Goodmans ASX, GSZ Testing Crankcase Heater Optional Item, Checking Reversing Valve and Solenoid

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SERVICING

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.

A. If the compressor starts and continues to run, the cause for failure is somewhere else in the system.

B. If the compressor fails to start - replace.

COPELAND COMPRESSOR

03 A 12345 L

YEAR MONTH SERIAL PLANT NUMBER

S-18 TESTING CRANKCASE HEATER (OPTIONAL ITEM)

The crankcase heater must be energized a minimum of four

(4) hours before the condensing unit is operated.

Crankcase heaters are used to prevent migration or accumu- lation of refrigerant in the compressor crankcase during the off cycles and prevents liquid slugging or oil pumping on start up.

A crankcase heater will not prevent compressor damage due to a floodback or over charge condition.

WARNING

Disconnect ALL power before servicing.

1.Disconnect the heater lead in wires.

2.Using an ohmmeter, check heater continuity - should test continuous. If not, replace.

NOTE:Thepositivetemperaturecoefficientcrankcaseheater is a 40 watt 265 voltage heater. The cool resistance of the heater will be approximately 1800 ohms. The resistance will become greater as the temperature of the compressor shell increases.

S-21 CHECKING REVERSING VALVE AND SOLENOID

Occasionally the reversing valve may stick in the heating or cooling position or in the mid-position.

When stuck in the mid-position, part of the discharge gas from the compressor is directed back to the suction side, resulting in excessively high suction pressure. An increase in the suction line temperature through the reversing valve can also be measured. Check operation of the valve by starting the system and switching the operation from COOL- ING to HEATING cycle.

If the valve fails to change its position, test the voltage (24V) at the valve coil terminals, while the system is on the COOLING cycle.

If no voltage is registered at the coil terminals, check the operation of the thermostat and the continuity of the con- necting wiring from the "O" terminal of the thermostat to the unit.

If voltage is registered at the coil, tap the valve body lightly while switching the system from HEATING to COOLING, etc. If this fails to cause the valve to switch positions, remove the coil connector cap and test the continuity of the reversing valve solenoid coil. If the coil does not test continuous - replace it.

If the coil test continuous and 24 volts is present at the coil terminals, the valve is inoperative - replace it.

S-24 TESTING DEFROST CONTROL

To check the defrost control for proper sequencing, proceed as follows: With power ON; unit not running.

1.Jumper defrost thermostat by placing a jumper wire across the terminals "DFT" and "R" at defrost control board.

2.Connect jumper across test pins on defrost control board.

3.Set thermostat to call for heating. System should go into defrost within 21 seconds.

4.Immediately remove jumper from test pins.

5.Using VOM check for voltage across terminals "C & O". Meter should read 24 volts.

6.Using VOM check for voltage across fan terminals DF1 and DF2 on the board. You should read line voltage (208- 230 VAC) indicating the relay is open in the defrost mode.

7.Using VOM check for voltage across "W2 & C" terminals on the board. You should read 24 volts.

8.If not as above, replace control board.

9.Set thermostat to off position and disconnect power before removing any jumpers or wires.

NOTE: Remove jumper across defrost thermostat before returning system to service.

S-25 TESTING DEFROST THERMOSTAT

1.Install a thermocouple type temperature test lead on the tube adjacent to the defrost control. Insulate the lead point of contact.

2.Check the temperature at which the control closes its contacts by lowering the temperature of the control. Part

# 0130M00009P which is used on 2 and 2.5 ton units should close at 34°F ± 5°F. Part # 0130M00001P which is used on 3 thru 5 ton units should close at 31°F ± 3°F.

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Contents Service Instructions Fax us at 713 Fax us at 931 438 Recognize Safety SYMBOLS, Words and LabelsEmail us at customerservice@goodmanmfg.com Important InformationSafe 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 Cooling Cycle System OperationHeating CoolingHeating Cycle Defrost CycleCooling Cycle System Operation Description AFE18-60A Control BoardCOOLING/HP Analysis Chart Troubleshooting Chart61B ServicingChecking 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 ContactorSingle Phase Checking Contactor AND/OR RelaysTesting FAN Relay Copeland Comfort Alert DiagnosticsDiagnostics Table Checking Capacitor Checking Loss of Charge ProtectorChecking High Pressure Control Checking LOW Pressure Control15A 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 17B Ground Test Testing Compressor WindingsChecking Compressor 17A Resistance TestCompressor Ground Test 17C Unloader Test ProcedureUnloader Test Procedure 17D Operation TestChecking Reversing Valve and Solenoid Testing Crankcase Heater Optional ItemTesting Defrost Control Testing Defrost ThermostatSequence of Operation 40 MBR/AR*F Electronic Blower Time Delay RelayChecking Heater Limit Controls Checking Heater ElementsHeating 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 Brazing Materials Leak Testing Nitrogen or NITROGEN-TRACEDRefrigeration Repair Practice EvacuationEvacuation ChargingChecking Compressor Efficiency Final Charge AdjustmentTXV Valves 105B Thermostatic Expansion ValvePressure vs. Temperature Chart 410A Required Liquid Line Temperature Checking Subcooling OverfeedingUnderfeeding SuperheatSubcooling Formula = Sat. Liquid Temp. Liquid Line 109A TWO Speed ApplicationChecking Expansion Valve Operation Fixed Orifice Restrictor DevicesCompressor Burnout Checking Restricted Liquid LineOvercharge of Refrigerant NON-CONDENSABLESTube Sizing Accessories for lines greater than 80 feetRefrigerant Piping Long Line SET Application R-410AInstallation 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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