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Pour water in pans to confirm proper drainage from the
pan through to the outlet of the pipe. Clean or replace
as necessary.
E. Inspect and clean evaporator (indoor) coil, if neces
sary.
F. Inspect the condition of the refrigerant lines and con
firm that pipes are not rubbing copper-to-copper. Also,
ensure that refrigerant pipes are not being affected by
indoor air contamination. Check condition of insulation
on the refrigerant lines. Repair, correct, or replace as
necessary.
G. Inspect the duct system for leaks or other problems.
Repair or replace as necessary.
H. Check for bearing/bushing wear on indoor blower mo
tor. Replace as necessary.
I. Indoor unit inspections of gas- or oil-fired furnaces will
also include inspection and cleaning of the burners
and and a full inspection of the gas valve, heat ex
changer and flue (exhaust) system.
General System Test with System Operating
A. Your technician should perform a general system test.
He will turn on the air conditioner to check operating
functions such as the startup and shutoff operation.
He will also check for unusual noises or odors, and
measure indoor/outdoor temperatures and system
pressures as needed. He will check the refrigerant
charge per the charging sticker information on the out
door unit.
B. Verify that system total static pressure and airflow set
tings are within specific operating parameters.
C. Verify correct temperature drop across indoor coil.
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