OUTDOOR UNIT CONTROLS AND COMPONENTS
PAGE 10
ENGLISH
The Reactor is a power filter. It is unlikely to ever have an
electrical failure of this component.
The Reactor of 24K, 30K and 36K is electrically connected to
the IPM on terminal connections CN3 and CN4.
The outdoor unit is powered by 208/230 volt single phase
electricity connected at the terminal block. Terminals 1 L (L1)
and 2 N( L2) connect this voltage to the system.
The number 3 terminal is communication that connects wiring
between the indoor and outdoor units. A ground terminal
connects the outdoor unit to the line voltage power source.
Condensate safety switches should break the wire on terminal
2.
The indoor unit is also powered by the same electrical supply
as the outdoor unit. 14/4 stranded copper wire is connected
to the wiring terminal block at the outdoor unit and is run to
the same terminals on the indoor terminal block.
When installing the field supplied wiring, make certain the
wire gauge is correct. There should not be any electrical
wiring splices between the indoor unit and outdoor unit wire
connection 3. This wire is used to carry communication data
between the indoor and outdoor units. A wiring splice where
wires are twisted in a wire nut may cause deformation of the
communication signal. If communication is lost between the
indoor and outdoor units, an ERROR CODE E7 will occur. (See
Page 36.)
The fan motor is a variable speed motor. The required speed is
calculated by the PCB. The motor is electrically connected to
the PCB via PLUG CN-21.
In COOL MODE, the motor will slow down as outdoor air
temperature falls. In HEAT MODE, the motor will increase
speed as the outdoor air temperature falls.
The compressor is a three phase DC inverter driven rotary
type, capable of variable speed operation. The compressor
operating frequency will be determined by the temperature
difference between set point and room temperature.
The compressor of 24K, 30K and 36K is electrically connected
to the IPM on terminal connections CNS, CN6 and CN7.
Protection of the compressor will be provided by the
discharge temperature sensor, the suction line temperature
sensor, and the overcurrent protection parameter in the PCB.
Terminal Block
Compressor
Power Factor Reactor
Outdoor Fan Motor
