8
The +
MULTI
Ductless split heat pumps are a multi
zone unit available in size from 9000 btuh to 42, 000
btuh providing heating and cooling. All comfort
settings are controlled by a remote control. The
+MULTI
unit has many features to enhance comfort
and efficiency. The operation of these features will be
explained later in this service manual.
Superior inverter technology is used to control capac-
ity while maintaining maximum efficiency. The
+
MULTI
systems are equipped with G10 inverter
technology providing precise control over the
compressor frequency based on operating pressures
and temperatures. Should an abnormal condition
occur, the software will adjust the compressor
frequency or shut down the system indicating the
appropriate fault.
The indoor unit contains a digital display, which will
indicate the current fault. The evaporator, swing mo-
tors, fan motors and circuit board are also components
of the indoor unit. The indoor units have a bypass
switch to bypass the remote control if lost or batteries
fail. This will be explained later in this service manual.
The systems require R410A and are pre-charged for
specific
lineset
lenght
. Please refer to your installation
manual for
maximum pre-charge line lenght and
additional charge for
longer
lineset
lenght
s
.
The maximum allowable line lift and distances vary
by model, please refer to the charts in the manual for
proper lineset applications.
The systems use a PVE oil and should require no
addi-tional oil. All +
MULTI
units utilize an Oil
Return Mode which will return oil to the compressor
should the need arise.
System Overview
Product Introduction
Circuit Board with
G10 Technology
Compressor
Indoor Display
