SERVICING

The discharge check valve closes off high side pressure to the compressor after shut down allowing equalization through the scroll flanks. Equalization requires only about ½ second.

To prevent the compressor from short cycling, a Time Delay Relay (Cycle Protector) has been added to the low voltage circuit.

RELAY, START

A potential or voltage type relay is used to take the start capacitor out of the circuit once the motor comes up to speed. This type of relay is position sensitive. The normally closed contacts are wired in series with the start capacitor and the relay holding coil is wired parallel with the start winding. As the motor starts and comes up to speed, the increase in voltage across the start winding will energize the start relay holding coil and open the contacts to the start capacitor.

Two quick ways to test a capacitor are a resistance and a capacitance check.

START

CAPACITOR

RED 10

VIOLET 20

YELLOW 12

 

START

 

 

RELAY

 

 

ORANGE 5

 

MOC MRHE NAF

T2

T1

 

RUN

L2 L1

CAPACITOR

CONTACTOR

HARD START KIT WIRING

S-15A RESISTANCE CHECK

HIGH VOLTAGE!

Disconnect ALL power before servicing or installing. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.

1. Discharge capacitor and remove wire leads.

WARNING

Discharge capacitor through a 20 to 30 OHM resistor before handling.

OHMMETER

CAPACITOR

TESTING CAPACITOR RESISTANCE

2.Set an ohmmeter on its highest ohm scale and connect the leads to the capacitor -

A.Good Condition - indicator swings to zero and slowly returns to infinity. (Start capacitor with bleed resistor will not return to infinity. It will still read the resistance of the resistor).

B.Shorted - indicator swings to zero and stops there - replace.

C.Open - no reading - replace. (Start capacitor would read resistor resistance.)

S-15B CAPACITANCE CHECK

Using a hookup as shown below, take the amperage and voltage readings and use them in the formula:

VOLTMETER

15 AMP

FUSE

AMMETER

CAPACITOR

TESTING CAPACITANCE

WARNING

Discharge capacitor through a 20 to 30 OHM resistor before handling.

Capacitance (MFD) = 2650 X Amperage

Voltage

42

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Goodmans SSX, GSZ, ASZ, ASX, DSZ, DSX, GSX, SSZ manual 15A Resistance Check, 15B Capacitance Check, RELAY, Start