/h)
SW1
5
DIP_SW01D
6
LMU361HHV / LMU421HHV / LMU480HHV
(36 / 42 / 48 kBtu/h)