Goodman Mfg RT6100004R13 15B Capacitance Check, 16B Checking FAN and Blower Motor ECM Motors

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SERVICING

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

S-16A CHECKING FAN AND BLOWER MOTOR WINDINGS (PSC MOTORS)

The auto reset fan motor overload is designed to protect the motor against high temperature and high amperage condi- tions by breaking the common circuit within the motor, similar to the compressor internal overload. However, heat gener- ated within the motor is faster to dissipate than the compres- sor, allow at least 45 minutes for the overload to reset, then retest.

1.Remove the motor leads from its respective connection points and capacitor (if applicable).

2.Check the continuity between each of the motor leads.

3.Touch one probe of the ohmmeter to the motor frame (ground) and the other probe in turn to each lead.

If the windings do not test continuous or a reading is obtained from lead to ground, replace the motor.

S-16B CHECKING FAN AND BLOWER MOTOR (ECM MOTORS)

An ECM is an Electronically Commutated Motor which offers many significant advantages over PSC motors. The ECM has near zero rotor loss, synchronous machine operation, variable speed, low noise, and programmable air flow. Be- cause of the sophisticated electronics within the ECM motor, some technicians are intimated by the ECM motor; however, these fears are unfounded. GE offers two ECM motor testers, and with a VOM meter, one can easily perform basic troubleshooting on ECM motors. An ECM motor requires power (line voltage) and a signal (24 volts) to operate. The ECM motor stator contains permanent magnet. As a result, the shaft feels "rough" when turned by hand. This is a characteristic of the motor, not an indication of defective bearings.

WARNING

Line Voltage now present.

1.Disconnect the 5-pin connector from the motor.

2.Using a volt meter, check for line voltage at terminals #4 & #5 at the power connector. If no voltage is present:

3.Check the unit for incoming power See section S-1.

4.Check the control board, See section S-40.

5.If line voltage is present, reinsert the 5-pin connector and remove the 16-pin connector.

6.Check for signal (24 volts) at the transformer.

7.Check for signal (24 volts) from the thermostat to the "G" terminal at the 16-pin connector.

8.Using an ohmmeter, check for continuity from the #1 & #3 (common pins) to the transformer neutral or "C" thermostat terminal. If you do not have continuity, the motor may function erratically. Trace the common cir- cuits, locate and repair the open neutral.

9.Set the thermostat to "Fan-On". Using a voltmeter, check for 24 volts between pin # 15 (G) and common.

10.Disconnect power to compressor. Set thermostat to call for cooling. Using a voltmeter, check for 24 volts at pin # 6 and/or #14.

11.Set the thermostat to a call for heating. Using a voltme- ter, check for 24 volts at pin #2 and/or #11.

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Contents Service Instructions Important Information Table of ContentsSafe Refrigerant Handling Split System Air Conditioners R-22 Product IdentificationSplit System Air Conditioners R-22 Split System Heat Pumps R-22 Product Identification Single Piece Air Handlers Single Piece Air Handlers MBR/MBE Air Handlers 036 036 120 3642 1824 ASC01 AccessoriesCPKF24 CPKF36 CPKF42 CPKF48 CPKF60 CPKF61 Expansion Valve Kits FSK01A Coil Accessories Condensing Unit Product DesignProduct Design Heating System OperationCooling Cycle System Operation Indoor Coil Outdoor Thermostatic Expansion Valve Description AFE18-60A Control BoardCOOLING/HP Analysis Chart Troubleshooting ChartServicing Table of Contents Checking THERMOSTAT, WIRING, and Anticipator Checking Voltage Checking Wiring3A Thermostat and Wiring Servicing3C Heating Anticipator 3B Cooling AnticipatorTesting Coil Circuit Checking Time Delay RelayChecking Transformer Control Circuit Checking Cycle ProtectorTesting FAN Relay Testing Compressor ContactorChecking Contactor AND/OR Relays Checking Contactor ContactsApplies to ASC13 & ASH13 Copeland Comfort Alert DiagnosticsRed Trip Diagnostics TableTesting Capacitor Resistance Hard Start KIT WiringChecking Loss of Charge Protector Checking Capacitor15B Capacitance Check Testing Capacitance16A Checking FAN and Blower Motor Windings PSC Motors 16B Checking FAN and Blower Motor ECM Motors16C Checking ECM Motor Windings 16D ECM CFM AdjustmentsChart on Next Chart from Previous Itc h Checking Compressor 16E Checking GE X13TM Motors17A Resistance Test GE X13TM Motor Connections17B Ground Test Testing Compressor Windings17D Operation Test Compressor Ground TestTesting Defrost Control Testing Crankcase Heater Optional ItemTesting Defrost Thermostat Checking Reversing Valve and SolenoidSequence of Operation 40 AR*F & MBR Electronic Blowers Time Delay RelayAR*F & MBR With Single Stage Condensers AR*F & MBR With Single Stage Heat Pumps41 AEP* & MBE with Single Stage CON Densers AEP* & MBE Electronic Blower Time Delay Relay41A AEP* & MBE with Single Stage Heat Pumps Electric Heater Optional Item 61A Checking Heater Limit Controls Temperature Rise F @ CFM61B Checking Heater Fuse Link Optional Electric Heaters Leak Testing Nitrogen or NITROGEN-TRACEDChecking Heater Elements Refrigeration Repair PracticeCharging EvacuationEvacuation An inaccurately charged system will cause future prob- lems Checking Compressor Efficiency105B Thermostatic Expansion Valve Underfeeding OverfeedingSuperheat Thermostatic Expansion ValvesChecking Expansion Valve Operation Checking SubcoolingChecking Restricted Liquid Line Overcharge of RefrigerantNON-CONDENSABLES Compressor BurnoutRefrigerant Piping Suction Line Drier Clean-Up MethodInstallation Requirements System Charging Reversing Valve ReplacementCoil Static Pressure Drop AIR Handler External StaticTotal External Static Static Pressure DropALL Fuel System AFE18-60A Control Board Accessories Wiring DiagramsALL Fuel System Control Board AFE18-60A 10kw and Below, One Stage Electric Heat OT/EHR18-60 #2 GRD PLM PLF XFMR-R XFMR-C After Installing Optional Heat KIT, Mark AN X Provided Above HKR Heat Kit GRD PLM PLF Accessories Wiring Diagrams
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