Goodman Mfg RT6100004R13 manual Chart on Next

Page 39

 

Troubleshooting Chart for ECM Variable Speed Air Circulator Blower Motors

SERVICING

 

 

Symptom

Fault Description(s)

Possible Causes

Corrective Action

Cautions and Notes

 

 

 

 

 

 

 

- Motor rocks

- This is normal start-up for

----

----

----

 

slightly

 

variable speed motor.

 

when starting.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- Manual disconnect switch off or

- Check 230 Vac power at motor.

 

 

 

 

door switch open.

- Check low voltage (24 Vac R to C) at motor.

- Turn power OFF prior to repair.

 

 

 

- Blown fuse or circuit breaker.

- Check low voltage connections

 

 

 

Wait 5 minutes after

 

 

 

- 24 Vac wires miswired.

(G, Y, W, R, C) at motor.

 

 

- No movement.

disconnecting power before

 

 

- Unseated pins in wiring

- Check for unseated pins in connectors

 

 

 

opening motor.

 

 

 

harness connectors.

on motor harness.

 

- Motor won't

 

- Handle electronic motor/control with care.

 

 

- Bad motor/control module.

- Test with a temporary jumper between R - G.

 

 

 

 

start.

 

- Moisture present in motor or control module.

-

 

 

 

 

 

 

 

 

 

 

- Loose motor mount.

- Check for loose motor mount.

- Turn power OFF prior to repair.

 

 

 

Wait 5 minutes after

 

 

- Motor rocks,

- Make sure blower wheel is tight on shaft.

 

 

- Blower wheel not tight on motor shaft.

disconnecting power before

 

 

but won't start.

- Perform motor/control replacement check,

 

 

- Bad motor/control module.

opening motor.

 

 

 

ECM motors only.

 

 

 

 

- Handle electronic motor/control with care.

 

 

 

 

 

 

 

 

 

 

 

 

- Motor

 

 

 

 

 

oscillates up &

- It is normal for motor to

 

 

 

 

down while

oscillate with

----

----

----

 

being tested

no load on shaft.

 

 

 

 

off of blower.

 

 

 

 

 

 

 

 

 

 

 

 

 

- Variation in 230 Vac to motor.

- Check line voltage for variation or "sag".

 

 

 

 

- Unseated pins in wiring harness

- Check low voltage connections

 

 

 

- Varies up and down

connectors.

(G, Y, W, R, C) at

- Turn power OFF prior to repair.

 

 

- Erratic CFM command from

motor, unseated pins in motor

 

 

or intermittent.

 

 

"BK" terminal.

harness connectors.

 

 

- Motor starts,

 

 

 

 

- Improper thermostat connection or setting.

- Check-out system controls - Thermostat.

 

 

but runs

 

- Moisture present in motor/control module.

- Perform Moisture Check.*

 

 

erratically.

 

 

 

 

 

 

 

 

- Does removing panel or filter

 

 

 

- "Hunts" or "puffs" at

- Incorrect or dirty filter(s).

reduce "puffing"?

 

 

 

- Incorrect supply or return ductwork.

- Check/replace filter.

- Turn power OFF prior to repair.

 

 

high CFM (speed).

 

 

- Incorrect blower speed setting.

- Check/correct duct restrictions.

 

 

 

 

 

 

 

 

 

- Adjust to correct blower speed setting.

 

 

 

 

 

 

 

 

*Moisture Check

-Connectors are oriented "down" (or as recommended by equipment manufacturer).

-Is condensate drain plugged?

-Check for undercharged condition.

-Arrange harnesses with "drip loop" under motor.

-Check for low airflow (too much latent capacity).

-Check and plug leaks in return ducts, cabinet.

Note: You must use the correct replacement control/motor module since they are factory programmed for specific operating modes. Even though they look alike, different modules may have completely different

functionality. The ECM variable speed motors are c

Important Note: Using the wrong motor/control module voids all product warranties and may produce unexpected results.

39

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Image 39
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 ElementsEvacuation ChargingEvacuation 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 StaticAccessories Wiring Diagrams ALL Fuel System AFE18-60A Control BoardALL 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