Multi F Outdoor Condenser Installation Manual

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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.
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to low pressure in the system.
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• 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 113: Multi F Outdoor Unit DIP Switch Locations.
Figure 114: LMU183-243-303-363HV
Forced Cooling DIP Switch Setting.
12 43
12 43
ON
OFF
5
5
Figure 115: LMU481-541-601HV
Forced Cooling DIP Switch Setting.
1234
56
ON
OFF
LMU183HV (18 kBtu/h) and LMU243HV (24 kBtu/h)
Main PCB
Sub PCB LMU243HV (24 kBtu/h)
Tact Switch
DIPSW1
DIPSW1
Tact Switch
Sub PCB LMU183HV (18 kBtu/h)
LMU303HV (30 kBtu/h) and LMU363HV (36 kBtu/h)
Inverter PCB
Sub PCB
DIPSW
Tact
Switch
LMU601HV (60 kBtu/h)
Tact Switch
DIPSW
LMU481HV (48 kBtu/h) and LMU541HV (54 kBtu/h)
Tact Switch
DIPSW