Introduction The System; Specifications For Operation; Fundamental Theory Of Operation - GE ASYW09CRAWA Service Manual

Introduction the System

Single Zone Ductless Split System Heat Pumps feature a wall
mounted indoor unit that receives refrigerant from an inverter
driven variable speed outdoor unit. System operation is
controlled by a hand-held remote.
The outdoor unit features a variable speed rotary
compressor, EEV metering device and DC fan motor. These
systems use R410A refrigerant and PVE oil. The outdoor units
are 208/230 volt rated systems for 18k/24k and 115 volt for
9k /12k. They are factory charged for up to 25 feet of
refrigerant piping.
The indoor section features room and coil temperature
sensors that work together to maintain the desired
temperature.

Specifications for Operation

This system is
ranges of 60°F to 86°F in cooling mode and 60°F to 86°F in
heat mode.
Hydrolysis. There is no need to add a refrigeration drier
when servicing or installing this system.
F
indoor unit to the outdoor section. Do not splice these wires,
as a communication error may result, causing the indoor unit
to display an error code of E7.
indoor and outdoor units. Tubing must be sized per the
specifications of the unit being installed and must be
insulated. Any adjustments to the original factory charge
must be by weigh-in ONLY.
condensate pump may be added to the system. Always
follow the manufacturer's installation instructions when
installing a condensate pump.
. Clearances to obstructions for both indoor and outdoor
units mustbe maintained must be maintained per this
manual.

Fundamental Theory Of Operation

The indoor unit will sense room temperature at the point
where the wall unit is installed. The indoor fan will run
continuously in the cooling mode. When heating, the
fan will cycle on and off to distribute any warmth remaining
in the coil.
copper wire
Introduction
The inverter compressor system in the outdoor unit will vary
the refrigerant flow and indoor air volume levels to match
the heating or cooling demand inside the conditioned space.
If an abnormal condition is detected by the system's sensors,
reactive measures will be taken.
The amount of refrigerant flow and associated capacity
generated by the system will be determined by how fast the
variable speed rotary compressor is pumping.Thecompressor
operating speed is determined bythe difference between
the conditioned space temperature and the set point
established by the remote control.
If a large amount of capacity is needed, the compressor will
operate at a high speed. As the need for capacity
reduces and the temperature of the room nears set point,
the compressor will slow down. When set point has been
reached, the compressor will shut off.Once a difference
in temperature is sensed between the set point and room
temperatures,the compressor will restart at a new
calculated speed.
System sensors determine if and when the compressor
speed should be changed to match a change in demand
for heating or cooling.It should be noted that the frequency
that is sent to the compressor cannot be determined by
a servicing technician.
In this manual, system components, operation, sensor
functions ,and diagnostic procedures will be explained in
greater detail.
INTRODUCTION PAGE 5