Goodmans DSX, GSZ, ASZ, SSX, ASX, DSZ, GSX, SSZ manual Chart from Previous

Page 45

CHART CONTINUED FROM PREVIOUS PAGE.

 

 

 

 

Troubleshooting Chart for ECM Variable Speed Air Circulator Blower Motors

 

 

Symptom

 

Fault Description(s)

Possible Causes

Corrective Action

Cautions and Notes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- Check low voltage (Thermostat)

- Turn power OFF prior to repair.

 

 

 

 

- Stays at low CFM despite

- 24 Vac wires miswired or loose.

wires and connections.

Wait 5 minutes after

 

 

 

 

- Verify fan is not in delay mode -

disconnecting power before

 

 

 

 

system call for cool

- "R" missing/not connected at motor.

 

 

 

 

wait until delay complete.

opening motor.

 

 

 

 

or heat CFM.

- Fan in delay mode.

 

 

 

 

- Perform motor/control replacement

- Handle electronic motor/control

 

 

 

 

 

 

 

 

 

 

 

 

check, ECM motors only.

with care.

 

- Motor starts,

 

 

 

 

 

 

 

 

 

 

- Turn power OFF prior to repair.

 

 

but runs

 

 

 

- Is fan in delay mode? - wait until delay time complete.

Wait 5 minutes after

 

 

erratically.

 

 

- "R" missing/not connected at motor.

disconnecting power before

 

 

 

- Stays at high CFM.

- Perform motor/control replacement check, ECM

 

 

 

 

- Fan in delay mode.

opening motor.

 

 

 

 

 

motors only.

 

 

 

 

 

 

- Handle electronic motor/control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

with care.

 

 

 

 

 

 

 

 

 

 

 

 

- Blower won't shut off.

- Current leakage from controls

- Check for Triac switched t'stat

- Turn power OFF prior to repair.

 

 

 

 

into G, Y, or W.

or solid state relay.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- High static creating high blower speed.

- Check/replace filter.

 

 

 

 

 

 

- Incorrect supply or return ductwork.

 

 

 

 

 

- Air noise.

- Check/correct duct restrictions.

- Turn power OFF prior to repair.

 

 

 

 

- Incorrect or dirty filter(s).

 

 

 

 

 

- Adjust to correct blower speed setting.

 

 

 

 

 

 

- Incorrect blower speed setting.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- Loose blower housing, panels, etc.

- Check for loose blower housing,

 

 

- Excessive

 

 

- High static creating high blower

panels, etc.

- Turn power OFF prior to repair.

 

 

- Noisy blower or cabinet.

speed.

- Check for air whistling thru seams in

 

 

noise.

 

 

- Air leaks in ductwork, cabinets,

ducts, cabinets or panels.

 

 

 

 

 

 

or panels.

- Check for cabinet/duct deformation.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- High static creating high blower speed.

- Does removing panel or filter

 

 

 

 

 

 

reduce "puffing"?

 

 

 

 

 

- "Hunts" or "puffs" at

- Incorrect or dirty filter(s).

- Turn power OFF prior to repair.

 

 

 

 

- Check/replace filter.

 

 

 

 

high CFM (speed).

- Incorrect supply or return ductwork.

 

 

 

 

- Check/correct duct restrictions.

 

 

 

 

 

 

- Incorrect blower speed setting.

 

 

 

 

 

 

- Adjust to correct blower speed setting.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- Turn power OFF prior to repair.

 

 

 

 

- Motor failure or

 

 

Wait 5 minutes after

 

- Evidence of

 

malfunction has

- Moisture in motor/control module.

- Replace motor and perform

disconnecting power before

 

 

Moisture.

 

occurred and moisture

Moisture Check.*

opening motor.

 

 

 

 

 

 

 

 

is present.

 

 

- Handle electronic motor/control

 

 

 

 

 

 

 

with care.

 

 

 

 

 

 

 

 

 

 

*Moisture Check

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

- Arrange harnesses with "drip loop" under motor.

 

 

 

- Connectors are

 

 

 

- Is condensate drain plugged?

 

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

 

 

 

- Check for undercharged condition.

 

- 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

45

 

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.

 

SERVICING

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Contents Service Instructions Email us at customerservice@goodmanmfg.com Recognize Safety SYMBOLS, Words and LabelsImportant Information Fax us at 713 Fax us at 931 438Safe Refrigerant Handling Split System Heat Pumps R410A Product IdentificationModel # Description Split System Air Conditioners R410A ASX130**1AA Single Piece Air Handlers AWUF****1AA MBR/MBE Air Handlers Product Identification 1824 3642 ASX13 AccessoriesDSX/SSX16 ASX18 ASZ13 DSZ/SSZ16 ASZ18 Expansion Valve Kits FSK01A Coil Accessories Electric Heat Kitapplications Aruf Electric Heat Kitapplications Aepf Condensing Unit Product DesignFigure a Capacity Control Heating System OperationCooling Cooling CycleHeating Cycle Defrost CycleCooling Cycle System Operation Description AFE18-60A Control BoardCOOLING/HP Analysis Chart Troubleshooting Chart61B ServicingChecking THERMOSTAT, WIRING, and Anticipator Checking Wiring3A Thermostat and Wiring Checking Voltage3C Heating Anticipator 3B Cooling AnticipatorTesting Coil Circuit Checking Time Delay RelayChecking Transformer Control Circuit Checking Cycle ProtectorSingle Phase Testing Compressor ContactorChecking Contactor AND/OR Relays Checking Contactor ContactsTesting FAN Relay Copeland Comfort Alert DiagnosticsDiagnostics Table Checking High Pressure Control Checking Loss of Charge ProtectorChecking LOW Pressure Control Checking Capacitor15A Resistance Check 15B Capacitance CheckRELAY, Start 16B Checking FAN and Blower Motor ECM Motors 16A Checking FAN and Blower Motor Windings PSC MotorsChart on Next Chart from Previous 16C Checking ECM Motor Windings 16D ECM CFM Adjustments MBE / AepfCFM 16E Blower Performance Data 16F Checking GE X13TM MotorsGE X13TM Motor Connections Checking Compressor Testing Compressor Windings17A Resistance Test 17B Ground TestUnloader Test Procedure 17C Unloader Test Procedure17D Operation Test Compressor Ground TestTesting Defrost Control Testing Crankcase Heater Optional ItemTesting Defrost Thermostat Checking Reversing Valve and SolenoidChecking Heater Limit Controls 40 MBR/AR*F Electronic Blower Time Delay RelayChecking Heater Elements Sequence of OperationHeating Operation MBR/AR*F with Single Stage Heat Pumps41 MBE/AEPF with GSX, SSX, ASX, DSX Defrost OperationMBE/AEPF with Single Stage GSX, ASX and SSX Condensers 41A MBE/AEPF with Single Stage GSZ, SSZ, & ASZ Heat Pumps MBE/AEPF with TWO Stage ASX & DSX Condensers Sequence of OperationMBE/AEPF with TWO Stage ASZ & DSZ Heat Pump Units Electric Heater Optional Item 61A Checking Heater Limit Controls 61B Checking Heater Fuse Link Optional Electric HeatersFormulas Refrigeration Repair Practice Leak Testing Nitrogen or NITROGEN-TRACEDEvacuation Brazing MaterialsEvacuation ChargingChecking Compressor Efficiency Final Charge AdjustmentTXV Valves 105B Thermostatic Expansion ValvePressure vs. Temperature Chart 410A Required Liquid Line Temperature Underfeeding OverfeedingSuperheat Checking SubcoolingChecking Expansion Valve Operation 109A TWO Speed ApplicationFixed Orifice Restrictor Devices Subcooling Formula = Sat. Liquid Temp. Liquid LineOvercharge of Refrigerant Checking Restricted Liquid LineNON-CONDENSABLES Compressor BurnoutRefrigerant Piping Accessories for lines greater than 80 feetLong Line SET Application R-410A Tube SizingInstallation Requirements Initial System Charging AIR Handler External StaticCoil Static Pressure Drop Total External StaticStatic Pressure Drop ALL Fuel System AFE18-60A Control Board Accessories Wiring Diagrams10kw 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
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