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XP20 SERIES
Outdoor Unit
A. Inspect component wiring for loose, worn or damaged
connections. Also check for any rubbing or pinching of
wires. Confirm proper voltage plus amperage outdoor
unit.
B. Check the cleanliness of outdoor fan and blade as
semblies. Check condition of fan blades (cracks).
Clean or replace them, if necessary.
C. Inspect base pan drains for debris and clean as neces
sary.
D. Inspect the condition of refrigerant piping and confirm
that pipes are not rubbing copper-to-copper. Also,
check the condition of the insulation on the refrigerant
lines. Repair, correct, or replace as necessary.
E. Test capacitor. Replace as necessary.
F. Inspect contactor contacts for pitting or burn marks.
Replace as necessary.
G. Check outdoor fan motor for worn bearings/bushings.
Replace as necessary.
H. Inspect and
clean
outdoor coils, if necessary and note
any damage to coils or signs of leakage.
Indoor Unit (Air Handler or Furnace)
A. Inspect component wiring for loose, worn or damaged
connections. Confirm proper voltage plus amperage
indoor unit.
B. Inspect and clean or replace air filters in indoor unit.
C. Check the cleanliness of indoor blower and clean
blower, if necessary.
D. Inspect the evaporator coil (Indoor) drain pans and
condensate drains for rust, debris, obstructions, leaks
or cracks. Pour water in pans to confirm proper drain
age 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 heat pump to check operating func
tions such as the startup and shutoff operation. He
will also check for unusual noises or odors, and meas
ure indoor/outdoor temperatures and system pres
sures as needed. He will check the refrigerant charge
per the charging sticker information on the outdoor
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.
