Capillary Tube Assy (Cool Only Units) - Friedrich CEW18B33A Service Manual

Capillary Tube Assy (Cool Only Units)

Test the Capillary Tube and Check Valve Assy
1. Check the capillary tube temperature by hand where the refrigerant enters the capillary tube. A partial restriction of
the capillary tube will be indicated by frost or freezing in that area.
2. If the capillary tube is fully restricted, then pressure will increase and pressure switch will open if installed. If
no pressure switch is installed, the unit will shut down due to the compressor overload opening. High discharge
temperature will be present at the compressor.
Arrows Indicate Direction of Flow
27
COMPONENT TESTING
Accumulator
Indoor
Coil
(Evaporator)
Cap Tube (Cooling Only)
Figure 501 (Cooling Only Refigerant Flow)
Compressor
Outdoor Coil
(Condensor)