Goodmans GSZ, ASZ, SSX, ASX, DSZ, DSX, GSX, SSZ manual Diagnostics Table

Page 40

SERVICING

DIAGNOSTICS TABLE

Status LED

Status LED Description

 

Status LED Troubleshooting Information

Green “POWER”

Module has power

Supply voltage is present at module terminals

Red “TRIP”

Thermostat demand signal

1.

Compressor protector is open

 

Y1 is present, but the

2.

Outdoor unit power disconnect is open

 

compressor is not

3.

Compressor circuit breaker or fuse(s) is open

 

running

4.

Broken wire or connector is not making contact

 

 

5.

Low pressure switch open if present in system

 

 

6.

Compressor contactor has failed open

Yellow “ALERT”

Long Run Time

1.

Low refrigerant charge

Flash Code 1

Compressor is

2.

Evaporator blower is not running

 

running extremely

3.

Evaporator coil is frozen

 

long run cycles

4.

Faulty metering device

 

 

5.

Condenser coil is dirty

 

 

6.

Liquid line restriction (filter drier blocked if present in system)

 

 

7.

Thermostat is malfunctioning

Yellow “ALERT”

System Pressure Trip

1.

High head pressure

Flash Code 2

Discharge or suction

2.

Condenser coil poor air circulation (dirty, blocked, damaged)

 

pressure out of limits or

3.

Condenser fan is not running

 

compressor overloaded

4.

Return air duct has substantial leakage

 

 

5.

If low pressure switch present in system,

 

 

 

check Flash Code 1 information

Yellow “ALERT”

Short Cycling

1.

Thermostat demand signal is intermittent

Flash Code 3

Compressor is running

2.

Time delay relay or control board defective

 

only briefly

3.

If high pressure switch present go to Flash Code 2 information

 

 

4.

If low pressure switch present go to Flash Code 1 information

Yellow “ALERT”

Locked Rotor

1.

Run capacitor has failed

Flash Code 4

 

2.

Low line voltage (contact utility if voltage at disconnect is low)

 

 

3.

Excessive liquid refrigerant in compressor

 

 

4.

Compressor bearings are seized

Yellow “ALERT”

Open Circuit

1.

Outdoor unit power disconnect is open

Flash Code 5

 

2.

Compressor circuit breaker or fuse(s) is open

 

 

3.

Compressor contactor has failed open

 

 

4.

High pressure switch is open and requires manual reset

 

 

5.

Open circuit in compressor supply wiring or connections

 

 

6.

Unusually long compressor protector reset time

 

 

 

due to extreme ambient temperature

 

 

7.

Compressor windings are damaged

Yellow “ALERT”

Open Start Circuit

1.

Run capacitor has failed

Flash Code 6

Current only in run circuit

2.

Open circuit in compressor start wiring or connections

 

 

3.

Compressor start winding is damaged

Yellow “ALERT”

Open Run Circuit

1.

Open circuit in compressor run wiring or connections

Flash Code 7

Current only in start circuit

2.

Compressor run winding is damaged

Yellow “ALERT”

Welded Contactor

1.

Compressor contactor has failed closed

Flash Code 8

Compressor always runs

2.

Thermostat demand signal not connected to module

Yellow “ALERT”

Low Voltage

1.

Control circuit transformer is overloaded

Flash Code 9

Control circuit < 17VAC

2.

Low line voltage (contact utility if voltage at disconnect is low)

Flash Code number corresponds to a number of LED flashes, followed by a pause and then repeated

TRIP and ALERT LEDs flashing at same time means control circuit voltage is too low for operation.

Reset ALERT Flash code by removing 24VAC power from module

Last ALERT Flash code is displayed for 1 minute after module is powered on.

40

Image 40
Contents Service Instructions Recognize Safety SYMBOLS, Words and Labels Email us at customerservice@goodmanmfg.comImportant Information Fax us at 713 Fax us at 931 438Safe Refrigerant Handling Product Identification Split System Heat Pumps R410AModel # Description Split System Air Conditioners R410A ASX130**1AA Single Piece Air Handlers AWUF****1AA MBR/MBE Air Handlers Product Identification 1824 3642 Accessories ASX13DSX/SSX16 ASX18 ASZ13 DSZ/SSZ16 ASZ18 Expansion Valve Kits FSK01A Coil Accessories Electric Heat Kitapplications Aruf Electric Heat Kitapplications Aepf Product Design Condensing UnitFigure a Capacity Control System Operation HeatingCooling Cooling CycleDefrost Cycle Heating CycleCooling Cycle System Operation AFE18-60A Control Board DescriptionTroubleshooting Chart COOLING/HP Analysis ChartServicing 61BChecking Wiring Checking THERMOSTAT, WIRING, and Anticipator3A Thermostat and Wiring Checking Voltage3B Cooling Anticipator 3C Heating AnticipatorChecking Time Delay Relay Testing Coil CircuitChecking Transformer Control Circuit Checking Cycle ProtectorTesting Compressor Contactor Single PhaseChecking Contactor AND/OR Relays Checking Contactor ContactsCopeland Comfort Alert Diagnostics Testing FAN RelayDiagnostics Table Checking Loss of Charge Protector Checking High Pressure ControlChecking LOW Pressure Control Checking Capacitor15B Capacitance Check 15A Resistance CheckRELAY, Start 16A Checking FAN and Blower Motor Windings PSC Motors 16B Checking FAN and Blower Motor ECM MotorsChart on Next Chart from Previous 16D ECM CFM Adjustments MBE / Aepf 16C Checking ECM Motor WindingsCFM 16F Checking GE X13TM Motors 16E Blower Performance DataGE X13TM Motor Connections Testing Compressor Windings Checking Compressor17A Resistance Test 17B Ground Test17C Unloader Test Procedure Unloader Test Procedure17D Operation Test Compressor Ground TestTesting Crankcase Heater Optional Item Testing Defrost ControlTesting Defrost Thermostat Checking Reversing Valve and Solenoid40 MBR/AR*F Electronic Blower Time Delay Relay Checking Heater Limit ControlsChecking Heater Elements Sequence of OperationMBR/AR*F with Single Stage Heat Pumps Heating OperationDefrost Operation 41 MBE/AEPF with GSX, SSX, ASX, DSXMBE/AEPF with Single Stage GSX, ASX and SSX Condensers 41A MBE/AEPF with Single Stage GSZ, SSZ, & ASZ Heat Pumps Sequence of Operation MBE/AEPF with TWO Stage ASX & DSX CondensersMBE/AEPF with TWO Stage ASZ & DSZ Heat Pump Units Electric Heater Optional Item 61B Checking Heater Fuse Link Optional Electric Heaters 61A Checking Heater Limit ControlsFormulas Leak Testing Nitrogen or NITROGEN-TRACED Refrigeration Repair PracticeEvacuation Brazing MaterialsCharging EvacuationFinal Charge Adjustment Checking Compressor Efficiency105B Thermostatic Expansion Valve TXV ValvesPressure vs. Temperature Chart 410A Required Liquid Line Temperature Overfeeding UnderfeedingSuperheat Checking Subcooling109A TWO Speed Application Checking Expansion Valve OperationFixed Orifice Restrictor Devices Subcooling Formula = Sat. Liquid Temp. Liquid LineChecking Restricted Liquid Line Overcharge of RefrigerantNON-CONDENSABLES Compressor BurnoutAccessories for lines greater than 80 feet Refrigerant PipingLong Line SET Application R-410A Tube SizingInstallation Requirements AIR Handler External Static Initial System ChargingTotal External Static Coil Static Pressure DropStatic Pressure Drop Accessories Wiring Diagrams ALL Fuel System AFE18-60A Control Board10kw 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