Theory Of Operation; Internal Air Flow - Fisher & Paykel 790 Active Smart Service Manual

5

THEORY OF OPERATION

5.1

Internal Air Flow

The freezer fan draws air through the evaporator and into a duct in the rear wall of the freezer compartment.
This air exits through the fan grill at the top of the freezer compartment. The air behind the freezer coil cover
is also diverted through the divider partition to another fan which supplies the cold air into the provision
compartment. The amount of air is controlled electronically by two sensors which in turn regulate the speed
of both PC and FC fans to maintain selected temperatures in each compartment.
Air from the PC returns to the FC evaporator by way of the return air duct which is built into the divider
partition. This air is drawn across the evaporator by the evaporator FC fan motor to be recirculated again
throughout the PC / FC compartments.
"B" Model
Active Smart
Diagram 5.1A
"T" Model
Active Smart
FC Fan
PC Fan
PC Sensor
Diagram 5.1B
12