Goodman Mfg RT6100004R13 manual 17B Ground Test, 17D Operation Test, Testing Compressor Windings

Page 43

SERVICING

1. Remove the leads from the compressor terminals.

See warnings S-17 before removing compressor terminal cover.

2.Using an ohmmeter, test continuity between terminals S- R, C-R, and C-S, on single phase units or terminals T2, T2 and T3, on 3 phase units.

C

OHMMETER

S

R

COMP

TESTING COMPRESSOR WINDINGS

If either winding does not test continuous, replace the compressor.

NOTE: If an open compressor is indicated, allow ample time for the internal overload to reset before replacing compressor.

S-17B GROUND TEST

If fuse, circuit breaker, ground fault protective device, etc., has tripped, this is a strong indication that an electrical problem exists and must be found and corrected. The circuit protective device rating must be checked, and its maximum rating should coincide with that marked on the equipment nameplate.

With the terminal protective cover in place, it is acceptable to replace the fuse or reset the circuit breaker ONE TIME ONLY to see if it was just a nuisance opening. If it opens again, DO NOT continue to reset.

Disconnect all power to unit, making sure that all power legs are open.

1.DO NOT remove protective terminal cover. Disconnect the three leads going to the compressor terminals at the nearest point to the compressor.

2.Identify the leads and using a Megger, Hi-Potential Ground Tester, or other suitable instrument which puts out a voltage between 300 and 1500 volts, check for a ground separately between each of the three leads and ground (such as an unpainted tube on the compressor). Do not use a low voltage output instrument such as a volt- ohmmeter.

HI-POT

COMPRESSOR GROUND TEST

3.If a ground is indicated, then carefully remove the com- pressor terminal protective cover and inspect for loose leads or insulation breaks in the lead wires.

4.If no visual problems indicated, carefully remove the leads at the compressor terminals.

WARNING

Damage can occur to the glass embedded terminals if the leads are not properly removed. This can result in terminal and hot oil discharging.

Carefully retest for ground, directly between compressor terminals and ground.

5. If ground is indicated, replace the compressor.

S-17D OPERATION TEST

If the voltage, capacitor, overload and motor winding test fail to show the cause for failure:

1.Remove unit wiring from disconnect switch and wire a test cord to the disconnect switch.

NOTE: The wire size of the test cord must equal the line wire size and the fuse must be of the proper size and type.

2.With the protective terminal cover in place, use the three leads to the compressor terminals that were discon- nected at the nearest point to the compressor and connect the common, start and run clips to the respective leads.

3.Connect good capacitors of the right MFD and voltage rating into the circuit as shown.

4.With power ON, close the switch.

WARNING

Line Voltage now present.

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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 Servicing Checking Voltage Checking WiringChecking THERMOSTAT, WIRING, and Anticipator 3A Thermostat and Wiring3C Heating Anticipator 3B Cooling AnticipatorChecking Cycle Protector Checking Time Delay RelayTesting Coil Circuit Checking Transformer Control CircuitChecking Contactor Contacts Testing Compressor ContactorTesting FAN Relay Checking Contactor AND/OR RelaysApplies to ASC13 & ASH13 Copeland Comfort Alert DiagnosticsRed Trip Diagnostics TableChecking Capacitor Hard Start KIT WiringTesting Capacitor Resistance Checking Loss of Charge Protector16B Checking FAN and Blower Motor ECM Motors Testing Capacitance15B Capacitance Check 16A Checking FAN and Blower Motor Windings PSC Motors16C Checking ECM Motor Windings 16D ECM CFM AdjustmentsChart on Next Chart from Previous Itc h GE X13TM Motor Connections 16E Checking GE X13TM MotorsChecking Compressor 17A Resistance TestCompressor Ground Test Testing Compressor Windings17B Ground Test 17D Operation TestChecking Reversing Valve and Solenoid Testing Crankcase Heater Optional ItemTesting Defrost Control Testing Defrost ThermostatAR*F & MBR With Single Stage Heat Pumps 40 AR*F & MBR Electronic Blowers Time Delay RelaySequence of Operation AR*F & MBR With Single Stage Condensers41 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 @ CFMRefrigeration Repair Practice Leak Testing Nitrogen or NITROGEN-TRACED61B Checking Heater Fuse Link Optional Electric Heaters Checking Heater ElementsCharging EvacuationEvacuation An inaccurately charged system will cause future prob- lems Checking Compressor Efficiency105B Thermostatic Expansion Valve Thermostatic Expansion Valves OverfeedingUnderfeeding SuperheatChecking Expansion Valve Operation Checking SubcoolingCompressor Burnout Overcharge of RefrigerantChecking Restricted Liquid Line NON-CONDENSABLESRefrigerant Piping Suction Line Drier Clean-Up MethodInstallation Requirements System Charging Reversing Valve ReplacementStatic Pressure Drop AIR Handler External StaticCoil Static Pressure Drop Total External StaticALL 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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