Haier AW07LC2VHA Technical Overview page 55

SW1 DIP Switches
There are two sets of DIP switches on the Circuit Board. SW3
is for factory use only. SW1 is used to set the configuration
of the indoor unit operation. The first three switches SW1-1,
SW1-2 and SW1-3 select the indoor unit capacity.
Air Delivery Power is set with DIP Switches SW1-4 and SW1-5.
The settings are shown in Hydrostatic Selection of 0Pa, up to
30Pa. SW1-7 and SW1-8 define the unit type. The conversions
are as follows:
0Pa=0"w.c.
10Pa= .04"w.c.
20Pa=.08"w.c.
30Pa=.12"w.c.
• Recommended settings are for motorized Louver set
to 10Pa.
• Ducting limited to a total of .12"w.c. External Static
set to 30Pa.
The Blower Assembly
The blower assembly
consists of 2 plastic
blowers. The blower
motor is a DC variable
speed dual shaft type.
A set screw holds each
blower wheel to the
blower motor.
The indoor blower
motor is a Multi Speed Fan Motor that is connected to the
indoor unit control board via Plug CN-6. The wiring from the
motor to indoor board consists of 5 wires connected to pins
that deliver line voltage, speed, and feedback information.
During normal operation, the indoor control board will
energize the indoor blower motor and request proper speed.
Fan power should be set using the DIP Switches SW1 settings.
SLIM DUCT TECHNICAL OVERVIEW
Slim Duct Components
Accessory Louver Motors
The louver motors are stepper type motors that move the
louvers up/down. The motors are controlled by pulsed voltage
that cannot be measured. If the louver does not move when
it should, check for a bind in the louvers. If the louver is free to
move, refer to the Test Procedure Section.
Temperature Sensors
temperature information to the ECU that may be used in
frequency adjustments. See Temperature Sensor Functions.
temperature control.
Both sensors are negative temperature coefficient type that
reduce electrical resistance as temperature rises.
TECHNICAL OVERVIEW
The Piping Temperature
Sensor senses indoor coil
temperature in the cooling
mode and in the heating
mode. This sensor is used
for Anti Freezing and Anti
Cold Blow cycles. The
sensor also provides critical
The Ambient Temperature
Sensor senses room
temperature. This
sensor provides room
temperature information
to the ECU for calculation
of inverter capacity and
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