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FIGURE 17
Defrost Control
Speedup
Pins
Step 3 — Outdoor Fan
Keep the condenser fan free from all obstructions to
ensure proper cooling operation. Never place articles on
top of the unit. Damage to unit may result.
1. Remove 6 screws holding outdoor grille and motor to
top cover.
2. Turn motor/grille assembly upside down on top cover to
expose fan blade.
3. Inspect the fan blades for cracks or bends.
4. If fan needs to be removed, loosen setscrew and slide
fan off motor shaft.
5. When replacing fan blade, position blade back to same
position as before.
6. Ensure that setscrew engages the flat area on the
motor shaft when tightening.
7. Replace grille.
Step 4 — Electrical Controls and Wiring
Inspect and check the electrical controls and wiring
annually. Be sure to turn off the electrical power to the
unit.
Remove access panel to locate all the electrical controls
and wiring. Check all electrical connections for tightness.
Tighten all screw connections. If any discolored or burned
connections are noticed, disassemble the connection,
Quiet
Defrost interval
Shift
DIP switches
clean all the parts, restrip the wire end and reassemble
the connection properly and securely.
After inspecting the electrical controls and wiring, replace
all the panels. Start the unit, and observe at least one
complete cooling cycle to ensure proper operation. If
discrepancies are observed in operating cycle, or if a
suspected malfunction has occurred, check each
electrical
instrumentation. Refer to the unit wiring label when
making these checkouts.
Step 5 — Refrigerant Circuit
Inspect all refrigerant tubing connections and the unit
base for oil accumulation annually. Detecting oil generally
indicates a refrigerant leak.
If oil is detected or if low performance is suspected,
leak--test all refrigerant tubing using an electronic leak
detector, or liquid--soap solution. If a refrigerant leak is
detected, refer to Check for Refrigerant Leaks section.
If no refrigerant leaks are found and low performance is
suspected, refer to Checking and Adjusting Refrigerant
Charge section.
Step 6 — Indoor Airflow
The heating and/or cooling airflow does not require
checking unless improper performance is suspected. If a
component
with
the
proper
electrical
21
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