Product Introduction (System Overview) - Gree GWH12TB-D3DNA1A Installation, Service & Troubleshooting

System Overview
e Terra Ductless split heat pumps are a single zone
unit available in size from 9000 btuh to 24, 000 btuh
providing heating and cooling. All comfort settings
are controlled by a remote control.
many features to enhance comfort and e ciency.
operation of these features will be explained later in
this service manual.
Superior inverter technology is used to control capac-
ity while maintaining maximum e ciency.
systems are equipped with G10 inverter technology
providing precise control over the compressor frequen-
cy based on operating pressures and temperatures.
Should an abnormal condition occur, the so ware will
adjust the compressor frequency or shut down the
system indicating the appropriate fault.
e indoor unit contains a digital display, which will
indicate the current fault.
tors, fan motors and circuit board are also components
of the indoor unit. e indoor units have a bypass
switch to bypass the remote control if lost or batteries
fail. is will be explained later in this service manual.
e systems require R410A and are pre-charged for 25'
of lineset. Please refer to your installation manual for
additional charge for linesets longer than 25' .
e systems use a PVE oil and should require no ad-
ditional oil. All Terra units utilize an Oil Return Mode
which will return oil to the compressor should the
need arise.
Product Introduction
e Terra unit has
e Terra
e evaporator, swing mo-
e
Compressor
Indoor Display
Circuit Board with
G10 Technology
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