Haier 2U18MS2VHB Installation Manual page 3

Temperature Control and the Inverter
The outdoor unit inverter will operate the compressor,
outdoor fan motor and indoor fan motor at the proper speed
to provide enough capacity to satisfy the heat load from all
operating indoor units.
As the temperature in the zones gets closer to the setpoint
requirement, the inverter will slow everything down. This is
normal operation.
As temperature setpoint is reached, the inverter will run
everything slowly to provide small amounts of capacity to
keep the rooms comfortable. At times, the air coming out of
the indoor units will be close to or at room temperature. This
is normal.
This precise match of capacity and load is how ductless air
conditioners acheive high efficiency ratings.
Matching up the outdoor unit to indoor units
The approved combinations of indoor unit capacity and
outdoor unit model are shown at the right. The capacity
ratings can be matched to any of the high wall, cassette, or
ducted concealed models.
The systems are not rated for use of only 1 indoor unit. Do
not vary from the available combinations in these tables.
When ports are not used, always connect the refrigerant
lines to circuits located at the outdoor units lowest possible
connection. Use line reducing fittings to transition from the
outdoor port size to the required port size of the indoor unit.
Operating Temperature Ranges
•
Cool Mode: 14 O F - 114 O
•
Heat Mode: 5 F - 74 F
O O
Introduction - Overview
Outdoor Unit Product Information
F
INSTALLATION PAGE 3