Carrier PrimeLINE 69NT40-561, Inspection Manual

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7. Examine the drain cup, drain funnel and drain gutters. Repair as
required.
8. Clean the defrost drain lines using a low pressure water hose to
flush debris contained in the drain (Refer to Figure 6 ), and check
that the water is running freely to the outside.
Figure 6 Defrost Drain
9. Examine the TXV (Thermostatic Expansion Valve) or EEV
(Electronic Expansion Valve) for:
a. Refrigerant leaks (TXV or EEV).
b. Corrosion (TXV or EEV).
c. Proper insulation of the power head (TXV equipped,
refer to Figure 7 ).
d. Proper sensing bulb location and insulation (TXV
equipped, refer to Figure 7 ).
e. Electrical coil is correctly seated on the EEV (EEV
equipped, refer to Figure 8 ).
f. EEV coil boot is properly fitted over valve (EEV
equipped, refer to Figure 8 ).
g. Correct position of ETS1 and ETS2, securing tie is in
position and insulation is in place (Refer to Figure 9 ).