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IV − MAINTENANCE
WARNING
Electric shock hazard. Can cause inju-
ry or death. Before attempting to per-
form any service or maintenance, turn
the electrical power to unit OFF at dis-
connect switch(es). Unit may have
multiple power supplies.
Maintenance and service must be performed by a qualified
installer or service agency. At the beginning of each cooling
and heating season, the system should be checked as fol-
lows:
Outdoor Unit
1. Clean and inspect outdoor coil (may be flushed with a
water hose). Ensure power is off before cleaning.
2. Outdoor unit fan motor is pre−lubricated and sealed. No
further lubrication is needed.
3. Visually inspect all connecting lines, joints and coils for
evidence of oil leaks.
4. Check all wiring for loose connections.
5. Check for correct voltage at unit (unit operating).
6. Check amp draw on outdoor fan motor.
Unit nameplate__________Actual__________.
7. Inspect drain holes in coil compartment base and clean
if necessary.
NOTE - If insufficient heating or cooling occurs, the unit
should be gauged and refrigerant charge should be
checked.
Indoor Coil
1. Clean coil if necessary.
2. Check connecting lines, joints and coil for evidence of
oil leaks.
3. Check condensate line and clean if necessary.
Indoor Unit
1. Clean or change filters.
2. Lennox blower motors are prelubricated and permanent-
ly sealed. No more lubrication is needed.
3. Adjust blower speed for cooling. Measure the pres-
sure drop over the coil to determine the correct blower
CFM. Refer to the indoor unit service manual for pres-
sure drop tables and procedure.
4.
Belt Drive Blowers −
Check belt for wear and proper
tension.
5. Check all wiring for loose connections.
6. Check for correct voltage at unit. (blower operating)
7. Check amp draw on blower motor.
Motor nameplate__________Actual__________.
