Goodman Mfg Comprehensive Troubleshooting Guide for Air Conditioners

Page 10

Troubleshooting Information

 

 

 

 

 

 

 

 

 

 

Unsatisfactory

 

 

 

System

 

 

Complaint

 

 

 

No Cooling

 

 

 

 

 

Operating

 

 

 

 

 

 

 

 

 

Cooling

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pressures

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

startnotwillSystem

fan-startnotwillCompressorruns

start

startnotwillfanEvaporator

startnotwillfanCondenser

onoffgoes-runsCompressoroverload

overloadoncyclesCompressor

little-continuouslyrunsSystemcooling

 

warmtoothenandcoolToo

dayswarmonenoughcoolNot

otherscooltoareasCertainto warm

 

noisyisCompressor

pressuresuctionLow

 

pressureheadLow

pressuresuctionHigh

 

pressureheadHigh

 

POSSIBLE CAUSE

SYMPTOM

CondenserandCompressorFan will not

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DOTS IN ANALYSIS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Method

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Remedy

GUIDE INDICATE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

"POSSIBLE CAUSE"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power Failure

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Voltage

Blown Fuse

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Impact Fuse Size & Type

Loose Connection

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Inspect Connection - Tighten

Shorted or Broken Wires

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Circuits with Ohmmeter

Open Overload

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Continuity of Overloads

Faulty Thermostat

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Continuity of Thermostat and Wiring

Faulty Transformer

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check Control Circuit with Voltmeter

Shorted or Open Capacitor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Capacitor

Internal Compressor Overload Open

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Continuity of Overload

Shorted or Grounded Compressor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Motor Windings

Compressor Stuck

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Use Test Cord

Faulty Compressor Contactor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Continuity of Coil and Contacts

Faulty Fan Relay

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Continuity of Coil and Contacts

Open Control Circuit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Control Circuit with Voltmeter

Low Voltage

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Voltage

Faulty Evaporator Fan Motor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Repair or Replace

Shorted or Grounded Fan Motor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Motor Windings

Improper Cooling Anticipator

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check Resistance of Anticipator

Shortage or Refrigerant

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test For Leaks, Add Refrigerant

Restricted Liquid Line

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace Restricted Part

Undersized Liquid Line

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace Line

Undersized Suction Line

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace Line

Not Enough Air across Indoor Coil

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Speed Blower, Check Duct Static Pressure

Too Much Air across Indoor Coil

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reduce Blower Speed

Overcharge of Refrigerant

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Recover Part of Charge

Noncondensibles

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Recover Charge, Evacuate, Recharge

Recirculation of Condensing Air

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Remove Obstruction to Air Flow

Infiltration of Outdoor Air

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check Windows, 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

Broken Valves

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Compressor Efficiency

Inefficient Compressor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Compressor Efficiency

High Pressure Control Open

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reset and Test Control

Unbalanced Power, 3PH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Voltage

Wrong Type Expansion Valve

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace Valve

Expansion Valve Restricted

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace Valve

Oversized Expansion Valve

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace Valve

Undersized Expansion Valve

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace Valve

Expansion Valve Bulb Loose

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Tighten Bulb Bracket

Inoperative Expansion Valve

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check Valve Operation

Loose Hold-down Bolts

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Tighten Bolts

For detailed service information refer to the Remote Condensing Unit Service manual.

NOTICE

UNITS WITH ROTARY OR RECIPROCATING COMPRESSORS AND NON-BLEED

TXV’S REQUIRE A HARD START KIT.

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Contents Shipping Inspection Important Safety InstructionsImportant Note to the Owner Regarding Product Warranty Codes & RegulationsSafe Refrigerant Handling Installation ClearancesRooftop Installations Refrigerant LinesBurying Refrigerant Lines Refrigerant Line Connections Leak Testing Nitrogen or Nitrogen-TracedSystem Evacuation Electrical Connections No LeaksHigh Voltage Connections Three Phase Compressor RotationOvercurrent Protection Low Voltage ConnectionsFinal Charge Adjustment Charge VerificationSaturated Suction Pressure Temperature Chart Fixed Orifice Expansion Valve SystemTroubleshooting Information CoolingThis page Intentionally Left Blank Split Systems Condensing AC Unit Or deathRigging Cond Unit Refrigerant Line Length ft 25-49 50-74 Tons Suct LiqRefrigerant Line Connections 208/230V 197 253 460V 414 506 Minimum Circuit Ampacity MCASingle State LOW Voltage HOOK-UP Troubleshooting Ft-lbsTroubleshooting Analysis Table Wiring Diagram

CONDENSING AC UNIT SINGLE / THREE PHASE AIR CONDITIONERS, IO-402G specifications

Goodman Manufacturing's IO-402G is a prominent model in the realm of condensing air conditioning units, designed to serve both residential and commercial applications effectively. This unit stands out due to its robust construction and impressive energy efficiency, making it a reliable choice for air conditioning needs.

One of the main features of the IO-402G is its versatile power options, available in both single and three-phase configurations. This adaptability allows it to meet various electrical requirements, ensuring compatibility with different installation environments. The unit's design incorporates a high-efficiency scroll compressor, which not only optimizes cooling performance but also enhances durability while significantly reducing operational noise.

The IO-402G is equipped with advanced refrigerant management technology, utilizing R-410A refrigerant, which is environmentally friendly and delivers superior cooling efficiency compared to older refrigerants. This feature reflects Goodman’s commitment to sustainability while also aligning with regulatory changes in refrigerant usage. The unit’s efficiency is further complemented by a high SEER (Seasonal Energy Efficiency Ratio) rating, positioning it among the more energy-efficient systems available in the market today.

In terms of construction, the IO-402G boasts a durable cabinet designed to withstand various weather conditions, featuring a powder-coated finish that resists corrosion and fading. The unit also includes sound-dampening technology to minimize operational noise, ensuring that it operates quietly even in residential settings.

Additionally, the IO-402G provides easy access for service and maintenance, thanks to a user-friendly design that simplifies troubleshooting and repairs. The system is also compatible with a range of Goodman’s thermostats and controls, which can enhance user experience through smart technology and programmable settings.

Furthermore, Goodman’s commitment to quality is reflected in the warranty coverage available with the IO-402G, typically offering a generous limited warranty on parts, underscoring the manufacturer’s confidence in the unit’s longevity and performance.

Overall, the Goodman IO-402G condensing AC unit is an excellent choice for those seeking a reliable, efficient, and durable air conditioning solution for both residential and commercial applications. Its innovative design and thoughtful features make it a standout model in Goodman’s lineup, ensuring comfort and satisfaction for users all year round.