Outdoor Fan, Electrical Controls and Wiring

607C-- -- A

O	T2 C C O	DFT						OF2	OF1
R	T1
W
2
Y
C	Y
SPEEDUP	P1
SPEEDUP	J1	P3	INTERVALTIMER	90	60 30	30 60	120
	DFT		OFF		QUIET SHIFT		ON
	Speedup					Quiet		Defrost interval
	Pins					Shift		DIP switches
									A08020

Fig. 19 - Defrost Control

	Step 3 — Outdoor Fan	cycle to ensure proper operation. If discrepancies are observed in
	Keep the condenser fan free from all obstructions to ensure	operating cycle, or if a suspected malfunction has occurred, check
		each electrical component with the proper electrical
	proper cooling operation. Never place articles on top of the
		instrumentation. Refer to the unit wiring label when making these
	unit. Damage to unit may result.
		checkouts.

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 posi- tion 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 panels (see Fig 22) 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, 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

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 problem exists, be sure that all supply-air and return-air grilles are open and free from obstructions, and that the air filter is clean. When necessary, refer to Indoor Airflow and Airflow Adjustments section to check the system airflow.

Step 7 — Metering Devices-TXV & Piston

This unit uses 2 types of metering devices. The outdoor metering device is a fixed orifice and is contained in the brass hex-body in each liquid line feeding the outdoor coils. The indoor metering device is a TXV type device.