SERVICING

COOLING /HEAT PUMP- SERVICE ANALYSIS GUIDE

Complaint

 

 

No Cooling

 

 

 

Unsatisfactory Cooling/Heating

 

System Operating

 

 

 

 

 

 

 

 

 

Pressures

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ProcedureServiceSee Ref.

POSSIBLE CAUSE

notwillSystemstart

startnotwillCompressor-fan runs

FanCond.andComp.will not start

willfanEvaporatornot start

willfanCondensernot start

offgoes-runsCompressoron overload

oncyclesCompressoroverload

-continuouslyrunsSystemlittle cooling/htg

toothenandcoolToowarm

warmonenoughcoolNot days

otherscool,tooareasCertaintoo warm

noisyisCompressor

coldblows-runsSystemair in heating

terminatenotwillUnitdefrost

defrostnotwillUnit

pressuresuctionLow

pressureheadLow

pressuresuctionHigh

pressureheadHigh

Test Method Remedy

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DOTS IN ANALYSIS GUIDE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INDICATE SYMPTOM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

"POSSIBLE CAUSE"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pow er Failure

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Voltage

S-1

Blow n Fuse

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Inspect Fuse Size & Type

S-1

Unbalanced Pow er, 3PH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Voltage

S-1

Loose Connection

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Inspect Connection - Tighten

S-2, S-3

Shorted or Broken Wires

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Circuits With Ohmmeter

S-2, S-3

Open Fan Overload

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Continuity of Overload

S-17A

Faulty Thermostat

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test continuity of Thermostat & Wiring

S-3

Faulty Transformer

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check control circuit w ith voltmeter

S-4

Shorted or Open Capacitor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Capacitor

S-15

Internal Compressor Overload Open

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Continuity of Overload

S-17A

Shorted or Grounded Compressor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Motor Windings

S-17B

Compressor Stuck

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Use Test Cord

S-17D

Faulty Compressor Contactor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test continuity of Coil & Contacts

S-7, S-8

Compressor High Stage Not Working

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Voltage to Unloader Plug, Test Plug

S-17C

Open Control Circuit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Control Circuit w ith Voltmeter

S-4, S-11, S-12

Low Voltage

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Voltage

S-1

Faulty Evap. Fan Motor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Repair or Replace

S-16

Shorted or Grounded Fan Motor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Motor Windings

S-16A,D

Improper Cooling Anticipator

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check resistance of Anticipator

S-3B

Shortage of Refrigerant

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test For Leaks, Add Refrigerant

S-101,103

Restricted Liquid Line

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Remove Restriction, Replace Restricted Part

S-112

Open Element or Limit on Elec. Heater

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Heater Element and Controls

S-26,S-27

Dirty Air Filter

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Inspect Filter-Clean or Replace

 

Dirty Indoor Coil

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Inspect Coil - Clean

 

Not enough air across Indoor Coil

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check Blow er Speed, Duct Static Press, Filter

S-200

Too much air across Indoor Coil

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reduce Blow er Speed

S-200

Overcharge of Refrigerant

 

 

 

 

 

 

 

 

 

 

 

 

 

Recover Part of Charge

S-113

Dirty Outdoor Coil

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Inspect Coil - Clean

 

Noncondensibles

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Recover Charge, Evacuate, Recharge

S-114

Recirculation of Condensing Air

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Remove Obstruction to Air Flow

 

Infiltration of Outdoor Air

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check Window s, Doors, Vent Fans, Etc.

 

Improperly Located Thermostat

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Relocate Thermostat

 

Air Flow Unbalanced

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Readjust Air Volume Dampers

 

System Undersized

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Refigure Cooling Load

 

Broken Internal Parts

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace Compressor

S-115

Broken Valves

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Compressor Efficiency

S-104

Inefficient Compressor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Compressor Efficiency

S-104

Loose Hold-dow n Bolts

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Tighten Bolts

 

Faulty Reversing Valve

 

 

 

 

 

 

 

 

 

 

 

 

Replace Valve or Solenoid

S-21, 122

Faulty Defrost Control

 

 

 

 

 

 

 

 

 

 

 

 

Test Control

S-24

Faulty Defrost Thermostat

 

 

 

 

 

 

 

 

 

 

 

 

Test Defrost Thermostat

S-25

Flow rator Not Seating Properly

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check Flow rator & Seat or Replace Flow rator

S-111

 

 

 

 

Cooling or Heating Cycle (Heat Pump)

 

 

 

Heating Cycle Only (Heat Pump)

 

21

Page 21
Image 21
Goodman Mfg R-410A manual Servicing, Cooling /HEAT PUMP- Service Analysis Guide

R-410A specifications

Goodman Manufacturing, a well-respected name in the HVAC industry, has made significant advancements with their R-410A refrigerant technology. R-410A, a hydrofluorocarbon (HFC), has positioned itself as a superior alternative to the older R-22 refrigerant, which has been phased out due to its ozone-depleting properties. Goodman’s commitment to energy efficiency and environmental sustainability is well reflected in their use of R-410A in their air conditioning and heat pump systems.

One of the main features of Goodman’s R-410A systems is their exceptional energy efficiency. The R-410A refrigerant operates at a higher pressure than R-22, which allows for better heat transfer and improved cooling capacity. This results in reduced energy consumption and lower utility bills for consumers. Goodman’s air conditioning units designed for use with R-410A are often rated with high Seasonal Energy Efficiency Ratio (SEER) ratings, making them an eco-friendly choice for residential and commercial applications.

Another notable technology employed by Goodman is their commitment to reliable performance through advanced compressor designs. Goodman's scroll compressors are optimized for R-410A, ensuring quieter operation and reducing vibration levels. These compressors are known for their efficiency and longevity, making them a favorite among homeowners seeking dependable and durable climate control solutions.

Goodman's multi-stage cooling systems that utilize R-410A offer precise temperature control and enhanced comfort. By controlling the speed of the compressor, Goodman’s units can adjust output according to the heating or cooling demand, maximizing comfort while minimizing energy waste. This adaptability not only enhances indoor air quality but also contributes to a greener environment by using less energy.

Furthermore, Goodman incorporates high-tech diagnostic controls into their systems. These controls provide real-time performance data, allowing homeowners and technicians to monitor system status and troubleshoot issues more easily. By using R-410A combined with these innovative technologies, Goodman emphasizes reliability and user-friendly operation.

In conclusion, Goodman Manufacturing’s use of R-410A refrigerant reflects their dedication to efficiency, reliability, and environmental stewardship in HVAC solutions. The combination of advanced compressor technologies, high energy efficiency, and innovative controls solidifies Goodman’s reputation as a leader in the industry, offering homeowners and businesses the comfort and peace of mind they deserve.