Goodman Condensing Unit GSX130181B

Disconnect all power sources before servicing or installing.

Ensure multiple power sources are checked and disconnected.

Remove unit wiring from disconnect switch.

Wire a test cord to the disconnect switch.

Ensure protective terminal cover is in place.

Connect the leads to the compressor terminals

Check for 230 volts to the motor connections L and N using a voltmeter

Is 230 volts present at the motor connections L and N?

Check the line voltage circuit to the motor if 230 volts is not present

Check for 24 volts from terminal C to either terminal 1, 2, 3, 4, or 5 using a voltmeter

Is 24 volts present from terminal C to the selected terminal?

Check 24 volt circuit to motor if no voltage is present

Determine if the motor needs replacement

Ensure the belly band is between the vents on the motor

Attach an accurate thermometer or thermocouple type temperature tester to the liquid line as it leaves the condensing unit.

Install a high side pressure gauge on the high side (liquid) service valve at the front of the unit.

Record the gauge pressure of the liquid line.

Record the temperature of the liquid line.

Review the technical information manual or specification sheet for the model being serviced to obtain the design subcooling.

Enter the design subcooling value from the technical manual.

Pressure Control Settings Verification

Enter the current pressure in the suction line

Is the cut-out pressure approximately 21 PSIG for heat pumps or 55 PSIG for air conditioners?

Is the cut-in pressure approximately 50 PSIG for heat pumps or 95 PSIG for air conditioners?

Test for continuity using a VOM

Is the continuity test result as expected?

Measure compressor current while operating the system

Did the compressor amperage change by at least 25%?

Apply 18 to 28 volt ac to the unloader molded plug leads and listen for a click as the solenoid pulls in

Remove power and listen for another click as the unloader returns to its original position

Unloader Coil Resistance Measurement

Shut off power and remove the control circuit molded plug from the compressor